Hazard and Risk Management System (HARMS) Workbook ...

Capital Delivery

Project Number 80023696

Version: See BC Version

Click to adjust row height Click to add row

Hazard (Put References in Column B, using

next in sequence after that in appropriate coloured cells in rows 1 to 4))

Perceived consequences Actions to be considered "Structure"/ location considered to be

At Risk,

Section A: Ground Conditions * Section B: Hazardous Environment * Section C: Existing Working Environment * Section D: Existing Services * Section E: Proximity of other structure

Assessment Stage with

reference info:Blank = not yet considered,

Otherwise insert originator's initials

and date

Use tick box if N/A

Hazard

Refs. (If

hazard N/A, tick

box)

12 November 2015

Man Trunk UIDs - SAL0018 Project Name:

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Hazard and Risk Management System (HARMS) Workbook -- Hazard Identification Checklist

Date:

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Section A.

GROUND CONDITIONS

Perceived consequences Actions to be considered "Structure"/ location considered to be At

Risk.

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Running sand Trench collapse, injury Further SI, include piezometers, sheet piling All excavations

A1

1 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Unstable strata formations - excavations within made ground, water logged sands/gavels and made ground

Trench/excavation collapse, stability of structures

Properly specified and designed TBM, ground support, de-watering and application of appropriate site controls.

All excavations. High Risk - all tunnels and shafts. SAL 0018 CSO, Peel Green Road

A2

2 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Unstable slopes on the land Failure of embankments Carry out appropriate GI, properly designed permanated and temporary works to limit movements of embankments and surcharge loads imposed on new structures. Design pipe away from sludge lagoon

Tunnels S01 to S02, and S02 to S03, Shaft 01, Shaft 02, new 2m diameter sewer next to former sludge lagoon, new outfall to MSC.

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Unstable rock outcrops

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Seismic activity

A3

3 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Sub- artesian conditions identified in BHs at Shaft 01

Flooding of excavations, failure of excavations, structural failures, flotation of structures

Ground investigation, appropriate construction methods, groundwater monitoring, appropriate design of temporary and permanent works

Shaft 01, 02 and Tunnel S1 - S2

A4

4 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Potential to contaminate existing aquifer, public or private water supplies

Pollution of water supply Carry out testing of groundwater and employ appropriate methods for disposal of water arising from the works. Design GI and permanent works to prevent introduction of pathways for pollutants.

All tunnels, works within WwTW, Shaft 04 and outfall to MSC

A5

5 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Contaminated ground water Pollution of aquifer and surface watercourses including Salteye Brook and Manchester ship Canal . Contact with hazardous substances by construction operatives. Pollution risk from WwTW if contaminated groundwater disposed of through sewers.

Carry out hydrogeological investigation and employ appropriate methods for disposal of pumped water

All excavations and tunnels within areas of made ground or adjacent to/below areas of made ground in particular landfill site and former sludge lagoon

0

DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Deep or shallow mine workings Deep Mine Workings only, instability of

structuresObtain information from Coal Authority

A6

6 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Steep / Slippery Slopes Falls, including falls into deep and potential fast flowing water

Put in place a comprehensive method statements and mitigation measures such as barriers and signage

Works at Sallteye Brook crossing, MSC outfall and access to ex SAL0018 subway

0

DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Wells / air raid shelters or other voids Excavation collapse, rapid inundation of liquids

or gasesIdentify potential locations as part of desk study (Enviorcheck, site visit)

All locations

A7

7 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Asbestos Contact/inhalation by operatives Carry out appropriate GI and asbestos surveys

All excavations in made groundEx electrical installations

A8

8 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Contaminated land Contact with hazardous substances, fire or explosion,

Carry out testing of ground for contaminates. Use of robust method statements and following current guidance on dealing with contaminated land

All excavations and tunnels within areas of made ground or in close proximity to areas of made ground in particular landfill site and former sludge lagoon

A9

9 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Highly permeable ground Rapid Inundation of excavations, instability of excavations and structures. Risk of flotation

Desk top studies and on-site testing to determine permeability. Design for flotation in both temporary and permanent conditions

All shafts and tunnels; pipelines, CSO chambers

A10

10 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 23/06/15

Existing abandoned underground structures Stability of structure and surrounding ground. Existing structure may contain groundwater/sludge/pockets of gas.

Desk top studies to identify structures and available records.Trial holes. Control through method statements. Existing buried pipes to be broken out to allow construction

Abandoned 2300 and 1770x1150 sewers within WwTW. Abandoned trunk sewer in Peel Green Rd (entrance to WwTW).

A11

11 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Uncharted test piles for Barton HLB Test piles encountered by TBM below Barton HLB leading to over excavation and increased risk of ground movement. Intervention required below bridge to remove piles.

Obtain records from HA. Undertake non-intrusive SI to confirm route free of piles.Consider TH below BHLB if non-intrusive methods prove inconclusive.If piles are found then inform HA and enter into process to obtain agreement to method for pile removal.

Tunnel S3 to S4

A12

12 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Piles to bases of former o/h electricity pylon. Piles encountered by TBM leading to over excavation and increased risk of ground movement. Intervention required to remove piles.

Obtain historical records from Statutory undertakers. Undertake TH to confirm pile location sand undertake tests to confirm length of pile and whether it affects tunnel.If piles are found to affect the tunnel then agree methodology for removal with relevant authorities.

Tunnel S2 to S3 at Shaft 02 working area.

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Section B

HAZARDOUS ENVIRONMENT


Risk.

0 Underground storage facilities0 Industrial or Manufacturing processes

B1

1 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Petrol station or fuel storage site Explosion Confirm location of fuel storage areas and petrol stations that in the event of a spillage can discharge to sewer network.

Sewer network, WwTW

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Tannery or Animal processing

B2

2 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Refuse Tipping (Industrial or Domestic) Exposure to harmful substances, sharps etc Desk study to identify formal tips and site visit to asses any fly tipping issues

WwTW due to filling and disposal of material, area to west of M60 known landfill site

B3

3 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Military Firing Range or area of WW2 bombing – Unexploded Ordnance (UXO)

Explosion Desk study to confirm risk of UXO. Non-intrusive site investigation sif considered feasible. UXO Safety awareness talks

All construction areas to west of M60 including tunnels

B4

4 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Stored chemicals in tanks Explosion, burns, inhalation of toxic fumes Obtain O&M and H&S files for site. Ensure all visitors and operatives receive site induction and follow site rules. Design new works, accesses and working areas to avoid contact with storage areas. Liaison with landowners.

Works within WwTW site. 3rd party land.

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Insulation or lagging

B5

5 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

COSHH issues Burns, skin irritation, inhalation of toxic fumes Obtain O&M and H&S files for site. Liaison with landowners.

Works within WwTW site. 3rd party land.

B6

6 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Vermin – rats / pigeons / seagulls – poisons Leptospirosis and other diseases and infections

Training and PPE. Obtaining information on known problem areas from UU Ops

Sewer networks, watercourses

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Radon

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Sources of radiation

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Sharps/Syringes

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Existing COMAH site

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Fragile roofs or skylights

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Legionella

B7

7 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Contact with live sewage, high flows, flooding and surcharge

Entrapment, explosion, fire, inhalation, disease, infection.

PPE, forced ventilation, gas tests, emergency exit. Control through method statement sand training. Provide the flow data

All existing and proposed structures. High risk - all new sewer and tunnels and ex. SAL0018 CSO and access subway

B8

8 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Discharges to or re-suspension of contamination within silt at base of MSC channel.

Toxic conditions within MSC Liaison with MSC operations team. New outfallto MSC.

B9

9 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Unauthorised discharges from UID works to sewers and WwTW treatment process

Chemical overloading of works leading to failure of treatment process or WwTW operatives coming into contact with hazardous substances

All discharges from UID works to be controlled via WwTW permit system.

All works areas.

B10

10 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Rapid changes in water pressure or flows within MSC due to operation of sluices at locks.

Differential pressures or strong currents immediately downstream of locks

Liaison with MSC operations team New outfall to MSC.

B11

11 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Exhaust gases and spray from motor vehicles, significant volumes of traffic that will be stationary during peak times. Debris thrown from vehicles

Operatives sprayed with surface water runoff from carriageway that may contain chlorides or other substances. Carbon monoxide build up from stationary traffic. Operatives struck with debris from vehicles.

Gas detection equipment in excavations. Appropriate PPE. Adequate fencing of working areas.

High risk - Shafts 01, 02 and tunnel S1 - S2. Other areas, A57 access and Peel Green Rd works.

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Section C

EXISTING WORKING ENVIRONMENT


At Risk.

C1

1

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Trade Effluent Explosion, fire, inhalation of toxic fumes, surges in flow

Obtain list of known trade effluent discharge consents

All existing and proposed structures.

C2

2

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Noise, ground movement and vibration from construction activities in close proximity to residential properties.

Disturbance to residents and potential for structural damage to properties.

Impose noise, ground movement and vibration limits on works. Limit night and weekend working. Impliment ground minitoring techniques. Liaison with local residents.

Shafts 01, 02 and tunnel S1 - S2; Peel Green Road Shaft

C3

3

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Restricted access to residential properties due to working areas.

Unsafe and limited access/egress for residents. Potential for injury or distress.

Provide adequate access to properties acceptable alternative parking arrangements. Ensure access/parking caters for young/old/disabled residents and are properly lit. Working areas to be adequately fenced. Provided temporary footpath diversions. Continued engagement with local residents.

Shafts 01, 02 and tunnel S1 - S2

C4

4

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Asbestos Contact/inhalation by operatives Carryout asbestos survey and removal ahead of the works

Existing electrical panels within WwTW and potentially within areas of made ground. Shaft 04 Working area and access road from A57

C5

5

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Extremes of temperature Failure of plant and equipment, adverse effects of operatives

Consider providing forced ventilation during the works and O&M

New shafts and tunnels and existing sewer network .

C6

6

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Extremes of humidity Failure of plant and equipment, adverse effects of operatives

Consider providing forced ventilation during the works and O&M

New shafts and tunnels and existing sewer network .

Based on Template Ref HST 020 Hazard and Risk Management System (HARMS) Version 2.0 July 2011

Capital Delivery

C7

7

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Working adjacent/below/on motorway main carriageway and slip roads

Accidents, queuing traffic, operatives being struck by vehicles

Agreeing lane closures etc and working procedures with Highways Agency ASC. Obtain necessary approvals from HA/ASC. Consider off peak period delivery/removal. Consider access and egress points. Use approved HA TM contractor.

Shafts 01, 02 and tunnel S1 - S2

C8

8

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Working adjacent to or within 'live' carriageways

Accidents, queuing traffic, operatives being struck by vehicles or debris

Agreeing lane closures etc and working procedures with Highway Authority. Obtain necessary approvals from Highway Authority. Use approved HA TM contractor. Signage/coning to Chapter 8. Appropriate fencing of works.

A57 access works. Works within Peel Green Rd.

C9

9

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Using residential streets to access working areas. Roads designated as play streets. Significant on-street parking.

Accidents, damage to 3rd party vehicles Agreeing access route with local authority and consult with residents on access route.Engage with residents over managing on-street parking.Manage vehicle movements to working areas to avoid conflicts with construction/3rd party vehicles.Use works access of M60 slip roads for delivery of large items of plant/materials

Shaft 02 working area

C10

10

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Limited space within working areas for storage of spoil, materials, plant, vehicles etc and vehicle movements.

Accidents, injuries, unstable stockpiling of spoil or storage of materials.

Consider offsite (Eccles WwTW) storage.Maximise available working area (UU has purchased No.09 Laburnum Ave).Detailed planning of site layout, vehicle movements and construction sequence.

Shaft 01 and Shaft 02 working areas

C11

11

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Wastewater Treatment Hydraulical overloading of the works, failure of works to meet regulatory consents

Discharge pumped groundwater following quality assessments and obtain permits to discharge form UU Network and WwTW permitting teams.

All works on sewerage network and Eccles WwTW.

C12

12

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 23/06/15

Existing underground chambers and sewers Entrapment, confined space, inhalation of gases, explosions

Forced ventilation All existing underground structures.High risk - existing SAL0018 subway and CSO chamber and new shaft sand tunnels. Peel Green Road. Entrance to Eccles WwTW

C13

13

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Eccles Archery Club adjacent to northern boundary of Eccles WwTW working area. Club to remain in use throughout works

Injury from stray arrows Engagement with Eccles Archery Club.Implementation of mitigation measures, procedures and method statements to prevent injury.

Spoil bund formation area on Eccles WwTW

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Section D

Existing Services


At Risk.

D1

1 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Making alterations to existing 1980mm NB brick sewer that conveys combined flows. Excavating immediately adjacent to 1980 NB sewer.

Significant flows, flooding, surcharging or collapse resulting in injury or drowning

Plan works to take into account weather conditions. Undertake internal surveys to confirm structural condition. Provide flow data

1980mm dia brick sewer, MH01, and MH02, existing SAL 0018 CSO chamber, New SAL 0018 CSO

D2

2 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Tunnelling below 1980NB brick sewer with cracks visible in soffit

Potential for new or worsening of existing structural defects leading to a potential collapse below the M60.

Design tunnel vertical and horizontal alignments to minimise risk of damage to sewer. Undertake appropriate GI. Select and design tunnelling works to minimise risk of ground settlement and subsequent damage to sewer. Undertake CCTV surveys to determine structural condition. Undertake appropriate monitoring during tunnelling works. Set allowable settlement and vibration limits.

1980mm NB brick sewer above tunnel S1 - S2

B3

3 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Traversing plant/storing spoil & materials above ex 1980NB sewer.

Potential for structural failure leading to collapse. Risk of injury, drowning, flooding, erosion of ground.

Obtain records. Undertake surveys to determine existing condition. Undertake TH to determine sewer construction (concrete surround?).Assess structural capacity. If appropriate provide protection to sewer or limit weight of plant/spoil/materials over or adjacent to sewer.Monitor condition during construction.

Shaft 01 working area.

D4

4 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Major Accident Hazard Pipelines (see in-cell comment)

Fire, explosion, disruption to services Undertake Linesearch - no MAHP within proximity of works. No further action proposed.

D3

3 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

24" steel trunk water mainConstructing shaft in immediate vicinity of main and tunnelling in close proximity and below main.Main known to be in poor condition with reported bursts in recent years.

Bursts, rapid inundation of excavations, erosion of banks of MSC, loss of service, injuries, work stoppage

Liaison with UU water networks team.Diversion/replacement of section sof main considered to be at unacceptable levels of risk.Undertake TH to confirm exact location/depth/condition.

Shaft 04 and tunnel S3 - S4.

D4

4 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

BT overhead cables Plant movements and undertaking works below cables. Striking services, disruption to services, delays

Seek undertaker's opinion and carry out diversions ahead of the works where necessary.

Shaft 01 working area and Peel Green Rd WwPS working area

D5

5 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Virgin media fibre optic cables Undertaking excavations in close proximity to cables or traversing over the cables with plant. Striking services, disruption to services, delays

Seek undertaker's opinion and carry out diversions ahead of the works where necessary.

Shaft 04/New MSC outfall. Shaft 01 working area (footpaths).

D6

6 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

High Voltage Electricity (incusing sub-stations) Fire, explosion, electrocution, disruption to services

Obtain service records. Undertake service scan as part of topo survey. Undertake THs at critical locations or at critical services. Engage the suppliers. Provide protection slab over services. Consider construction method.Identify and order diversions where required. Liaise with services undertakers.

Shaft 01 and Shaft 02 working areas, Tunnel S3 to S4.Temporary construction accesses crossing servicesSub-station immediately adjacent to Shaft02 working area and immediately above tunnel S2 - S3.Peel Green Rd working areas

D7

7 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Low Voltage Electricity Fire, explosion, electrocution, disruption to services

Seek undertaker's opinion and carry out diversions ahead of the works where necessary. Provide protection slab for services; Consider construction method

Shaft 01 , Eccles WwTW and Peel Green Road working areas

D8

8 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Low pressure gas mains Fire, explosion, disruption to services Seek undertaker's opinion and carry out diversions ahead of the works where necessary. Consider construction method

Peel Green Road working areas

D9

9 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Low pressure water mains Bursts, inundation of excavations, erosion of ground, loss of service, injuries, work stoppage

Seek undertaker's opinion and carry out diversions ahead of the works where necessary. Consider construction method


D10

10 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

BT overhead cables Loss of service, work stoppage Seek undertaker's opinion and carry out diversions ahead of the works where necessary. Design pipeline to avoid telegraph poles


D11

11 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

3 x 1050NB cast iron trunk water mains - THIRLMERE AQUEDUCTCrossing below aqueduct with new 1200NB ewer.

Bursts, rapid inundation of excavations, erosion of ground, flooding of homes, loss of service, injuries, work stoppage

Liaison with UU team responsible for aqueduct.Undertake TH to confirm exact location/depth/condition.Develop method statements in conjunction with UU asset team for undertaking aqueduct crossing. Consider construction method. Consider micro-tunnelling

New 1200NB sewer u/s of Eccles WwTW inlet CSO. Temporary access road to Eccles WwTW site compound.

D12

12 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Redundant 165NB cast iron Naptha main Fire, explosion Obtain records and agree methodology for removal with asset owner

Tunnel S3 to S4 and Shaft04/Outfall.

D13

13 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Motorway communications and lighting cables Fire, explosion, electrocution, disruption to services

Obtain records from HA and agree methodology for protection with asset owner. Undertake trial pits. Provide services protection slab

Access to Shaft 01 and Shaft02 working areas

D14

14 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Motorway main carriageway and slip road drainage

Inundation of working areas or excavation, flooding of highways with the potential to cause accidents

Obtain records from HA and agree methodology for protection with asset owner

Access to Shaft 01 and Shaft02 working areas, Tunnel S1 - S2, Tunnel S3 - S4 (Barton HLV low level carrier drains)

D15

15 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

UU sewers - Existing 1200 NB surface water sewer and 1000NB combined sewer.New 2000NB sewer if construction sequence results in tunnel crossing following installation

Potential for new or worsening of existing structural defects leading to a potential collapse or loss of structural integrity/watertightness. Ingress of fines into sewer leading to ground movement and potential failure of earthworks above sewers.

Design tunnel vertical and horizontal alignments to minimise risk of damage to sewers. Undertake appropriate GI. Select and design tunnelling works to minimise risk of ground settlement and subsequent damage to sewer. Undertake CCTV surveys to determine structural condition. Undertake appropriate monitoring during tunnelling works. Set allowable settlement and vibration limits.

Existing assets during tunnelled crossing below assets - Tunnel drive S2 - S3

D16

16 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

HA Assets - 2 no. 2400 x 3000 culverts - SALTEYE BROOK CULVERTS

Potential for new or worsening of existing structural defects leading to a potential collapse or loss of structural integrity/watertightness. Ingress of fines into sewer leading to ground movement and potential failure culverts or M60 embankment above sewers.

Design tunnel vertical and horizontal alignments to minimise risk of damage to culverts. Undertake appropriate GI. Select and design tunnelling works to minimise risk of ground settlement and subsequent damage to culverts. Undertake man-entry surveys to determine structural condition. Undertake appropriate monitoring during tunnelling works. Set allowable settlement and vibration limits.

Existing assets during tunnelled crossing below assets - Tunnel drive S2 - S3

D17

17 DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Service pipes and tanks Fire, explosion, disruption to services, inundation of excavations, drowning, excavation collapse

Obtain service records. Underatke service scan as part of top survey. Undertake THs at critical locations or at critical services. Identify and order diversions where required

All new pipelines, manholes, shafts, tunnels and structures

D1818 LC 31/01/13 LC 14/02/14 Existing 250mm sludge main which operates

at pressures up to 25 barsDamage from construction plant and vehicles for proposed temporary car park

Provide protection at crossing points and below temporary car park

Eccles WwTW temporary access road; 2m diameter pipeline; temporary car park

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Ductwork e.g. Air conditioning or ventilation)

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Cathodic Protection

19 LC 31/01/13 LC 14/02/14 Existing 980x900 Brick Sewer Collapse of structure Undertake trial pits to confirm cover depth and sewer details


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Section E

PROXIMITY TO OTHER STRUCTURE(S)

potentially affected by the works


Risk.

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Pipe bridges and supports

E1

1

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

ZM

06/09/2012

LC 14/02/14

Residential buildings in close proximity to large plan area, deep excavations.

Ground movement or vibration resulting in instability, structural defects, partial or full structural failure

Undertake pre- and post- construction structural assessments as appropriate. Undertake GI and other SI to obtain relevant information to be able to design and undertake works in a manner to minimise vibration and ground movement. Avoid structures by design if possible. Provide sufficient working space around structures to avoid impact damage or undermining. Undertake appropriate monitoring during the works. Set allowable settlement and vibration limits.

Residential properties at the Shaft 01, Shaft 02 and Peel Green Road working areas.

C


Capital Delivery

E2

2

DRS

29/10/13

LC

31/01/13

ZM

06/09/2012

LC 14/02/14

Pre-fabricated garages, garden walls in close proximity to deep excavations or located above tunnelling works.


Undertake pre- and post- construction structural assessments as appropriate. Undertake GI and other SI to obtain relevant information to be able to design and undertake works in a manner to minimise vibration and ground movement. Avoid structures by design if possible. Provide sufficient working space around structures to avoid impact damage or undermining. Undertake appropriate monitoring during the works. Set allowable settlement and vibration limits.

Garden walls to residential properties in close proximity to the Shaft 01, Shaft 02 and Peel Green Rd working areas and garages above the line of the tunnel S2 - S3

E2

2

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Shaft construction and tunnelling affecting M60 Embankment, M60 JN11 Bridge abutments, M60 Jn11 slip road retaining walls, Salteye Brook access points retaining walls


Undertake pre- and post- construction structural assessments as appropriate. Undertake GI and other SI to obtain relevant information to be able to design and undertake works in a manner to minimise vibration and ground movement. Avoid structures by design if possible. Provide sufficient working space around structures to avoid impact damage or undermining. Undertake appropriate monitoring during the works. Set allowable settlement and vibration limits.Follow HA DMRB procedures for managing geotechnical risks and obtain AIP from HA for works affecting these HA assets prior to works commencing.

M60 Embankment, M60 JN11 Bridge abutments, M60 Jn11 slip road retaining walls, Salteye Brook access points retaining walls. Tunnel S1 - S2 and S2 - S3

E2

2

DRS

01/11/2011

LC 31/01/13 ZM

06/09/2012

LC 14/02/14

Tunnelling affecting M60 Barton High Level Bridge


Undertake pre- and post- construction structural assessments as appropriate. Undertake GI and other SI to obtain relevant information to be able to design and undertake shaft construction and tunnelling works in a manner to minimise vibration and ground movement. Avoid affecting structures by design if possible. Provide sufficient working space around structures to avoid impact damage or undermining. Undertake appropriate monitoring during the works. Set allowable settlement and vibration limits.Follow HA DMRB procedures for managing geotechnical risks and obtain AIP from HA for works affecting these HA assets prior to works commencing.

M60 Barton High Level Bridge - Tunnel S3 - S4

E2

2

DRS

01/11/2011

LC 31/01/13 ZM

06/09/2012

LC 14/02/14

UU asset - 3300 x 2180 storm water box culvert founded on piles. Tunnel crossing below culvert.

Piled foundation within S2 - S3 tunnel alignment. Piles will prevent progress of tunnelling requiring surface intervention. Inevitable damage to culvert.Storm flows within culvert may result in rapid inundation of excavations or working areas if flows not dealt with effectively during pile removal. Inadequate measures to deal with flows will result in severe flooding from the sewer network upstream of the Eccles WwTW Inlet CSO.

Undertake site investigation to determine, location, size and length of piles. Remove piles prior to tunnel commencing. Install suitable measures to deal with flows during pile removal.

3300 x 2180 r.c. storm water box culvert in Eccles WwTW.

E3

3

DRS

29/10/13

LC 31/01/13 ZM

06/09/2012

LC 14/02/14

UU asset - 3300 x 2180 storm water box culvert founded on piles. Removal of section to form new surcharge relief chamber

Section of culvert requires removal to form new chamber.Storm flows within culvert may result in rapid inundation of excavations or working areas if flows not dealt with effectively during pile removal. Inadequate measures to deal with flows will result in severe flooding from the sewer network upstream of the Eccles WwTW Inlet CSO.

Obtain record information for structure. Undertake surveys to confirm condition of culvert. Install suitable measures to deal with flows during culvert removal.

3300 x 2180 r.c. storm water box culvert in Eccles WwTW.

E4

4

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

UU assets - 1240 x 1240 final effluent culvert and 3000 x 2000 storm water box culvert located within working area for Shaft 03.

Structural capacity of culverts unknown. Area above the culverts potentially subject to plant movements, material storage, spoil treatment and stockpiling. Potential for structural failure/collapse leading to rapid inundation of excavations or working areas and severe flooding from the sewer network upstream of the Eccles WwTW Inlet CSO.

Obtain record information for structures. Undertake surveys to confirm condition of culverts, wall thickness rebar etc. Determine structural capacity of culverts. Limit plant movements, storage and stockpiling to suit structural capacity.

1240 x 1240 final effluent culvert and 3000 x 2000 r.c. storm water box culvert in Eccles WwTW.

E5

5

DRS

01/11/2011

LC 31/01/13 ZM

06/09/2012

LC 14/02/14

UU asset - 1240 x 1240 final effluent box culvert. Removal of section to form new chamber

Section of culvert requires removal to form new chamber.Continuous final effluent flows within culvert may result in rapid inundation of excavations or working areas if flows not dealt with effectively during removal of culvert. Inadequate measures to deal with flows will result in failure of the treatment process and potential for flooding of the WwTW.

Obtain record information for structure. Undertake surveys to confirm condition of culvert. Install suitable measures to deal with flows during culvert removal.

1240 x 1240 r.c. final effluent box culvert in Eccles WwTW.

E6

6

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

UU asset - 1240 x 1240 FE and 3 x 2 storm water box culvert founded on piles. Tunnel S2 - S3 crossing below culvert

Tunnelling below will result in ground movement or vibration potentially resulting in instability, structural defects, partial or full structural failure.Continuous final effluent flows within culvert may result in rapid inundation of excavations or working areas if flows not constrained within culvert due to structural failure. Inadequate measures to deal with flows will result in failure of the treatment process and potential for flooding of the WwTW. Flows escaping from culvert may result in erosion of ground above tunnel.

Obtain record information for structure. Undertake surveys to confirm condition of culverts, wall thickness rebar etc. Determine structural capacity of culverts and ability to resist ground movement. Install appropriate support during tunnelling to maintain integrity of culvert during tunnelling.

1240 x 1240 r.c. final effluent box culvert and 3 x 2 storm culvert in Eccles WwTW.

E7

7

DRS

01/11/2011

LC 31/01/13 ZM

06/09/2012

LC 14/02/14

FTFT culvert below main access road (linking inlet channel to primary settlement tanks).

Structural capacity of culverts unknown. If main access is used for alternative construction access then structural failure may occur is structural capacity of culvert is exceeded. Failure of culvert would lead to flooding, injury.

Obtain record information for structure. Confirm structural capacity prior to use as a construction access route.

Alternative construction access (along main WwTW access road) to Shaft 03.

E8

8

DRS

01/11/2011

LC 31/01/13 ZM

06/09/2012

LC 14/02/14

Eccles WwTW - Ex Filter beds (northern bank) and final settlement tanks - deep excavations for pipelines and shafts in close proximity to these structures.

Failure of excavation support or impact from construction plant may result in structural damage or damage/entanglement to mechanical equipment. Damage may result in failure of treatment process, flooding, injury.

Obtain record information for structures. Design and implement robust ground support to excavations. Install adequate fencing to working area boundaries.

Eccles WwTW - Ex Filter beds (northern bank) and final settlement tanks

E9

9

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Tunnelling in close proximity to Salford City Community Stadium - South Stand

Ground movement or vibration resulting in instability, structural defects, partial or full structural failure.Note: South stand founded on ground bearing slab. Only north stand is founded on piles.

Obtain records. Undertake pre- and post- construction structural assessments as appropriate. Undertake GI and other SI to obtain relevant information to be able to design and undertake tunnelling works in a manner to minimise vibration and ground movement. Avoid affecting structures by design if possible. Provide sufficient working space around structures to avoid impact damage or undermining and provide sufficient space in case surface intervention to TBM is required. Undertake appropriate monitoring during the works. Set allowable settlement and vibration limits.

Salford City Community Stadium - South Stand

E10

10

DRS

01/11/2011

LC 31/01/13 ZM

06/09/2012

LC 14/02/14

Tunnelling in close proximity to Barton Locks Ground movement or vibration resulting in instability, structural defects, partial or full structural failure.

Obtain records. Undertake pre- and post- construction structural assessments as appropriate. Undertake GI and other SI to obtain relevant information to be able to design and undertake shaft construction and tunnelling works in a manner to minimise vibration and ground movement. Avoid affecting structures by design if possible. Provide sufficient working space around structures to avoid impact damage or undermining and provide sufficient space in case surface intervention to TBM is required. Undertake appropriate monitoring during the works. Set allowable settlement and vibration limits.

Barton Locks


Capital Delivery

E11

11

DRS

01/11/2011

LC 31/01/13 ZM

06/09/2012

LC 14/02/14

Tunnelling in close proximity ex. Salteye Brook Outfall Structure. Traversing plant across Salteye Brook Outfall Structure. (note the outfall structure forms a bridge across the brook).

Ground movement or vibration resulting in instability, structural defects, partial or full structural failure.Instability, structural defects, partial or full structural failure resulting from exceeding safe weight limit for vehicles crossing the bridge.Failure of assets fixed to or laid across bridge - 24" trunk water main and Virgin Media cables (see Services section above)

Obtain records. Undertake pre- and post- construction structural assessments as appropriate. Undertake GI and other SI to obtain relevant information to be able to design and undertake tunnelling works in a manner to minimise vibration and ground movement. Avoid affecting structures by design if possible. Provide sufficient working space around structures to avoid impact damage or undermining and provide sufficient space in case surface intervention to TBM is required. Undertake appropriate monitoring during the works. Set allowable settlement and vibration limits.Obtain SWL of bridge from MSC Operations Team. If this information is not available then undertake assessment of SWL of bridge. Where appropriate, instigate procedures to limit weight of vehicles crossing bridge.

Salteye Brook Outfall structure and associated services.

E12

12

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Tunnelling in close proximity to earth bank of MSC . Shaft and outfall construction next to and within the bank of the MSC .

Ground movement or vibration resulting in instability, defects, partial or full slope failure.Failure of assets fixed to or laid across bridge - 24" trunk water main and Virgin Media cables (see Services section above)

Obtain records. Undertake pre- and post- construction condition assessments as appropriate. Undertake GI and other SI to obtain relevant information to be able to design and undertake shaft construction, tunnelling works, outfall wall and outfall channel formation in a manner to minimise vibration and ground movement. Avoid affecting structures by design if possible. Provide sufficient working space around structures to avoid impact damage or undermining and provide sufficient space in case surface intervention to TBM is required. Undertake appropriate monitoring during the works. Set allowable settlement and vibration limits.

Banks of MSC

0

DRS

01/11/2011Is structure a Workplace? No No further action proposed unless design

changes to incorporate workplaces

0

LC

12/11/2015Construction adjacent to existing 1980 brick sewer

Possibilty of ground settlements and damage to existing brick sewer

Review the temporary works required for tconstruction of the CSO

SAL 0018 CSO

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WORKING NEAR BODY OF WATERPerceived consequences Actions to be considered "Structure"/ location considered to be

At Risk.

F1

1

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

History of flooding from watercourses and potential flooding from MSC

Inundation, injury, drowning. Implications on flotation of pipelines and structures. Pollution and contamination of floodwaters by construction materials, fuels etc.

Obtain flood risk data from EA. Include data in PCI and design criteria

All working areas and structures within defined floodplain

F2

2

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

History of flooding from sewer network Inundation, injury, drowning. Implications on flotation of pipelines and structures. Disease/infection from sewage contaminated floodwater

Obtain flooding records. Obtain flooding and surcharge data from UU network modelling team. Include data in PCI, SSB and design criteria.Provide data on flood defences (Note Peel Green Rd DG5 properties protected by earth flood bund and NRV).

Properties on DG5 register on Peel Green Road.

F3

3

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Watercourses, reservoirs, rivers, canals, lakes, lagoons

Injury, drowning. Inundation of excavations. Unstable excavations. Rapid variations in water table.

Avoid working immediately adjacent to, or within, water bodies. Provide adequate space within working areas next to water bodies. Provide information on water bodies within PCI. Avoid works that will affect stability of banks or retaining structures. If this is not practicable ensure works do not adversely affect stability of banks or retaining structures.Monitor weather and water levels on a regular basis.Provide appropriate rescue and working apparatus.

MSC - tunnelling, shaft and outfall constructionSalteye Brook - tunnel constructionFormer sludge lagoon - excavations at toe of bund and surveying

F4

4

LC 31/01/13 LC 14/02/14 Strong underwater currents and differential pressures

Injury, drowning. Strong currents may be present downstream of Barton Locks due to operation of locks and sluices and flows entering MSC from Salteye Brook.Differential pressures may be present downstream of Barton Locks due to operation of locks and sluices

Engagement with MSC Operations Team.Monitor weather and water levels.Monitor operation of locks and sluices

Tunnel crossing of Salteye BrookFormation of outfall to MSC (diving operations)

F55

LC 31/01/13 LC 14/02/14 Open storage tanks Falls into tanks, injury, drowning Provide info in PCI and design working areas to avoid open tanks. Provide adequate fencing to working areas adjacent to tanks.

Final tanks and storm tanks

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Sequence of Construction


Risk.

G1

1

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Removal of existing 3300x2200 culvert and supporting piles to allow tunnel S2 - S3 to be constructed. Measures for dealing with storm flows must be in place.Culvert cannot be abandoned until flows can be turned into outfall tunnel.

Inundation of excavations, existing WwTW and flooding upstream.Injury, drowning.TBM becoming 'stuck' if piles not removed potentially resulting in over-excavation and settlement/collapse of culvert structure above.Unplanned surface intervention required to remove piles.

Temporary diversions, construction of d/s sections of new outfall first. Constraint in SSB

WwtW and upstream properties

G2

2

DRS

01/11/2011

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Restricted working space at Shaft 01 working area - insufficient space to construct shaft and CSO/pipework concurrently

Injury due to confined working area, damage to adjacent properties or M'way slip road.

Programme the work sto take into account restricted working area.

New SAL0018 CSO structure and Shaft 01

G3

3

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Connections of existing sewer network to new sewers, pipelines, shaft sand tunnels

Flooding, injury, drowning and pollution. SAL0018 CSO - flows at new SAL008 shall not be able to discharge to new tunnels and shafts until all tunnels and shafts complete.Eccles WwTW - storm and final effluent flows shall not be able to discharge to new tunnels and shafts until all tunnels and shafts complete.Peel Green Rd (1200NB) - flows shall not be able to discharge to new pipework until all downstream, pipework, tunnels and shafts complete.Peel Green Rd WwPS - discharge bellmouths set at design levels. Connection of discharge pipework to ex sewers shall not be made until all downstream, pipework, tunnels and shafts complete.

All new assets.WwTWUpstream properties

G4

4

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Installation of new screens Increase in water levels leading to flooding, injury drowning.Damage to new screensPollution

New SAL0018 - flows can only be turned into new chamber (c/w new screens) once all outfall tunnels etc that convey spill flows are completed Ex WwTW Inlet CSO - screens can only be installed once all downstream pipelines, culverts, shafts, tunnels, etc are completed.

New SAL0018Eccles WwTW Inlet CSO

G5

5

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Formation of outfall channel and connection of new outfall tunnel to MSC.

Rapid inundation, injury drowning. Upstream flooding. Pollution.

All tunnelling works and shaft fit shall be completed prior to forming connection to MSC. Shaft 04 stop gates shall be fully tested and commissioned prior to forming connection to MSC.

All new tunnels and shafts.Upstream properties and WwTW

G6

6

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Access off M60 JN11 roundabout not available until all WGIS JN11 improvement works have been completed.

Increased risk of collisions, injury without roundabout improvements.

Programme works to take into account completion date for WGIS Jn11 works.


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Access


Risk.

H1

1

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Rights of Way Conflict with PROW users resulting in injury. If practicable use alternative routes/working areas avoiding PROW.Provide PROW diversion.Manage interface between vehicles and PROW users.

Shaft 04/Outfall access.

H2

2

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Common access - Shaft 01 Alleyway Collision with pedestrians or residents using alley for pedestrian or vehicular access. Injury or damage to property/vehicles.

Provide more suitable alternative access.Limit number of construction vehicles using access.Instigate vehicle control measures as appropriate.

Access to Shaft 01 working area

H3

3

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Common access - Shaft 04 access Access may be shared with MSC operatives accessing Barton Locks and 3rd party contractors engaged in Port Salford development.Collision, injury.

Liaise with MSC operations team.Liaise with Port Salford development team and contractors.Instigate vehicle control measures as appropriate.

Shaft 04/Outfall access.

H4

4

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Common access - Eccles WwTW Access shared with UU operatives and staff with increased risk of collision, injury.Crossing of existing culverts and structures with WwTW - possible weight restrictions (see Adjacent Structures section above).

Liaise with WwTW management.Instigate vehicle control measures as appropriate.

Eccles WwTW


Capital Delivery

H5

5

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Access limiting conditions - Shaft 01 working area.

Residential roads/alleyway not suitable for construction access.Collision, injury, damage to roads and 3rd party property.Alleyway not suitable for large maintenance access vehicles (ie Disab).

Agree access of M60 slip road, Jn11 roundabout and egress to A57 with HA/BBMM (ASC)/SCC/UV.Comply with requirements of 3rd parties. Develop construction traffic routing/management plansDevelop and implement proposals for safely diverting or managing pedestrians at interfaces with construction traffic


H6

6

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Access limiting conditions - Shaft 02 working area.

Residential roads linking Peel Green Rd and Liverpool Rd with the working area are relatively narrow with restricted turning space at junctions. Significant on-street parking and roads designated as 'Play Streets'.Risk of collision, injury, damage to roads and 3rd party property.Deliveries of large items of plant/materials will not be feasible through the residential streets

Autotrack plant movements around streets to confirm whether access possible. Consider access of M60 slip road or through WwTW for construction accessInstigate appropriate construction vehicle management/routing plans.


H7

7

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 23/06/15

Exceptional loads. Some plant required to construct the works may be considered to be exceptional (eg cranes, TBM etc).Some materials required for the works may be considered to be exceptional (eg shaft roof slabs).Access through the residential streets serving the working areas will be feasible.Risk of collision, injury, damage to roads and 3rd party property.

Select/design plant and design works to take into account restricted access.Identify alternative access to working areas for exceptional items (eg M60 slip roads). Consider precast panels for the CSO roof slab

Shaft 01 and Shaft 02 working areas. Salteye Brook Culverts. SAL0018 CSO

H8

8

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Poor sight lines Increased risk of accidents, injuries. Design site access to provide adequate sight lines.Engage specialist highways/traffic engineering consultants in the design of accessesLiaise with local highway authority and comply with their requirementsConsider whether risk can be mitigated through traffic management measures.

Shaft 01 working area (M60 JN11) and Shaft 04 working area (A57) accesses.

H9

9

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Permanent or temporary lifting arrangements / hooks etc.

Insufficient space for plant required for pump removal.Insufficient space for plant required for man rider basket use.Insufficient space for maintenance vehicles to manoeuvre.Unsuitable surfaces for setting up lifting equipment.Risk of collision, injury, damage to roads and 3rd party property. Unable to maintain assets regularly and safely.

Determine weights of pumps, screens, stop gates, man riding baskets, valves etc and confirm craneage requirements. Determine whether mobile cranes etc can access assets - Autotrack vehiclesConfirm with UU Ops lifting requirements. Consider man access requirements and whether 2 no. man rider access is required.Consider planning implications for access arrangements.

Shaft 01, Shaft 02, Shaft 03, Surcharge relief chamber (WwTW), Eccles Inlet CSO, New SAL0018, Peel Gn Rd WwPS, Shaft 04/MSC outfall

H10

10

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Traffic flows and speed - M60 Shaft 01/Shaft 02 working areas sited next to M60 JN11.Access to working areas required off M60 Slip roads.Tunnelling under M60 will require monitoring of carriageway settlement and access to assets with access points on slip roadsAccess to M60 may only be possible during nightimeRisk of collisions, accidents, injuries.

Consultation with HA/BBMM re access off slip roads and access to M60 for surveying. Comply with HA/BBMM requirements and obtain necessary approvals.Appropriate traffic management and use of Sch 12 TM contractors for TM on M60.

Shaft 01 and Shaft 02 working areas

H11

11

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Traffic flows and speed - A57 (Barton) Shaft 04 access off 50mph limit dual carriageway is existing access to Barton Locks.Construction vehicles slowing down to enter access and slow vehicles turning out of access onto carriageway. No dedicated lanes for speeding up/slowing down.Restricted sight lines.Risk of collision, injury.

Consultation with highway authority. Comply with highway authority requirements and obtain necessary approvals.Use of appropriate traffic management.Obtain temporary order to restrict speed limit on road.Undertake improvements to access and improve sight lines.

Shaft 04 working area access

H12

12

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Parking facilities or restrictions Limited available parking space for construction operatives vehicles within working areas or on adjacent residential streets.Parking vehicles may reduce visibility, access etc with an increase risk of collision, injury or damage to 3rd party property.

Impose no parking restrictions on operatives vehicles within residential streetsProvide adequate parking at main WwTW compoundInvestigate 'bussing' operatives to satellite work areas from main WwTW site compound

WwtW, Shaft 01, Shaft 02, Peel Green Rd

H13

13

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Restricted access to Residential Properties Residents unable to access properties on foot or with wheelchairs etc.Residents unable to access properties to park vehicles etcResidents unable to access properties to undertake maintenance, refuse removal etcEmergency services unable to access residential properties.Risks of injury, accidents, public health issues, damage to 3rd party property.

Design working areas maintain pedestrian and vehicular access to front and rear of properties.Where this is not practicable maintain pedestrian access and make appropriate alternative arrangements for parking and refuse collections.Liaise with residents to understand their requirements (disabilities, elderly, young children etc).Ensure access is suitable (ie for disabled, push chairs etc).

Shaft 01, Shaft 02, Peel Green Rd

0

DRS

29/10/13Access into filters requires removal of edge protection

0 Dimensional Restrictions

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Section J

Interfaces


Risk.

0

DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Are special arrangements needed for the removal / control of livestock

J1

1

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Events:Rugby matches at Salford City StadiumFootball matches and other events at Etihad Stadium and Old TraffordEvents at MENChristmas shopping at Trafford Centre

Significant increase in pedestrian and vehicle flows.Embargoes imposed on closures or roadworks on M60 and A57.Increase in on-street parking.Increased risk of accidents, injuries, delays to construction vehicles accessing the sites.Access arrangements to sites may not be available.

Obtain details of events and embargoes from relevant authorities/organisations.Ensure working areas adequately fenced/secure.

All working areas.

J2

2

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Operation & Maintenance of existing assets Restricting on-going UU Ops activities on WwTW resulting in failure of equipment and failing to meet WQ standards. Increased risk of flooding and pollution.Restricting access for UU Operations to existing sewer network for maintenance/inspection resulting in increased risk of flooding and pollution.Restricting access for MSC operatives to Barton Locks resulting in disruption to shipping and increased risk of floodingRestricting access for motorway maintenance operatives resulting in failure of communication/lighting systems with associated increased risk of accidents.

Liaise with affected 3rd parties to understand requirements.Design working areas to allow access.Include for access provision with contract documents.

Eccles WwTW, M60 and local road network, existing sewer network, Barton Locks

J3

3

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Inter-dependence with others Access to working Shaft 01 working area will not be available until M60 JN11 WGIS works are complete. Possible delays to works.

Liaison with WGIS contractor and highways authority.


J4

4

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13Inter-dependence with others Diversion of services in order to construct

works.Liaison with statutory undertakers Shaft 01 working area, Shaft 04 working area

and Peel Green Rd

J5

5

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13Neighbouring properties Residential properties immediately adjacent to

Shaft 01, Shaft 02 and Peel Gn Rd working areas. Properties are at risk of noise, dust, vibration, ground movement, night-time working, impact from plant, restricted access and restricted parking.Refer to other specific items covering these hazards.

Refer to other specific items covering these hazards.

Shaft 01, Shaft 02 and Peel Green Rd working areas

J6

6

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Works Authorisations / Isolation interfaces / restricted operations - WwTW FE

Flows in FE culvert can be temporarily stopped using storm tanks and re-circ PS. This facility may be required to undertake works on FE culvert. If not controlled by UU Ops then there is a risk of the failure of the treatment process, increased risk of flooding, risk of pollution and risk of inundation of excavations.

Agree procedure with UU Ops and include in SSB

Eccles WwTW FE culvert


Capital Delivery

J7

7

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Works Authorisations / Isolation interfaces / restricted operations - access to sewerage network

UU procedure for accessing UU assets should be followed with authorisations signed off by relevant UU Ops representative. Failure to following procedure could lead to injury, drowning, electrocution, entanglement in mech plant.

Agree procedure with UU Ops and include in SSB

Eccles WwTW and all sewer network assets

J8

8

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Other Contracts: Potentially other contracts on going in close proximity:Peel Holdings - WGIS road west of WwTW boundary and at JN11 M60 Peel Holdings/Salford development of site to west of M60 Highways Agency - M60 Managed M'way Service diversion contracts for the UID scheme, Port Salford and WGIS

All will involve works being undertaken concurrently, and in close proximity to the UID scheme works. Increased risk of injuries or damage to works due to loading or impacts from 3rd party construction plant.

Liaison with 3rd parties.Effective programming where possible to avoid conflict with other schemesInclude constraints within SSB

WwTW, Shaft 01 working area, tunnel S3 - S4, Shaft 04/Outfall, new 2000NB sewer below WGIS rd

J9

9

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Aeroplanes or flight paths Barton aerodrome to west of site - all sites potentially on flight path.Risk of planes/helicopters colliding with jibs on cranes.

Liaison with Aerodrome re any specific requirements or restrictions.Under Civil Aviation law, companies and contractors who need to operate cranes and lifting equipment within 6 km of an aerodrome boundary, at heights of more than 10 metres above ground level (AGL) or that of surrounding structures or trees, if higher, must receive prior permission from the aerodrome operator.

All work areas.

DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Network Rail

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Chemical deliveries once weekly

J10

10

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Delivery of materials to site; lack of turning space

Limited space at SAL0018 and Rooke St - accidents, injury damage to property

Design, where possible to allow deliveries to enter and exit sites without turning. If turning required make sure there is sufficient space for safe turning.

SAL0018, Rooke St

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Smoking Pursue purchase of No 9 Laburnum Road

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Section K

CONFINED SPACE WORKING


Risk.

K1

1

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Existing confined spaces? Entrapment, suffocation, explosions, fire,

drowning

provide exiting means during an emergency,

ventilation, adequate lighting and PPE

Existing incoming 1980mm brick barrel sewer,

spill structure and CSO chamber

Ex sewers and chambers on WwTW and within

Peel Green Rd

Internal column access in piers on Barton HLB

2

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRG

29/10/13

LC 14/02/14

LC

12/10/2015

Are there proposed confined spaces? Entrapment, suffocation, explosions, fire,

drowning

Design out where possible.

Provide access ladders, intermediate landing,

signage, grilles, safety chains, handrailing as

per UU signature Designs and Standards

Undertake HAZOPs for all new assets and

alterations to ex assets

Prepare maintenance strategy f

New shafts, tunnels, manholes , sewers, CSO

chambers. New 1800 sleeve pipe at Peel

Green Road

K3

3

LC 31/01/13 LC 14/02/14 Access to remove Brick Stank within existing

2300 NB Brick Sewer connecting into Existing

Eccles WwTW Outfall Chamber

Entrapment, suffocation, explosions, fire,

drowning

The existing Brick Stank is to be removed on

completion of the upstream works to install the

2m dimater sewer from Eccles WwTW CSO.

Provide suitable access on Outfall Chamber

roof slab

2300 NB Brick Sewer upstream of Eccles

WwTW Outfall Chamber

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Working at heights


Risk.

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Work near cliff top

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Pipe bridges

L1

1

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Ex and new deep shafts and chambers Falls, injuries Follow approved access procedures for ex assets Design out where possible.Design to UU 'Designing for Safety' for barriers, access etcHAZOPsProvide maintenance plan for non-standard deep shafts

Shafts, CSO chamber, manholes

0

DRS

29/10/13

DRS

29/10/13

DRS

29/10/13

LC

12/11/2015

Roof work; intallation of access upstands, grilles, access covers

Falls, injuries Consider precast upstands to avoid working over large opening. Site to review the temporary works required

Shafts, CSO chamber, manholes

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Filter units when empty

L2

2

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Barton High Level Viaduct Falls, injuries Follow approved HA & BBMM access procedures access to bridge for inspections and installing monitoring instrumentation.Manage access through RAMS

Barton High Level Viaduct - Installing and Maintaining Monitoring. Bridge Assessment inspections.

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Demolition, refurbishment, repair


Risk.

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Prestressed structures or elements

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Instability issues

Ref

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Section N

Welfare /Security / Emergency

Arrangements


Risk.

N1

1

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Security system /existing security concerns Unauthorised entry onto the site, potential for injuries, damage and theft

Review of ex security arrangements, gates and fencing appropriate for level of risk of unauthorised entry

Eccles WwTW, Shaft 01, Shaft 02, Shaft 04 and Peel Green Rd

N2

2

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Vandalism Potential for injuries, damage and delays to programme

Review of ex security arrangements, gates and fencing appropriate for level of risk of vandalism

Eccles WwTW, Shaft 01, Shaft 02, Shaft 04 and Peel Green Rd

0

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Temporary emergency procedures Entrapment, suffocation, explosions, fire, drowning

0

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Does the contract affect partitioned fire emergency exit routes

0DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Are fire assembly areas disrupted

0

DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Have fire assembly access routes been accommodated

N3

3

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Are services available for use by the contractor? (e.g. Sewer, power, water connections

Injury, Diseases Contact service providers and make arrangements for provision of connections.

All work areas.

N4

4

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Have fire assembly access routes been accommodated

Injury, closure of facilities Ensure that working arrangements accommodate all known emergency access routes

Eccles WwTW and Salford City Stadium emergency access/egress to rear of stadium (across tunnel line)

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Occupational Health


Risk.

P1

1

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Biological Hazard Working in live sewers - leptospirosis Avoid working in live sewers where possibleUse appropriate PPE.

All work areas.

P2

2

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Burning or cutting Injury Consider use of non-manual methodsUse appropriate PPE

All work areas.

P3

3

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Manual Handling - heavy building elements Muscular skeletal injury Consider use of non-manual methodsDesign out manual handling issues where possible both in construction and operation of permanent works

All work areas.

P4

4

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Noise Diseases - long term hearing impairment Consider use of low noise methods (eg Giken piling)Use appropriate PPE

All work areas.

P5

5

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Vibration Diseases - vibrosis Consider use of low vibration methods (eg Giken piling, mechanised breaking equipment)Use appropriate PPE

All work areas.

P6

6

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Dust and fibres Diseases - lung infection Use appropriate PPE All work areas.

P7

7

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Fumes Diseases -eye and lung infection Use appropriate PPEConsider alternatives to equipment that produce fumes (eg fixed power supply)

All work areas.

0

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Difficult working position / ergonomics possible depending on method of media removal

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Section Q

Environmental issues affecting H &S or

Welfare


Risk.

0

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Giant hogweed and or Wild Parsnip

0

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Adders


Capital Delivery

Q1

1

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Insects Diseases Appropriate PPE and welfare procedures Eccles WwTW - Flies on filter beds

0

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Wildlife risks

0

Ref

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Other significant hazards not identified

elsewhere


Risk.

R1

1

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Foamed concrete production of explosive gasses Assess use prior incorporation within works All works area - chambers and sewers to be abandoned

R2

2

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Diving Operations Drowning, muscular skeletal injuries from impacts or differential pressures

Avoid diving operations where possible through design.Plan dives correctly and follow UU standard guidance on diving ops.Obtain relevant information on hazards within water bodies - ie sluices, underwater currents, vessels

Outfall structure

R3

3

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Hot works Injury, fire Avoid hot works where possible.Plan works and use appropriate PPE

All work areas.

0

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

NDT (including X-rays)

R4

4

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Projecting elements e.g.fish tail anchors Injury Appropriate PPE and warning/demarcation of projecting elements

All work areas.

0

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Explosives

0

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Highly flammable substances

0

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Removal of media from the filters

R5

5

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Waste removal Land contamination ,pollution of watercourses and groundwaters.Contact with hazardous substances, ingestion, inhalation, absorption leading to infections

Appropriate GI, assessment of materials to be excavated.Put in place SWMP, MMP and ECP.Use of appropriate excavation methods and use of appropriate PPE

All work areas.

NNDRS 29/10/13NDRS 29/10/13DRS

29/10/13

DRS

29/10/13

DRS

29/10/13Change of use of equipment

Ref

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Section S

Review of existing documentation and & of

facilities on site

Comment on suitability or perceived

consequences of missing information

Actions to be considered "Structure"/ location considered to be At

Risk.

S1 1DRS

29/10/13

DRS

29/10/13

DRS

29/10/13 H&S File information No available H&S File information Obtain available records and Eccles WwTW

S2

2

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

DSEAR and PEAZ PEAZ study undertaken for project Review and update PEAZ as required. All work areas.

S3

3

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Existing Emergency arrangements - e.g. Fire risk / evacuation plan, site emergency rules.

Injury, death, damage Obtain existing site procedures and include in site inductions and in planning of work activities and site set-up.

Eccles WwTW, works within 3rd party construction sites

S4

4

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Existing site traffic management plan Injury, death, damage Obtain existing site procedures and include in site inductions and in planning of work activities and site set-up.

Eccles WwTW, works within 3rd party construction sites

S5

5

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Asbestos survey reports Limited asbestos report for WwTW available Review report, identify limitations and undertake any further surveys as required. Include reports in PCI

Eccles WwTW

0

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Existing welfare facilities

S6

6

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Existing ALM reviews Injury Undertake ALM as part of design process All structures

S7

7

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Existing HAZID Study ReportExisting SIF (Safety Instrumented Functions) and SIL (Safety Integrity Level) Reviews

Injury, incorrect operation Undertake HAZID, SIF, SIL as part of design process

All structures

S8

8

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Existing Fire Risk review Injury, operational issues Undertake Fire Risk review as part of design processReview any ex facilities where temporary connections to be made (eg TBM power supply)

All structures with M&E installations

S9

9

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Existing HAZOP reports Injury, operational issues No ex Hazop. Undertake HAZOP as part of design process and update and review as appropriate through detailed design and construction.

S10

10

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Drawings Unable to design and plan works effectively Review scanned archive and investigate other sources (incl 3rd parties) to obtain available record dwgs. Review "as built drawings" for existing structures CSO and sewers and carry out asset surveys to confirm their configuration and condition. Include relevant information of design dwgs and PCI.

All existing sewers and structures (UU assets)All relevant 3rd party assets (eg HA structures)

S11

11

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

O & M manuals Unable to design and plan works effectively Obtain any available O&M manuals. Confirm O&M of ex equipment with operational staff

Eccles WwTW.MSCM60

S12

12

DRS

29/10/13

DRS

29/10/13

LC 31/01/13

DRS

29/10/13

LC 14/02/14

Existing SI reports or Asset surveys Unable to design and plan works effectively Obtain all relevant available records including 3rd party records.Review available information and identify any further surveys required to effectively design and construct works.

All works areas.

Ref

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Section T

Hazards identified during Specific

Functional Reviews on project (See cell

comment)


Risk.

0

LC

04/06/2014 Discharge Chamber at Peel Green Road Potential H & S issue if flow is not isolated

prior to entryWarning signs to be fitted to chamber access shaft wall or safety grille if fitted immediately below access cover

Peel Green Road PS Discharge chamber

0

LC

04/06/2014 Access to manhole PGR 7 when penstock operation or removal is required

Potentially muddy/slippy areas/dangerous access

Manhole PGR 7 relocated close to an existing footpath and 1m hardstanding provided around the access cover

Peel Green Road PS

0

LC

04/06/2014 Removal of pumps from PS to a vehicle parked in the lay-by

Potential H & S issue trolleying pumps weighing approx. 200kg each

Extend vehicle access to the edge of the pumping station

Peel Green Road PS

0

LC

04/06/2014 Pressure build up within the PS discharge chamber

Potential damage from pressure build No action required. There is enough ventilation within the chamber via non sealed access cover and sewer and upstream chambers.


0

LC

04/06/2014 Unacceptable noise levels within the discharge chamber

Noise levels could potentially cause complaints from local residents

No action required. The permanent solution will have up-turned bellmouths discharging via sloped benching down to the invert. The 'mushroom' flow out of the bellmouths will ensure that the noise levels are kept to a minimum


0000000000

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Section Z

Hazards identified at late stages of Project


Risk.

Z11

LC

12/11/2015 Installation of concrete upstands, grilles, access covers over large openings

Falls, injuries Consider precast upstands to avoid working over large opening. Site to review the temporary works required

SAL 0018 CSO

Z22

LC

12/11/2015 Confined Spaces Working in 1800 sleeve pipe during tunelling works

Entrapment, suffocation, explosions, fire,

drowning

Entry procedures and gas monitoring Peel Green Road (1200 sewer)

Z33

LC

12/11/2015 Possibilty of 'cathing' edge of existing 1980 brick sewer due to sheet pile tolerances; Possibility of ground settlements

Damage to existing structure; unsuccessful installation of sheet piles to design levels

Review the temporary works required for tconstruction of the CSO. Consider moving the CSO away from the existing brick sewer

SAL 0018 CSO

000000


Capital Delivery

Hazard and Risk Management System (HARMS) Workbook -- Review Sheet

Date: 12 November 2015

R5 S12 T0 Z3

Click to sort sheet Click to adjust row height for text Click to add row

Risk

Ref

Location affected and Identified Hazard Perceived consequences

+ Actions to be considered

Mitigation Measures and Design

Assumptions at time of assessment

Revised Risk Risk status:

S if

Significant

Date of this

assessment

Designer (Name &

Discipline)

Person(s)

affected

Description of Residual Issues, Hazards or Risks

(including details of any Hazardous Materials assumed

to be included in the design)

Information to be provided about the

residual hazards - include drawing or

document references.

Detailed design

to include SHE

box on

drawings?

Potentially

include this

item in H&S

File? (Y/N)

A1 Area: All excavations. High Risk - all tunnels and shafts.

SAL 0018 CSO, Peel Green Road

Hazard: Unstable strata formations - excavations within

made ground, water logged sands/gavels and made

ground

Risk: Trench/excavation collapse, stability of

structures.

Action: Properly specified and designed TBM,

ground support, de-watering and application of

appropriate site controls.

Appropriate GI undertaken along line of tunnels

and scope confirmed with specialist consultants

and contractors.

GBR prepared on basis of GI.

All available historical GI obtained and relevant

GI from 3rd parties

Contract docs prepared to reflect GI findings.

PCI includes all relevant GI. Procurement

process included rigorous assessment that

appropriate TBMs and methodologies selected

for tunnelling and appropriate methodologies

adopted for shaft construction.

Risk and constructability workshops and reviews

undertaken. Site to review the temporary works

and provide a safe system of work. Monitor and

control rate of excavation/ground movement and

sufface settlement

Significant

S

29/10/2013

23/06/2015

12/11/2015

D Sephton - Civil Engineering

Lloyd Chapeyama Civil

Engineering

Contractors

Visitors

Public

Risk of tunnel collapse and/or excessive settlement

leading to damage to 3rd party assets.

Possibility of damage to existing 1980 brick sewer or

undermining the structure

SSB, PCI and Significant Hazard Dwgs:

DG5053/80023696/00/98/1001

7570/80023696/00/98/1002

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

G5053/80023696/01/01/20101

DG5053/80023696/01/11/20112

DG5053/80023696/01/11/20113

DG5053/80023696/01/11/20116

SAL0018/80023696/01/12/21030

SAL0018/80023696/01/12/21040

SAL0018/80023696/01/12/21041

SAL0018/80023696/01/12/21042

Y N

A10 Area: Abandoned 2300 and 1770x1150 sewers within

WwTW. Abandoned trunk sewer in Peel Green Rd

(entrance to WwTW).

Hazard: Existing abandoned underground structures

Risk: Stability of structure and surrounding

ground. Existing structure may contain

groundwater/sludge/pockets of gas..

Action: Desk top studies to identify structures

and available records.Trial holes. Control

through method statements. Existing buried

pipes to be broken out to allow construction

Available records obtained.

TH undertaken to confirm location and

size/construction. Existing abndoned sewers will

be broken out to enable construction

Significant

S

29/10/2013

23/06/2015



Engineering

Contractors Unstable existing structures leading to collapse of

excavation.

Abandoned sewer/structures/pipes not filled/grouted up

and filled with groundwater leading to rapid inundation of

excavations.

Unknown materials with ex structures etc that may be

hazardous

Buried obstructions if trenchless techniques used. May

contain sludge/pockets of gas. Unexpected obstructions.

Restricted working space due to buried structures


DG5053/80023696/00/98/1001

7570/80023696/00/98/1002

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

7570/80023696/01/17/20002

7570/80023696/01/17/20003

7570/80023696/01/17/20004

7570/80023696/01/17/20005

7570/80023696/01/17/20007

7570/80023696/01/17/20008

7570/80023696/01/14/20009

DG5053/80023696/01/01/20101

DG5053/80023696/01/11/20112

DG5053/80023696/01/11/20113

DG5053/80023696/01/11/20116

Y N

A11 Area: Tunnel S3 to S4

Hazard: Uncharted test piles for Barton HLB

Risk: Test piles encountered by TBM below

Barton HLB leading to over excavation and

increased risk of ground movement.

Intervention required below bridge to remove

piles..

Action: Obtain records from HA.

Undertake non-intrusive SI to confirm route free

of piles.

Consider TH below BHLB if non-intrusive

methods prove inconclusive.

If piles are found then inform HA and enter into

process to obtain agreement to method for pile

removal.

Available records obtained.

Non-intrusive SI undertaken.

Intrusive TH to be carried out (to be agreed with

HA) and any piles removed prior to tunnelling

commencing (pile removal to be agreed with HA)

Significant

S

29/10/13 D Sephton - Civil Engineering Contractors

Public

Visitors

Risk of TBM striking uncharted piles resulting in excessive

ground movement and excavation from surface to TBM

face to remove piles.


SAL0018/80023696/00/98/1002

A12 Area: Tunnel S2 to S3 at Shaft 02 working area.

Hazard: Piles to bases of former o/h electricity pylon.

Risk: Piles encountered by TBM leading to over

excavation and increased risk of ground

movement. Intervention required to remove

piles..

Action: Obtain historical records from Statutory

undertakers.

Undertake TH to confirm pile location sand

undertake tests to confirm length of pile and

whether it affects tunnel.

If piles are found to affect the tunnel then

agree methodology for removal with relevant

authorities.

Obtain available records.

TH and testing to confirm length of pile

undertaken

Low 29/10/13 D Sephton - Civil Engineering Contractors

Piles

Visitors

If pile is longer than testing data suggests then obstruction

to tunnel potentially leading to over-excavation and

associated increased ground movement. Surface

intervention required to remove pile.

SSB, PCI

A2 Area: Tunnels S01 to S02, and S02 to S03, Shaft 01,

Shaft 02, new 2m diameter sewer next to former sludge

lagoon, new outfall to MSC.

Hazard: Unstable slopes on the land

Risk: Failure of embankments.

Action: Carry out appropriate GI, properly

designed permanated and temporary works to

limit movements of embankments and

surcharge loads imposed on new structures.

Design pipe away from sludge lagoon


and pipelines and scope confirmed with

specialist consultants and contractors.



GI from 3rd parties


PCI includes all relevant GI.

Procurement process included rigorous

assessment that appropriate TBMs and

methodologies selected for tunnelling and

appropriate methodologies adopted for shaft

construction and pipeline construction.


undertaken.

Significant

S


Visitors

Public

UU Operatives

Risk of failure of former sludge lagoon embankment. SSB, PCI and Significant Hazard Dwgs:

7570/80023696/00/98/1002

For each section, insert numbers in column A, to the maximum value as noted above and right

(The next two columns will auto fill with data from the HIC sheet)If risk is considered as Significant

(Status S), click arrow and add

information to cells as headings

Project Name: Man Trunk UIDs - SAL0018 Project number: 80023696Version: See BC Version

Last section numbers: A12 B11 C13 D19 E12 F5 G6 H13 J10 K3 L2 M0 N4 P7 Q1

return to main sheet

Guidance

The ACOP requires information to be included in the PCI, about the following aspects of a Significant Risk:(a) significant design assumptions and suggested work methods, sequences orother control measures;(b) arrangements for co-ordination of on-going design work and handling designchanges;(c) information on significant risks identified during design;(d) materials requiring particular precautions.

Based on Template Ref HST 020 Hazard and Risk Management System (HARMS) Workbook Version 2.0 July 2011

Capital Delivery

A3 Area: Shaft 01, 02 and Tunnel S1 - S2

Hazard: Sub- artesian conditions identified in BHs at

Shaft 01

Risk: Flooding of excavations, failure of

excavations, structural failures, flotation of

structures.

Action: Ground investigation, appropriate

construction methods, groundwater monitoring,

appropriate design of temporary and permanent

works

GI undertaken to confirm levels at which sub-

artesian conditions occur.

SSB design of shaft formation at a level where

sub-artesian conditions not considered an issue.

Medium 29/10/13 D Sephton - Civil Engineering Contractors

Visitors

Public

UU Operatives

Sub-artesian conditions may become an issue if tunnel

levels or shaft formation levels lowered.

PCI, SSB, GBR, GI reports

A4 Area: All tunnels, works within WwTW, Shaft 04 and

outfall to MSC

Hazard: Potential to contaminate existing aquifer, public

or private water supplies

Risk: Pollution of water supply.

Action: Carry out testing of groundwater and

employ appropriate methods for disposal of

water arising from the works. Design GI and

permanent works to prevent introduction of

pathways for pollutants.

Appropriate GI undertaken.

Tunnel designed to be substantially watertight to

prevent egress of fluids into the surrounding

groundwater.

Tunnelling methodology to ensure that fluids

from tunnelling cannot contaminate

groundwater.

SSB docs highlight presence of aquifer and

requirements not to contaminate groundwater.

Low 29/10/13 D Sephton - Civil Engineering Public Contamination may become an issue if appropriate

tunnelling methodology is not adopted or tunnel not

constructed to be watertightness requirements.


A5 Area: All excavations and tunnels within areas of made

ground or adjacent to/below areas of made ground in

particular landfill site and former sludge lagoon

Hazard: Contaminated ground water

Risk: Pollution of aquifer and surface

watercourses including Salteye Brook and

Manchester ship Canal . Contact with

hazardous substances by construction

operatives. Pollution risk from WwTW if

contaminated groundwater disposed of through

sewers..

Action: Carry out hydrogeological investigation

and employ appropriate methods for disposal of

pumped water


and pipelines and scope confirmed with

specialist consultants and contractors.



GI from 3rd parties



DQRA undertaken and agreed with EA/LPA for

re-use of materials affected by contaminated

groundwater.

Appropriate control of hazard through MMP,

ECP and RAMS.


Visitors

UU Operatives

Contaminated groundwater may become a significant risk if

appropriate tunnelling methodologies and treatment not

adopted.


A6 Area: Works at Sallteye Brook crossing, MSC outfall and

access to ex SAL0018 subway

Hazard: Steep / Slippery Slopes

Risk: Falls, including falls into deep and

potential fast flowing water.

Action: Put in place a comprehensive method

statements and mitigation measures such as

barriers and signage

Advise of hazard through PCI. Significant

S


Visitors

Falls, slips, drowning SSB, PCI and Significant Hazard Dwgs:

SAL0018/80023696/00/98/1002

A7 Area: All excavations in made ground

Ex electrical installations

Hazard: Asbestos

Risk: Contact/inhalation by operatives.

Action: Carry out appropriate GI and asbestos

surveys

GI undertaken and interpreted.

Some asbestos found made ground in GI along

tunnel S3 - S4

Contractor made aware through PCI and GI.

Contractor to develop procedures if excavtions

within made ground known to possibly contain

asbestos.


Visitors

Public

Lung infection, disease SSB, PCI

A8 Area: All excavations and tunnels within areas of made

ground or in close proximity to areas of made ground in

particular landfill site and former sludge lagoon

Hazard: Contaminated land

Risk: Contact with hazardous substances, fire

or explosion, .

Action: Carry out testing of ground for

contaminates. Use of robust method

statements and following current guidance on

dealing with contaminated land



and contractors.



GI from 3rd parties


PCI includes all relevant GI. Procurement

process included rigorous assessment that

appropriate TBMs and methodologies selected

for tunnelling and appropriate methodologies

adopted for shaft construction.


undertaken.

Significant

S

29/10/2013

10/06/2014



Engineering

Contractors

Public

Visitors

UU Operatives

Explosion from methane in solution within groundwater

contaminated by overlying landfill/made ground.

Infections/diseases from coming into contact with

contaminated material either through excavation or

transportation (including through residential areas).


SAL0018/80023696/00/98/1002

7570/80023696/01/17/20002

7570/80023696/01/17/20003

7570/80023696/01/17/20004

7570/80023696/01/17/20005

7570/80023696/01/17/20007

7570/80023696/01/17/20008

7570/80023696/01/14/20009

A9 Area: All shafts and tunnels; pipelines, CSO chambers

Hazard: Highly permeable ground

Risk: Rapid Inundation of excavations,

instability of excavations and structures. Risk of

flotation .

Action: Desk top studies and on-site testing to

determine permeability. Design for flotation in

both temporary and permanent conditions



and contractors.



GI from 3rd parties



Pump test to be undertaken where permeability

of material critical to design (shaft 04 and outfall)

TBM selection and shaft sinking methodology to

be appropriate for encountering highly

permeable ground. Site to manage/control any

water egress in working areas

Significant

S

29/10/2013

23/06/2015



Engineering

Contractors

Public

Visitors

Risk of tunnel/shaft collapse and/or excessive settlement

leading to damage to 3rd party assets

Rapid inundation of excavations/tunnels/shafts

Structural failure of shafts/tunnels and other u/g structures.

Risk of flotation of structures and pipelines


7570/80023696/00/98/1002

SAL0018/80023696/00/98/1002

DG5053/80023696/01/09/20103

DG5053/80023696/01/09/20104

DG5053/80023696/01/14/20107

7570/80023696/01/14/20009

DG5053/80023696/01/01/20101

DG5053/80023696/01/11/20112

DG5053/80023696/01/11/20113

DG5053/80023696/01/11/20116

Y N

B1 Area: Sewer network, WwTW

Hazard: Petrol station or fuel storage site

Risk: Explosion.

Action: Confirm location of fuel storage areas

and petrol stations that in the event of a spillage

can discharge to sewer network.

No DSEAR report available

PEAZ report prepared

Contrcator to manage through site procedures

for construction

Follow UU PEAZ and DSEAR guidance.

Appropriate zoning and rating of elec equipment.


Public

Visitors

Fire, explosion, injury HARMS

B10 Area: New outfall to MSC.

Hazard: Rapid changes in water pressure or flows within

MSC due to operation of sluices at locks.

Risk: Differential pressures or strong currents

immediately downstream of locks.

Action: Liaison with MSC operations team

Records of MSC structures and water levels

obtained.

Continued liaison with MSC over operation of

MSC and obtaining approvals for works in MSC.

Significant

S

29/10/13 D Sephton - Civil Engineering Contractors Risk of injury drowning to divers from underwater currents

and differential pressures.


SAL0018/80023696/00/98/1002

B11 Area: High risk - Shafts 01, 02 and tunnel S1 - S2. Other

areas, A57 access and Peel Green Rd works.

Hazard: Exhaust gases and spray from motor vehicles,

significant volumes of traffic that will be stationary during

peak times. Debris thrown from vehicles

Risk: Operatives sprayed with surface water

runoff from carriageway that may contain

chlorides or other substances. Carbon

monoxide build up from stationary traffic.

Operatives struck with debris from vehicles..

Action: Gas detection equipment in

excavations. Appropriate PPE. Adequate

fencing of working areas.

Make contractor aware through SSB/PCI.

Sufficient space allowed to provide adequate

fencing to protect workforce


Visitors

Exhaust gases and spray from motor vehicles. Debris

thrown from vehicles

SSB and PCI

B2 Area: WwTW due to filling and disposal of material, area

to west of M60 known landfill site

Hazard: Refuse Tipping (Industrial or Domestic)

Risk: Exposure to harmful substances, sharps

etc.

Action: Desk study to identify formal tips and

site visit to asses any fly tipping issues

Former landfill sites identified through available

records.

Areas of tipping on WwTW identified from

available records.

Appropriate GI undertaken and data made

available SSB, GSR, PCI.

Significant

S


Public

Visitors

UU Operatives

Contact with hazardous substances during excavation or

transportation.

Contact with contaminated groundwater.

Presence of hazardous substances not identified in GI.


7570/80023696/00/98/1002

SAL0018/80023696/00/98/1002

SAL0018/80023696/01/01/11006

SAL0018/80023696/01/01/11007

Y Y


Capital Delivery

B3 Area: All construction areas to west of M60 including

tunnels

Hazard: Military Firing Range or area of WW2 bombing –

Unexploded Ordnance (UXO)

Risk: Explosion.

Action: Desk study to confirm risk of UXO. Non-

intrusive site investigation sif considered

feasible. UXO Safety awareness talks

Desk study report of UXO risk obtained from

specialist consultant.

Magnetometer survey to be undertaken within

MSC.

Non-intrusive surveys for UXO along S3-S4 if

feasible.

Significant

S

29/10/2013

10/06/2014



Engineering

Contractors

Public

Visitors

UXO encountered in tunnel or shaft excavation. SSB, PCI and Significant Hazard Dwgs:

SAL0018/80023696/00/98/1002

B4 Area: Works within WwTW site.

3rd party land.

Hazard: Stored chemicals in tanks

Risk: Explosion, burns, inhalation of toxic

fumes.

Action: Obtain O&M and H&S files for site.

Ensure all visitors and operatives receive site

induction and follow site rules. Design new

works, accesses and working areas to avoid

contact with storage areas. Liaison with

landowners.

Include in SSB, PCI that ex site WwTW site

procedures to be followed.

Liaise with 3rd party landowners re hazardous

substances stored or used on 3rd party land.


Public

UU Operatives

Visitors

Explosion, burns, inhalation of toxic fumes if correct

procedures are not adopted

SSB, PCI

B5 Area: Works within WwTW site.

3rd party land.

Hazard: COSHH issues

Risk: Burns, skin irritation, inhalation of toxic

fumes.

Action: Obtain O&M and H&S files for site.

Liaison with landowners.

Include in SSB, PCI that ex site WwTW site

procedures to be followed.

Liaise with 3rd party landowners re hazardous

substances stored or used on 3rd party land.


Public

UU Operatives

Visitors

Explosion, burns, inhalation of toxic fumes if correct

procedures are not adopted

SSB, PCI

B6 Area: Sewer networks, watercourses

Hazard: Vermin – rats / pigeons / seagulls – poisons

Risk: Leptospirosis and other diseases and

infections.

Action: Training and PPE. Obtaining information

on known problem areas from UU Ops

Include within PCI, SSB Medium 29/10/13 D Sephton - Civil Engineering Contractors

UU Operatives

Visitors

Disease, infections SSB/PCI

B7 Area: All existing and proposed structures. High risk - all

new sewer and tunnels and ex. SAL0018 CSO and

access subway

Hazard: Contact with live sewage, high flows, flooding

and surcharge

Risk: Entrapment, explosion, fire, inhalation,

disease, infection..

Action: PPE, forced ventilation, gas tests,

emergency exit. Control through method

statement sand training. Provide the flow data

Obtained water level and flow data from

hydraulic models.

Obtained sewer flood data.

Obtained flow and flood level data from EA.

Obtained MSC water level data.

Plan works to mitigate risks of inundation, high

flows, high water levels.

Design works not to result in additional flooding

and to be able to cope with anticipated design

flows and water levels.

Significant

S

29/10/2013

10/06/2014



Engineering

Contractors

Public

Visitors

UU Operatives

Injury, drowning, flooding, damage to assets and 3rd party

property


DG5053/80023696/00/98/1001

7570/80023696/00/98/1002

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

Y N

B8 Area: New outfallto MSC.

Hazard: Discharges to or re-suspension of contamination

within silt at base of MSC channel.

Risk: Toxic conditions within MSC.

Action: Liaison with MSC operations team.

Plan works to avoid periods where re-

suspension has occurred. May be particular

issue for diving operations.

Undertake tasting of water within the canal to

confirm that water is not toxic to those having to

work in MSC

Significant

S

29/10/13 D Sephton - Civil Engineering Contractors Operatives (particularly divers) coming into contact with

toxic substances with canal.


SAL0018/80023696/00/98/1002

B9 Area: All works areas.

Hazard: Unauthorised discharges from UID works to

sewers and WwTW treatment process

Risk: Chemical overloading of works leading to

failure of treatment process or WwTW

operatives coming into contact with hazardous

substances.

Action: All discharges from UID works to be

controlled via WwTW permit system.

Confirm procedures with WwTW Ops and make

contractor aware of procedures in SSB.


UU Operatives

Visitors

Chemical overloading of works leading to failure of

treatment process or WwTW operatives coming into

contact with hazardous substances

SSB, PCI

C1 Area: All existing and proposed structures.

Hazard: Trade Effluent

Risk: Explosion, fire, inhalation of toxic fumes,

surges in flow.

Action: Obtain list of known trade effluent

discharge consents

Details of trade effluent discharges obtained and

included in PCI


UU Operatives

Visitors

Contact with hazardous substances, explosion SSB and PCI

C10 Area: Shaft 01 and Shaft 02 working areas

Hazard: Limited space within working areas for storage

of spoil, materials, plant, vehicles etc and vehicle

movements.

Risk: Accidents, injuries, unstable stockpiling of

spoil or storage of materials..

Action: Consider offsite (Eccles WwTW)

storage.

Maximise available working area (UU has

purchased No.09 Laburnum Ave).

Detailed planning of site layout, vehicle

movements and construction sequence.

Maximum available working area provided.

Constructability reviews undertaken with GCA

and specialist tunnelling consultants to confirm

there is sufficient space to construct works

safely.

S/C site layouts reviewed and s/c confirmed that

working areas sufficient.


UU Operatives

Visitors

Public

Limited working space

Impact with 3rd party property/assets or public

SSB, PCI

C11 Area: All works on sewerage network and Eccles

WwTW.

Hazard: Wastewater Treatment

Risk: Hydraulical overloading of the works,

failure of works to meet regulatory consents.

Action: Discharge pumped groundwater

following quality assessments and obtain

permits to discharge form UU Network and

WwTW permitting teams.

Obtained water level and flow data from

hydraulic models.



Plan works to mitigate risks of inundation, high

flows, high water levels.

Design works not to result in additional flooding

and to be able to cope with anticipated design

flows and water levels.

Requirements for permits to discharge

groundwater etc highlighted in SSB.

Significant

S


UU Operatives

Visitors

Public

Malfunction of WwTW leading to consent failure.

Flooding from WwTW


7570/80023696/00/98/1001

C12 Area: All existing underground structures.

High risk - existing SAL0018 subway and CSO chamber

and new shaft sand tunnels. Peel Green Road. Entrance

to Eccles WwTW

Hazard: Existing underground chambers and sewers

Risk: Entrapment, confined space, inhalation of

gases, explosions.

Action: Forced ventilation

Obtain records of structure and access.

Known problematic access.

Modification works kept to a minimum and

components can be moved/placed safely via

manual handling.

Potential for toxic atmospheres and flooding

from sewers and culverted watercourses.

Contractor to consider forced ventilation and

monitoring of weather and flows/levels. Site to

consider monitoring conditions including the

atmosphere, water, slurry, contaminated land,

grouts, chemical additives

Significant

S

29/10/2013

23/06/2015



Engineering

Contractors

UU Operatives

Visitors

Limited working space - manual handling issues

Confined space toxic atmospheres

Inundation from sewers and culverts - injury, drowning


SAL0018/80023696/00/98/1003

DG5053/80023696/01/01/20101

DG5053/80023696/01/11/20112

DG5053/80023696/01/11/20113

DG5053/80023696/01/11/20116

Y N

C13 Area: Spoil bund formation area on Eccles WwTW

Hazard: Eccles Archery Club adjacent to northern

boundary of Eccles WwTW working area. Club to remain

in use throughout works

Risk: Injury from stray arrows.

Action: Engagement with Eccles Archery Club.

Implementation of mitigation measures,

procedures and method statements to prevent

injury.

Archery club unable to be re-loacted or temp

closed due to designated international venue.

Continuous liaison with Archery club required.

Full safety zone cannnot be maintained.

Installation of mitigation along edge of working

area to provide suitable barrier to stray arrows

and to keep workforce away from barrier.

Ensure no archery taking place during

installation of mitigation.

Significant

S


UU Operatives

Visitors

Public

Injury SSB, PCI and Significant Hazard Dwgs:

7570/80023696/00/98/1001


Capital Delivery

C2 Area: Shafts 01, 02 and tunnel S1 - S2; Peel Green

Road Shaft

Hazard: Noise, ground movement and vibration from

construction activities in close proximity to residential

properties.

Risk: Disturbance to residents and potential for

structural damage to properties..

Action: Impose noise, ground movement and

vibration limits on works. Limit night and

weekend working. Impliment ground minitoring

techniques. Liaison with local residents.

Obtained appropriate GI and ground conditions

advised in SSB, PCI.

Limits on vibration, ground movement and noise

stated in SSB.

Requirement to use low noise/vibration piling

techniques at S1 and S2.

Daytime only working at S1 and S2 working

areas.

medium 29/10/13 D Sephton - Civil Engineering Contractors

UU Operatives

Visitors

Public

Damage to properties and 3rd party assists.

Adverse publicity

Breach of planning consent conditions

SSB and PCI

C3 Area: Shafts 01, 02 and tunnel S1 - S2

Hazard: Restricted access to residential properties due

to working areas.

Risk: Unsafe and limited access/egress for

residents. Potential for injury or distress..

Action: Provide adequate access to properties

acceptable alternative parking arrangements.

Ensure access/parking caters for

young/old/disabled residents and are properly

lit. Working areas to be adequately fenced.

Provided temporary footpath diversions.

Continued engagement with local residents.

Provision of alternative parking space for each

of the 8 no. houses affected.

Additional parking includes disabled provision.

Parking designed to meet current minimum

standards and vehicle movements auto tracked.

Consultation with residents over parking

requirements.

1.60m wide pedestrian/wheelchair access to

rear of properties incorporated into working

areas at S1 and S2.


Visitors

Public

Adverse publicity

Damage to vehicles parked away from properties

No space provided for additional vehicles or visitors

Damage to vehicles whilst manoeuvring in restricted

parking area

SSB and PCI

C4 Area: Existing electrical panels within WwTW and

potentially within areas of made ground. Shaft 04

Working area and access road from A57

Hazard: Asbestos

Risk: Contact/inhalation by operatives.

Action: Carryout asbestos survey and removal

ahead of the works

WwTW site asbestos survey obtained and

included in PCI.

Any further surveys required to be undertaken.

Significant

S

29/10/13 D Sephton - Civil Engineering


Engineering

Contractors

UU Operatives

Ex Asbestos survey not comprehensive.

Asbestos present in panels where electrical connections to

be made. Asbestos found in the Shaft 04 working area

SSB and PCI Y Y

C5 Area: New shafts and tunnels and existing sewer

network .

Hazard: Extremes of temperature

Risk: Failure of plant and equipment, adverse

effects of operatives.

Action: Consider providing forced ventilation

during the works and O&M

New tunnels and shafts - access to install

ventilation dusting for future maintenance of

shafts and tunnels incorporated into design of

shafts.

Maintenance Philosophy includes for use of

forced ventilation for inspection /maintenance of

shafts and tunnels

MS from contractors reviewed for ventilation

provision during construction.

significant

S


UU Operatives

Visitors

Malfunction of plant is not designed for temperature range.

Injury to operatives if forced ventilation not provided.

SSB, PCI, Maintenance Philosophy

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

C6 Area: New shafts and tunnels and existing sewer

network .

Hazard: Extremes of humidity

Risk: Failure of plant and equipment, adverse

effects of operatives.

Action: Consider providing forced ventilation

during the works and O&M

MS from contractors reviewed for ventilation


Through review process ensure plant is

designed to operate when exposed to

anticipated temp range.

New tunnels and shafts - access to install

ventilation dusting for future maintenance of

shafts and tunnels incorporated into design of

shafts.

Maintenance Philosophy includes for use of

forced ventilation for inspection /maintenance of

shafts and tunnels

significant

S


UU Operatives

Visitors

Malfunction of plant is not designed for humidity range.



SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

C7 Area: Shafts 01, 02 and tunnel S1 - S2

Hazard: Working adjacent/below/on motorway main

carriageway and slip roads

Risk: Accidents, queuing traffic, operatives

being struck by vehicles.

Action: Agreeing lane closures etc and working

procedures with Highways Agency ASC. Obtain

necessary approvals from HA/ASC. Consider

off peak period delivery/removal. Consider

access and egress points. Use approved HA

TM contractor.

Working areas separated from slip roads. Ex

VRS to be replaced with demountable VRS if

required for access.

Access to motorway to be agreed with ASC.

Restrictions on access to motorway agreed with

ASC and included in SSB/PCI.

Access to S1 during daytime now not off slip

road making it safer.

Use of Section 12 TM contractor for TM on

motorway.

Significant

S


UU Operatives

Visitors

Public

Impact with vehicles using the main carriageway or slip

roads.


SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1003

C8 Area: A57 access works. Works within Peel Green Rd.

Hazard: Working adjacent to or within 'live' carriageways

Risk: Accidents, queuing traffic, operatives

being struck by vehicles or debris.

Action: Agreeing lane closures etc and working

procedures with Highway Authority. Obtain

necessary approvals from Highway Authority.

Use approved HA TM contractor.

Signage/coning to Chapter 8. Appropriate

fencing of works.

Liaison with local HA to agree access, road

closure and TM measures.

Undertake detailed risk assessments for access

and egress to/from Shaft 01 site

Agreed reduced speed limit on A57 at Shaft 04

site access.

Shaft 04 access - design access so that

vehicles and enter/leave site without queuing or

slewing into outside lane and gives required

sightline for vehicles exiting the site.

Significant

S

29/10/2013

23/06/2015



Engineering

Contractors

UU Operatives

Visitors

Public

Managing pedestrians crossing site accesses and working

areas

Vehicles exceeding temp speed limits. Man/machine

interface

SSB and PCI

SAL0018/80023696/00/98/1002

SAL0018/80023696/01/01/11006

SAL0018/80023696/01/01/11007

DG5053/80023696/01/01/20101

DG5053/80023696/01/11/20112

DG5053/80023696/01/11/20113

DG5053/80023696/01/11/20116

Y N

C9 Area: Shaft 02 working area

Hazard: Using residential streets to access working

areas. Roads designated as play streets. Significant on-

street parking.

Risk: Accidents, damage to 3rd party vehicles.

Action: Agreeing access route with local

authority and consult with residents on access

route.

Engage with residents over managing on-street

parking.

Manage vehicle movements to working areas to

avoid conflicts with construction/3rd party

vehicles.

Use works access of M60 slip roads for delivery

of large items of plant/materials

Undertaken an assessment of alternative

accesses in conjunction with SCC/UV.

Confirmed local roads the only viable access.

Agreed access route TM proposals with

SCC/UV to ensure construction vehicles can

access site safely.

Undertaken consultation with local residents re

TM and construction access


UU Operatives

Visitors

Public

Adverse publicity

Impact from vehicles ignoring TM regime

Damage to 3rd party vehicles due to restricted highway

widths and on-street parking.

SSB, PCI

D1 Area: 1980mm dia brick sewer, MH01, and MH02,

existing SAL 0018 CSO chamber, New SAL 0018 CSO

Hazard: Making alterations to existing 1980mm NB brick

sewer that conveys combined flows. Excavating

immediately adjacent to 1980 NB sewer.

Risk: Significant flows, flooding, surcharging or

collapse resulting in injury or drowning.

Action: Plan works to take into account weather

conditions. Undertake internal surveys to

confirm structural condition. Provide flow data

Obtained existing records

Obtained flow, level and flooding data from

hydraulic model

Sheet piling to be installed to construct CSO off-

line without damaging ex sewer. Site to review

the temporary works requirement and provide a

safe sytem of work

Significant

S

29/10/2013

23/06/15



Engineering

Contractors

UU Operatives

Visitors

Public

Collapse of ex sewer leading to flooding and possible

inundation of excavations. Deep Excavations adjacent to

existing sewer. Construction of chambers over existing

sewer

SSB/PCI SAL0018/80023696/01/12/21030

SAL0018/80023696/01/12/21040

SAL0018/80023696/01/12/21041

SAL0018/80023696/01/12/21042

Y N

D10 Area: Peel Green Road working areas

Hazard: BT overhead cables

Risk: Loss of service, work stoppage.

Action: Seek undertaker's opinion and carry out

diversions ahead of the works where

necessary. Design pipeline to avoid telegraph

poles

Statutory undertakers records obtained.

Statutory undertakers consulted re works at

affected area.

Diversion of service ordered to meet

programme.

low 29/10/13 D Sephton - Civil Engineering Contractors

Public

Visitors

Diversion not undertaken to meet programme. SSB/PCI


Capital Delivery

D11 Area: New 1200NB sewer u/s of Eccles WwTW inlet

CSO. Temporary access road to Eccles WwTW site

compound.

Hazard: 3 x 1050NB cast iron trunk water mains -

THIRLMERE AQUEDUCT

Crossing below aqueduct with new 1200NB ewer.

Risk: Bursts, rapid inundation of excavations,

erosion of ground, flooding of homes, loss of

service, injuries, work stoppage.

Action: Liaison with UU team responsible for

aqueduct.

Undertake TH to confirm exact

location/depth/condition.

Develop method statements in conjunction with

UU asset team for undertaking aqueduct

crossing. Consider construction method.

Consider micro-tunnelling

TH undertaken to confirm location and level of

pipes.

UU Aqueduct Ops contacted.

Contractor to submit method statements to UU

Ops. Method for crossing aqueduct to be agreed

with UU Ops.

Limits on ground movement below aqueduct

stated in SSB.

Significant

S

29/10/2013

14/04/2014



Engineering

Contractors

UU Operatives

Visitors

Public

Unable to meet requirements of UU water ops on asset

movement criteria.

Risk to asset considered to great.

Movement of mains resulting in burst, inundation od=f

excavations, injury, drowning, damage to 3rd party property

and flooding.


DG5053/80023696/00/98/1001

7570/80023696/00/98/1001

DG5053/80023696/01/01/20101

DG5053/80023696/01/11/20112

DG5053/80023696/01/11/20103

DG5053/80023696/01/14/20107

Y Y

D12 Area: Tunnel S3 to S4 and Shaft04/Outfall.

Hazard: Redundant 165NB cast iron Naptha main

Risk: Fire, explosion.

Action: Obtain records and agree methodology

for removal with asset owner

NGG contacted to confirm main is redundant

TH undertaken to confirm location of main.

NGG procedures to be obtained to remove

sections of redundant main.


UU Operatives

Visitors

Public

Redundant main still contains residual gases or fluids that

could result in explosion during removal or damage from

ground movements.

SSB/PCI

D13 Area: Access to Shaft 01 and Shaft02 working areas

Hazard: Motorway communications and lighting cables

Risk: Fire, explosion, electrocution, disruption to

services.

Action: Obtain records from HA and agree

methodology for protection with asset owner.

Undertake trial pits. Provide services protection

slab

Comms and power cable records obtained from

HA/BBMM.

HA/BBMM contacted re works at each affected

area.

Temporary protection to services at access to

be provided in accordance with HA/BBMM

requirements

TH undertaken to confirm locations, depths and

nature of services

Ground movement/damage assessment to be

undertaken by tunnelling s/c where services with

ZOI of tunnels/shafts


UU Operatives

Visitors

Public

Uncharted services.

Services in poor condition.

SSB/PCI

D14 Area: Access to Shaft 01 and Shaft02 working areas,

Tunnel S1 - S2, Tunnel S3 - S4 (Barton HLV low level

carrier drains)

Hazard: Motorway main carriageway and slip road

drainage

Risk: Inundation of working areas or

excavation, flooding of highways with the

potential to cause accidents.

Action: Obtain records from HA and agree

methodology for protection with asset owner

Records of drainage obtained.

Drainage to be CCTV surveyed to determine

condition pre- and post- tunnelling

Ground movement/damage assessment to be

undertaken by tunnelling s/c where services with

ZOI of tunnels/shafts.

Protective measures to be undertaken by

tunnelling s/c


UU Operatives

Visitors

Public

Uncharted services.


SSB/PCI

D15 Area: Existing assets during tunnelled crossing below

assets - Tunnel drive S2 - S3

Hazard: UU sewers - Existing 1200 NB surface water

sewer and 1000NB combined sewer.

New 2000NB sewer if construction sequence results in

tunnel crossing following installation

Risk: Potential for new or worsening of existing

structural defects leading to a potential collapse

or loss of structural integrity/watertightness.

Ingress of fines into sewer leading to ground

movement and potential failure of earthworks

above sewers..

Action: Design tunnel vertical and horizontal

alignments to minimise risk of damage to

sewers. Undertake appropriate GI. Select and

design tunnelling works to minimise risk of

ground settlement and subsequent damage to

sewer. Undertake CCTV surveys to determine

structural condition. Undertake appropriate

monitoring during tunnelling works. Set

allowable settlement and vibration limits.

Surveys undertaken to accurately located

assets.

Internal surveys (CCTV and walkthrough) to

determine existing condition.

Limits on ground movement and vibration and

assets set in SSB.

Preliminary Ground movement/damage analysis

undertaken to confirm whether protective

measures required.

Tunnel vert alignment set to minimise ground

movement at asset

S/c submissions reviewed to ensure protection

to assets addressed in submission

Significant

S


UU Operatives

Visitors

Public

Greater than expected ground movements leading to

damage to assets and associated consequences.

SSB, PCI, Maintenance Philosophy and

Significant Hazard Dwgs:

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

D16 Area: Existing assets during tunnelled crossing below

assets - Tunnel drive S2 - S3

Hazard: HA Assets - 2 no. 2400 x 3000 culverts -

SALTEYE BROOK CULVERTS



or loss of structural integrity/watertightness.

Ingress of fines into sewer leading to ground

movement and potential failure culverts or M60

embankment above sewers..



culverts. Undertake appropriate GI. Select and



culverts. Undertake man-entry surveys to

determine structural condition. Undertake

appropriate monitoring during tunnelling works.

Set allowable settlement and vibration limits.

GI obtained to be able to determine ground

movements from tunnelling.

Available HA records reviewed to determine ex

condition


assets set in SSB.


undertaken to confirm whether protective

measures required.

Tunnel vert alignment set to minimise ground

movement at asset



Included within AIP for M60 crossing (to be

accepted by HA)

Pre & post condition inspection and monitoring

requirements stipulated in SSB and AIP

significant

S


UU Operatives

Visitors

Public



Asset condition has deteriorated since last inspection



SAL0018/80023696/00/98/1001

D17 Area: All new pipelines, manholes, shafts, tunnels and

structures

Hazard: Service pipes and tanks

Risk: Fire, explosion, disruption to services,

inundation of excavations, drowning, excavation

collapse.

Action: Obtain service records. Underatke

service scan as part of top survey. Undertake

THs at critical locations or at critical services.

Identify and order diversions where required

Available records of WwTW services obtained

and plotted on dwgs.

Service scan undertaken as part of topo survey.

Diversions or affected services determined.


UU Operatives

Visitors

Uncharted services.


SSB/PCI

D18 Area: Eccles WwTW temporary access road; 2m

diameter pipeline; temporary car park

Hazard: Existing 250mm sludge main which operates at

pressures up to 25 bars

Risk: Damage from construction plant and

vehicles for proposed temporary car park.

Action: Provide protection at crossing points

and below temporary car park

Contractor to follow United Utilities Guidance

and advice to protect the pipe during

construction of the new pipeline and temporary

car park. Contractor to provide designated

crossing points during construction. Cover depth

of the sludge main to be confirmed on site

Significant

S

14/04/14 Lloyd Chapeyama-Civil

Engineering

Contractors

UU Operatives

Pressurised sludge main over the new 2m diameter sewer

and below the temporary car park

7570/80023696/01/17/20005 Y N


Capital Delivery

D2 Area: 1980mm NB brick sewer above tunnel S1 - S2

Hazard: Tunnelling below 1980NB brick sewer with

cracks visible in soffit



below the M60..



sewer. Undertake appropriate GI. Select and



sewer. Undertake CCTV surveys to determine

structural condition. Undertake appropriate

monitoring during tunnelling works. Set

allowable settlement and vibration limits.

Proposed tunnel alignment kept as far away

from cracked section given site constraints for

shafts.

6 monthly monitoring of defect undertaken prior

to tunnelling. Any changes in cracking to be

notified and taken account of in the design.

GI undertaken and interpreted

Ground movement and damage assessment

undertakne to confirm ground movement should

not damage sewer

Crossing of sewer included in AIP for JN11

TBM selection to minimise risk of excessive

ground loss/settlment

Appropraite pre- and post-construction

monitoring

Significant

S


UU Operatives

Visitors

Public

Damage to sewer from excessive ground loss/settlement.

Collapse of M60 carriageway.

Injury/vehicle impact

Flooding


SAL0018/80023696/00/98/1001

D3 Area: Shaft 04 and tunnel S3 - S4.

Hazard: 24" steel trunk water main

Constructing shaft in immediate vicinity of main and

tunnelling in close proximity and below main.

Main known to be in poor condition with reported bursts

in recent years.

Risk: Bursts, rapid inundation of excavations,

erosion of banks of MSC, loss of service,

injuries, work stoppage.

Action: Liaison with UU water networks team.

Diversion/replacement of section sof main

considered to be at unacceptable levels of risk.

Undertake TH to confirm exact

location/depth/condition.

TH undertaken to confirm location

Ground movement assessment undertaken for

tunnel and shaft

Liaised with UU Water Ops re ground

movement. Confirmed main in poor condition

(previously suffered bursts in this area) and no

settlement of main permitted.

Engaged NCA to design and replace affected

sections of main.


UU Operatives

Visitors

Public

Diversion/replacement works will be undertaken within UID

working areas. Liaison between NCA and GCA required.

Damage to main during diversions.

Damage to replaced main during Shaft04/outfall

construction

SSB/PCI

D4 Area:

Hazard: Major Accident Hazard Pipelines (see in-cell

comment)

Risk: Fire, explosion, disruption to services.

Action: Undertake Linesearch - no MAHP within

proximity of works. No further action proposed.

Undertaken further MAHP check prior to letting

contract (ensure MAHP check is no more than 6

months old).


UU Operatives

Visitors

Public

Out of date MAHP data.

Uncharted services.

SSB/PCI

D5 Area: Shaft 04/New MSC outfall. Shaft 01 working area

(footpaths).

Hazard: Virgin media fibre optic cables

Risk: Undertaking excavations in close

proximity to cables or traversing over the cables

with plant. Striking services, disruption to

services, delays.



necessary.

Obtained Virgin media records.

Site meeting held and location of cables

confirmed with TH.

Outfall designed to avoid diversion.

VM requirements to protect cables included in

SSB/PCI.

VM confirmed that cables to be OCC by Nov 14.


Visitors

Cables not OCC by Nov 14.

Protection requirements not adhered to.

Any re-design of outfall affects cables.

SSB/PCI

D6 Area: Shaft 01 and Shaft 02 working areas, Tunnel S3 to

S4.

Temporary construction accesses crossing services

Sub-station immediately adjacent to Shaft02 working

area and immediately above tunnel S2 - S3.

Peel Green Rd working areas

Hazard: High Voltage Electricity (incusing sub-stations)


services.

Action: Obtain service records. Undertake

service scan as part of topo survey. Undertake

THs at critical locations or at critical services.

Engage the suppliers. Provide protection slab

over services. Consider construction method.

Identify and order diversions where required.

Liaise with services undertakers.


Statutory undertakers contacted re works at

each affected area.

Temporary protection to services at access to

be provided in accordance with SA requirements

TH undertaken to confirm locations, depths and

nature of services

Ground movement assessments undertaken for

tunnels and shafts to confirm whether SA assets

at risk. Damage assessment undertaken.


Public

Visitors

Uncharted services.


PCI, SSB

D7 Area: Shaft 01 , Eccles WwTW and Peel Green Road

working areas

Hazard: Low Voltage Electricity


services.



necessary. Provide protection slab for services;

Consider construction method



each affected area.

Diversion of service ordered to meet

programme.


Public

Visitors

Uncharted or poorly charted services. PCI, SSB


Hazard: Low pressure gas mains

Risk: Fire, explosion, disruption to services.



necessary. Consider construction method



affected area.

NGG Guidance on working adjacent/around

asset to be followed.


Public

Visitors

Uncharted or poorly charted services.

Service in poor condition

Working procedures not followed.

PCI, SSB


Hazard: Low pressure water mains

Risk: Bursts, inundation of excavations,

erosion of ground, loss of service, injuries, work

stoppage.



necessary. Consider construction method



affected area.

UU Water Ops Guidance on working

adjacent/around asset to be followed.


Public

Visitors

Uncharted or poorly charted services.

Service in poor condition

Working procedures not followed.

PCI, SSB

E1 Area: Residential properties at the Shaft 01, Shaft 02

and Peel Green Road working areas.

Hazard: Residential buildings in close proximity to large

plan area, deep excavations.

Risk: Ground movement or vibration resulting in

instability, structural defects, partial or full

structural failure.

Action: Undertake pre- and post- construction

structural assessments as appropriate.

Undertake GI and other SI to obtain relevant

information to be able to design and undertake

works in a manner to minimise vibration and

ground movement. Avoid structures by design if

possible. Provide sufficient working space

around structures to avoid impact damage or

undermining. Undertake appropriate monitoring

during the works. Set allowable settlement and

vibration limits.


Excavations located as far away from properties

that site restrictions will allow.

Sufficient working space provided to construct

works without inevitable damage to properties.

Preliminary ground movement analysis

undertaken to determine impact of tunnel/shaft

works on properties.

Pre construction condition surveys of properties

undertaken.

Ground movement and vibration limits for works

adjacent to properties stated in SSB.

Low vibration piling techniques specified in SSB.

Appropriate ground movement and vibration

monitoring specified requirement in SSB. Site to

monitor and control rate of

advance/excavation/ground movement and

sufface settlement. Periodic Inspection regime

Significant

S

29/10/2013

23/06/2015



Engineering

Contractors

UU Operatives

Visitors

Public

Greater than expected ground movements and vibration

leading to damage to properties and associated

consequences.



SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1003

DG5053/80023696/00/98/1003

DG5053/80023696/01/01/20102

DG5053/80023696/01/09/20103

DG5053/80023696/01/09/20104

DG5053/80023696/01/11/20111

DG5053/80023696/01/14/20107

DG5053/80023696/01/01/20101

DG5053/80023696/01/11/20112

DG5053/80023696/01/11/20113

DG5053/80023696/01/11/20116

SAL0018/80023696/01/12/21030

SAL0018/80023696/01/12/21040

SAL0018/80023696/01/12/21041

SAL0018/80023696/01/12/21042

Y N


Capital Delivery

E10 Area: Barton Locks

Hazard: Tunnelling in close proximity to Barton Locks



structural failure.

.

Action: Obtain records. Undertake pre- and

post- construction structural assessments as

appropriate. Undertake GI and other SI to

obtain relevant information to be able to design

and undertake shaft construction and tunnelling


ground movement. Avoid affecting structures by

design if possible. Provide sufficient working

space around structures to avoid impact

damage or undermining and provide sufficient

space in case surface intervention to TBM is

required. Undertake appropriate monitoring


vibration limits.

Available records obtained and included in SSB

and PCI.


Tunnel located as far away from locks that site

restrictions will allow.

Sufficient space provided to construct works

without inevitable damage to locks.



works on locks.

Pre construction condition surveys of locks to be

undertaken.


adjacent to locks stated in SSB.


monitoring specified requirement in SSB.

Significant

S


UU Operatives

Visitors

Public


leading to damage to locks and associated consequences.


SAL0018/80023696/00/98/1002

E11 Area: Salteye Brook Outfall structure and associated

services.

Hazard: Tunnelling in close proximity ex. Salteye Brook

Outfall Structure. Traversing plant across Salteye Brook

Outfall Structure. (note the outfall structure forms a

bridge across the brook).



structural failure.

Instability, structural defects, partial or full

structural failure resulting from exceeding safe

weight limit for vehicles crossing the bridge.

Failure of assets fixed to or laid across bridge -

24" trunk water main and Virgin Media cables

(see Services section above).





and undertake tunnelling works in a manner to

minimise vibration and ground movement.

Avoid affecting structures by design if possible.

Provide sufficient working space around

structures to avoid impact damage or

undermining and provide sufficient space in

case surface intervention to TBM is required.

Undertake appropriate monitoring during the

works. Set allowable settlement and vibration

limits.

Obtain SWL of bridge from MSC Operations

Team. If this information is not available then

undertake assessment of SWL of bridge.

Where appropriate, instigate procedures to limit

weight of vehicles crossing bridge.


and PCI.


Tunnel located as far away from outfall structure



without inevitable damage to outfall structure.



works on outfall structure.

Pre construction condition surveys of outfall

structure to be undertaken.


adjacent to outfall structures stated in SSB.



Significant

S


UU Operatives

Visitors

Public


leading to damage to outfall structure and associated

consequences.


SAL0018/80023696/00/98/1002

E12 Area: Banks of MSC

Hazard: Tunnelling in close proximity to earth bank of

MSC . Shaft and outfall construction next to and within

the bank of the MSC .


instability, defects, partial or full slope failure.

Failure of assets fixed to or laid across bridge -

24" trunk water main and Virgin Media cables

(see Services section above).


post- construction condition assessments as



and undertake shaft construction, tunnelling

works, outfall wall and outfall channel formation

in a manner to minimise vibration and ground

movement. Avoid affecting structures by design

if possible. Provide sufficient working space






limits.


and PCI.


Tunnel located as far away from MSC banks



without inevitable damage to MSC banks.



works on MSC banks.

Pre construction condition surveys of MSC

banks to be undertaken.


adjacent to MSC banks stated in SSB.



Bathymetric survey of canal banks at outfall

structure to be undertaken prior to outfall

construction commencing.

Design of outfall incorporates features to

maintain integrity of MSC bank from channel

excavation and erosion from outfall flows.

Significant

S


UU Operatives

Visitors

Public


leading to damage to MSC banks and associated

consequences.

Detailed design of outfall does not incorporate appropriate

measures to ensure integrity of MSC banks.


SAL0018/80023696/00/98/1002

E2 Area: Garden walls to residential properties in close

proximity to the Shaft 01, Shaft 02 and Peel Green Rd

working areas and garages above the line of the tunnel

S2 - S3

Hazard: Pre-fabricated garages, garden walls in close

proximity to deep excavations or located above tunnelling

works.



structural failure.

Action: Undertake pre- and post- construction

structural assessments as appropriate.

Undertake GI and other SI to obtain relevant

information to be able to design and undertake


ground movement. Avoid structures by design if

possible. Provide sufficient working space


undermining. Undertake appropriate monitoring


vibration limits.


Excavations located as far away from garden

walls etc that site restrictions will allow.

Sufficient working space provided to construct

works without inevitable damage to properties.



works on walls & garages.

Pre construction condition of walls & garages

undertaken.


adjacent to walls & garages stated in SSB.





Visitors

Public


leading to damage to garages & walls

SSB/PCI


Capital Delivery

E3 Area: 3300 x 2180 r.c. storm water box culvert in Eccles

WwTW.

Hazard: UU asset - 3300 x 2180 storm water box culvert

founded on piles. Removal of section to form new

surcharge relief chamber

Risk: Section of culvert requires removal to

form new chamber.

Storm flows within culvert may result in rapid

inundation of excavations or working areas if

flows not dealt with effectively during pile

removal. Inadequate measures to deal with

flows will result in severe flooding from the

sewer network upstream of the Eccles WwTW

Inlet CSO..

Action: Obtain record information for structure.

Undertake surveys to confirm condition of

culvert. Install suitable measures to deal with

flows during culvert removal.




Survey to confirm asset condition undertaken

TH and pile test undertaken to confirm location

and length of piles. Piles within tunnel vert

horizon

Hydraulic modelling undertaken to confirm that

flows can be temp diverted into new 2000NB

without increase in u/s flooding. Consequently,

culvert can be broken out and piles removed

prior to tunnelling commencing.


UU Operatives

Visitors

Public

Unable to remove piles

Unable to divert flows to new 2000NB if installation of

2000NB delayed.

SSB/PCI

E4 Area: 1240 x 1240 final effluent culvert and 3000 x 2000

r.c. storm water box culvert in Eccles WwTW.

Hazard: UU assets - 1240 x 1240 final effluent culvert

and 3000 x 2000 storm water box culvert located within

working area for Shaft 03.

Risk: Structural capacity of culverts unknown.

Area above the culverts potentially subject to

plant movements, material storage, spoil

treatment and stockpiling. Potential for

structural failure/collapse leading to rapid

inundation of excavations or working areas and

severe flooding from the sewer network

upstream of the Eccles WwTW Inlet CSO..

Action: Obtain record information for structures.


culverts, wall thickness rebar etc. Determine

structural capacity of culverts. Limit plant

movements, storage and stockpiling to suit

structural capacity.

Available records obtained and surveys

undertaken to confirm location and existing

condition.

Location of assets plotted on dwgs.

Requirement to protect assets included within

SSB.

Significant

S

29/10/2013

10/06/2014



Engineering

Contractors

UU Operatives

Visitors

Public

Assets not protected or movements over assets not

controlled leading to structural failure, injury, rapid

inundation, WwTW consent failure and WwtW and network

flooding


7570/80023696/00/98/1002

7570/80023696/01/17/20002

7570/80023696/01/17/20003

7570/80023696/01/17/20004

7570/80023696/01/17/20005

7570/80023696/01/17/20007

7570/80023696/01/17/20008

7570/80023696/01/17/20006

7570/80023696/01/14/20009

7570/80023696/01/14/20012

7570/80023696/01/14/20013

7570/80023696/01/14/20014

7570/80023696/01/14/20015

7570/80023696/01/14/20016

7570/80023696/01/14/20017

7570/80023696/01/14/20018

Y N

E5 Area: 1240 x 1240 r.c. final effluent box culvert in Eccles

WwTW.

Hazard: UU asset - 1240 x 1240 final effluent box culvert.

Removal of section to form new chamber

Risk: Section of culvert requires removal to

form new chamber.

Continuous final effluent flows within culvert

may result in rapid inundation of excavations or

working areas if flows not dealt with effectively

during removal of culvert. Inadequate measures

to deal with flows will result in failure of the

treatment process and potential for flooding of

the WwTW..



culvert. Install suitable measures to deal with

flows during culvert removal.

Available records obtained and surveys

undertaken to confirm location and existing

condition.


Requirement to protect maintain flows included

within SSB.

Flow and level data obtained from hydraulic

modelling and included in SSB.


UU Operatives

Visitors

Public

Flows not maintained resulting in WwTW consent failure

and WwtW and network flooding

SSB and PCI

E6 Area: 1240 x 1240 r.c. final effluent box culvert and 3 x 2

storm culvert in Eccles WwTW.

Hazard: UU asset - 1240 x 1240 FE and 3 x 2 storm

water box culvert founded on piles. Tunnel S2 - S3

crossing below culvert

Risk: Tunnelling below will result in ground

movement or vibration potentially resulting in


structural failure.

Continuous final effluent flows within culvert

may result in rapid inundation of excavations or

working areas if flows not constrained within

culvert due to structural failure. Inadequate

measures to deal with flows will result in failure

of the treatment process and potential for

flooding of the WwTW. Flows escaping from

culvert may result in erosion of ground above

tunnel..



culverts, wall thickness rebar etc. Determine

structural capacity of culverts and ability to

resist ground movement. Install appropriate

support during tunnelling to maintain integrity of

culvert during tunnelling.

Surveys undertaken to accurately located

assets.

Internal surveys (CCTV) to determine existing

condition.


assets set in SSB.


undertaken confirming that protective measures

required



Significant

S

29/10/2013

10/06/2014



Engineering

Contractors

UU Operatives

Visitors

Public

Inadequate asset protection measures resulting in FE flows

and storm flows not maintained resulting in structural

failure, rapid inundation of excavations, injury, drowning,

WwTW consent failure and WwtW and network flooding.


SAl0018/80023696/00/98/1002

7570/80023696/01/17/20002

7570/80023696/01/17/20003

7570/80023696/01/17/20004

7570/80023696/01/17/20005

7570/80023696/01/17/20007

7570/80023696/01/17/20008

7570/80023696/01/17/20006

7570/80023696/01/14/20009

7570/80023696/01/14/20012

7570/80023696/01/14/20013

7570/80023696/01/14/20014

7570/80023696/01/14/20015

7570/80023696/01/14/20016

7570/80023696/01/14/20017

7570/80023696/01/14/20018

Y N

E7 Area: Alternative construction access (along main

WwTW access road) to Shaft 03.

Hazard: FTFT culvert below main access road (linking

inlet channel to primary settlement tanks).

Risk: Structural capacity of culverts unknown. If

main access is used for alternative construction

access then structural failure may occur is

structural capacity of culvert is exceeded.

Failure of culvert would lead to flooding, injury..


Confirm structural capacity prior to use as a

construction access route.

Load capacity of culvert determined and advised

within SSB and PCI.

Vehicle loadings to be limited to safe limit.


UU Operatives

Visitors

Public

Structural failure resulting in flows not maintained resulting

in WwTW consent failure and WwtW and network flooding.

Structural failure resulting in injury.

SSB and PCI

E8 Area: Eccles WwTW - Ex Filter beds (northern bank) and

final settlement tanks

Hazard: Eccles WwTW - Ex Filter beds (northern bank)

and final settlement tanks - deep excavations for

pipelines and shafts in close proximity to these

structures.

Risk: Failure of excavation support or impact

from construction plant may result in structural

damage or damage/entanglement to

mechanical equipment. Damage may result in

failure of treatment process, flooding, injury..

Action: Obtain record information for structures.

Design and implement robust ground support to

excavations. Install adequate fencing to

working area boundaries.

Available records of assets obtained and

included in SSB and PCI.

Excavations kept an appropriate distance away

from structures.

Ground movement and vibration limits stated in

SSB.

Requirements for condition surveys and

monitoring stated in SSB.


UU Operatives

Visitors

Public

Structural failure resulting in flows not maintained resulting

in WwTW consent failure and WwtW and network flooding.

Structural failure resulting in injury.

SSB and PCI


Capital Delivery

E9 Area: Salford City Community Stadium - South Stand

Hazard: Tunnelling in close proximity to Salford City

Community Stadium - South Stand



structural failure.

Note: South stand founded on ground bearing

slab. Only north stand is founded on piles..





and undertake tunnelling works in a manner to

minimise vibration and ground movement.

Avoid affecting structures by design if possible.

Provide sufficient working space around

structures to avoid impact damage or





limits.


and PCI.


Tunnel located as far away from stadium that

site restrictions will allow.


without inevitable damage to stadium.



works on stadium.

Pre construction condition surveys of stadium to

be undertaken.





Significant

S


Visitors

Public


leading to damage to stadium and associated

consequences.


SAL0018/80023696/00/98/1002

F1 Area: All working areas and structures within defined

floodplain

Hazard: History of flooding from watercourses and

potential flooding from MSC

Risk: Inundation, injury, drowning. Implications

on flotation of pipelines and structures. Pollution

and contamination of floodwaters by

construction materials, fuels etc..

Action: Obtain flood risk data from EA. Include

data in PCI and design criteria

Flood mapping and level data obtained from EA

for Salteye Bk and MSC and included in PCI and

SSB.

Flotation design requirements included in PSD.

Site to manage and control water egress into

working areas

Significant

S

29/10/2013

23/06/2015



Engineering

Contractors

UU Operatives

Visitors

Public

Inundation of excavations and working areas. Unexpected

groundwater during construction/tunneling


DG5053/80023696/00/98/1001

7570/80023696/00/98/1002

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

DG5053/80023696/01/01/20102

DG5053/80023696/01/11/20111

DG5053/80023696/01/09/20103

DG5053/80023696/01/09/20104

DG5053/80023696/01/14/20107

DG5053/80023696/01/01/20101

DG5053/80023696/01/11/20112

DG5053/80023696/01/11/20113

DG5053/80023696/01/11/20116

Y N

F2 Area: Properties on DG5 register on Peel Green Road.

Hazard: History of flooding from sewer network

Risk: Inundation, injury, drowning. Implications

on flotation of pipelines and structures.

Disease/infection from sewage contaminated

floodwater.

Action: Obtain flooding records. Obtain flooding

and surcharge data from UU network modelling

team. Include data in PCI, SSB and design

criteria.

Provide data on flood defences (Note Peel

Green Rd DG5 properties protected by earth

flood bund and NRV).

Water level and flow data obtained from

hydraulic modelling.

DG5 flood risk data obtained and mechanism of

flooding confirmed.

Ex Flood bund to remain in place until all

downstream improvements made or maintain an

equivalent form of mitigation crest of existing

bund at 19.35m AOD

Design to include 1:30 yr event emergency

storage in the event of total power failure as no

e/o.

FRA undertaken as combined flows discharge to

WwPS confirming requirement for emergency

storage.

Significant

S

29/10/2013

10/06/2014



Engineering

Contractors

UU Operatives

Visitors

Public

Inundation of excavations and working areas.

Flooding of properties and carriageway. Unexpected

groundwater during construction/tunnelling


DG5053/80023696/00/98/1001

DG5053/80023696/01/01/20102

DG5053/80023696/01/11/20111

DG5053/80023696/01/09/20103

DG5053/80023696/01/09/20104

DG5053/80023696/01/14/20107

DG5053/80023696/01/01/20101

DG5053/80023696/01/11/20112

DG5053/80023696/01/11/20113

DG5053/80023696/01/11/20116

Y N

F3 Area: MSC - tunnelling, shaft and outfall construction

Salteye Brook - tunnel construction

Former sludge lagoon - excavations at toe of bund and

surveying

Hazard: Watercourses, reservoirs, rivers, canals, lakes,

lagoons

Risk: Injury, drowning. Inundation of

excavations. Unstable excavations. Rapid

variations in water table. .

Action: Avoid working immediately adjacent to,

or within, water bodies. Provide adequate

space within working areas next to water

bodies. Provide information on water bodies

within PCI. Avoid works that will affect stability

of banks or retaining structures. If this is not

practicable ensure works do not adversely

affect stability of banks or retaining structures.

Monitor weather and water levels on a regular

basis.

Provide appropriate rescue and working

apparatus.

Water bodies noted on dwgs.

Sufficient working space provided to avoid

immediately adjacent to water bodies (except

where crossing or connection to water body

required).

Flow and level data obtained from EA for

Salteye Bk and MSC and included in PCI and

SSB.

Significant

S


UU Operatives

Visitors

Public

Injury, drowning

Falls from height into water, slips and falls on steep banks

Inundation of excavation through or adjacent to water

bodies


7570/80023696/00/98/1002

SAL0018/80023696/00/98/1002

F4 Area: Tunnel crossing of Salteye Brook

Formation of outfall to MSC (diving operations)

Hazard: Strong underwater currents and differential

pressures

Risk: Injury, drowning.

Strong currents may be present downstream of

Barton Locks due to operation of locks and

sluices and flows entering MSC from Salteye

Brook.

Differential pressures may be present

downstream of Barton Locks due to operation

of locks and sluices.

Action: Engagement with MSC Operations

Team.

Monitor weather and water levels.

Monitor operation of locks and sluices

Flow and level data obtained from EA for

Salteye Bk and MSC and included in PCI and

SSB.

Records of MSC locks and Salteye Outfall

obtained and included in SSB/PCI

Liaison with MSC re works within MSC

Undertake works in accordance with UU

approved diving procedures (incl in SSB) and

MSC requirements

Significant

ADD F5

S

29/10/13 D Sephton - Civil Engineering Contractors Flow and level data obtained from EA for Salteye Bk and

MSC and included in PCI and SSB.


SAL0018/80023696/00/98/1002

F5 Area: Final tanks and storm tanks

Hazard: Open storage tanks

Risk: Falls into tanks, injury, drowning.

Action: Provide info in PCI and design working

areas to avoid open tanks. Provide adequate

fencing to working areas adjacent to tanks.

Working areas designed to exclude open tanks

Contrcator to provide adequate fencing and

manage risk through site procedures.


UU Operatives

Visitors

Falls, injury, drowning PCI/SSB

G1 Area: WwtW and upstream properties

Hazard: Removal of existing 3300x2200 culvert and

supporting piles to allow tunnel S2 - S3 to be

constructed. Measures for dealing with storm flows must

be in place.

Culvert cannot be abandoned until flows can be turned

into outfall tunnel.

Risk: Inundation of excavations, existing

WwTW and flooding upstream.

Injury, drowning.

TBM becoming 'stuck' if piles not removed

potentially resulting in over-excavation and

settlement/collapse of culvert structure above.

Unplanned surface intervention required to

remove piles..

Action: Temporary diversions, construction of

d/s sections of new outfall first. Constraint in

SSB

Hydraulic modelling undertaken to confirm that

flows within culvert can be temp diverted to new

2000NB in WwTW without increase in water

levels u/s.

Sequence of construction constraint included in

SSB


Public

UU Operatives

Visitors

U/s flooding if temp diversion of flows is inadequate or not

in place when culvert broken.

PCI/SSB


Capital Delivery

G2 Area: New SAL0018 CSO structure and Shaft 01

Hazard: Restricted working space at Shaft 01 working

area - insufficient space to construct shaft and

CSO/pipework concurrently

Risk: Injury due to confined working area,

damage to adjacent properties or M'way slip

road..

Action: Programme the work sto take into

account restricted working area.

Constructability review undertaken.

Maximum working area provided

Works programmed to construct shaft and CSO

in sequence.


Public

Visitors

Impact injuries, access issues and unstable excavations if

works undertaken concurrently.

PCI and SSB

G3 Area: All new assets.

WwTW

Upstream properties

Hazard: Connections of existing sewer network to new

sewers, pipelines, shaft sand tunnels

Risk: Flooding, injury, drowning and pollution..

Action: SAL0018 CSO - flows at new SAL008

shall not be able to discharge to new tunnels

and shafts until all tunnels and shafts complete.

Eccles WwTW - storm and final effluent flows

shall not be able to discharge to new tunnels

and shafts until all tunnels and shafts complete.

Peel Green Rd (1200NB) - flows shall not be

able to discharge to new pipework until all

downstream, pipework, tunnels and shafts

complete.

Peel Green Rd WwPS - discharge bellmouths

set at design levels. Connection of discharge

pipework to ex sewers shall not be made until

all downstream, pipework, tunnels and shafts

complete.

Constraints included in SSB. Flow data

provided. Site to review the temporary works

requirements and provide a safe system of work

Significant

S

29/10/2013

23/06/2015



Engineering

Contractors

Public

UU Operatives

Visitors

Flooding if works not correctly programmed and measures

undertaken to prevent flows discharging to new works out

of sequence.

PCI and SSB

SAL0018/80023696/01/12/21030

SAL0018/80023696/01/12/21040

SAL0018/80023696/01/12/21041

SAL0018/80023696/01/12/21042

Y N

G4 Area: New SAL0018

Eccles WwTW Inlet CSO

Hazard: Installation of new screens

Risk: Increase in water levels leading to

flooding, injury drowning.

Damage to new screens

Pollution.

Action: New SAL0018 - flows can only be

turned into new chamber (c/w new screens)

once all outfall tunnels etc that convey spill

flows are completed

Ex WwTW Inlet CSO - screens can only be

installed once all downstream pipelines,

culverts, shafts, tunnels, etc are completed.

Constraints included in SSB Low 29/10/13 D Sephton - Civil Engineering Contractors

Public

UU Operatives

Visitors

Flooding and damage to screens if works not correctly

programmed and measures undertaken to prevent flows

discharging to new works out of sequence.

PCI and SSB

G5 Area: All new tunnels and shafts.

Upstream properties and WwTW

Hazard: Formation of outfall channel and connection of

new outfall tunnel to MSC.

Risk: Rapid inundation, injury drowning.

Upstream flooding. Pollution..

Action: All tunnelling works and shaft fit shall be

completed prior to forming connection to MSC.

Shaft 04 stop gates shall be fully tested and

commissioned prior to forming connection to

MSC.

Constraints included in SSB medium 29/10/13 D Sephton - Civil Engineering Contractors

Visitors

Rapid inundation of shafts and tunnels if adequate

measures not taken to prevent MSC water entering works.

Injury, drowning.

PCI and SSB

G6 Area: Shaft 01 working area

Hazard: Access off M60 JN11 roundabout not available

until all WGIS JN11 improvement works have been

completed.

Risk: Increased risk of collisions, injury without

roundabout improvements..

Action: Programme works to take into account

completion date for WGIS Jn11 works.

Constraint included in SSB medium 29/10/13 D Sephton - Civil Engineering Contractors

Visitors

Public

Access off roundabout not acceptable to SCC/UV until

improvement works complete. Access would be unsafe

without improvements to r'bout.

PCI and SSB

H1 Area: Shaft 04/Outfall access.

Hazard: Rights of Way

Risk: Conflict with PROW users resulting in

injury..

Action: If practicable use alternative

routes/working areas avoiding PROW.

Provide PROW diversion.

Manage interface between vehicles and PROW

users.

No practical alternative route available.

Constraint and requirement to manage

pedestrian crossing included in SSB and PCI


Public

PROW users not following advisory signage re

construction traffic or construction vehicles not adhering to

site rules resulting in impact injuries

PCI and SSB

H10 Area: Shaft 01 and Shaft 02 working areas

Hazard: Traffic flows and speed - M60

Risk: Shaft 01/Shaft 02 working areas sited

next to M60 JN11.

Access to working areas required off M60 Slip

roads.

Tunnelling under M60 will require monitoring of

carriageway settlement and access to assets

with access points on slip roads

Access to M60 may only be possible during

nightime

Risk of collisions, accidents, injuries. .

Action: Consultation with HA/BBMM re access

off slip roads and access to M60 for surveying.

Comply with HA/BBMM requirements and

obtain necessary approvals.

Appropriate traffic management and use of Sch

12 TM contractors for TM on M60.

Site to provide adequate barriers; access and

egress ways as agreed with planning authority

Significant

S

29/10/2013

10/06/2014



Engineering

Contractors

UU Operatives

Visitors

Public

Impacts with other vehicles and pedestrians. Restricted

access. Man/machine access


SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1003

SAL0018/80023696/01/01/11010

SAL0018/80023696/01/01/11011

SAL0018/80023696/01/01/11012

SAL0018/80023696/01/01/11013

SAL0018/80023696/01/12/21030

SAL0018/80023696/01/12/21040

SAL0018/80023696/01/12/21041

SAL0018/80023696/01/12/21042

SAL0018/80023696/01/11/21029

Y N

H11 Area: Shaft 04 working area access

Hazard: Traffic flows and speed - A57 (Barton)

Risk: Shaft 04 access off 50mph limit dual

carriageway is existing access to Barton Locks.

Construction vehicles slowing down to enter

access and slow vehicles turning out of access

onto carriageway. No dedicated lanes for

speeding up/slowing down.

Restricted sight lines.

Risk of collision, injury..

Action: Consultation with highway authority.

Comply with highway authority requirements

and obtain necessary approvals.

Use of appropriate traffic management.

Obtain temporary order to restrict speed limit on

road.

Undertake improvements to access and

improve sight lines.

Consultation with BBMM to understand

restrictions on access to M60.

All access to M60 to be agreed with BBMM.

All carriageway/structure monitoring to be

agreed with BBMM to ensure it does present a

hazard to road users.

Requirements relating to M60 access included in

SSB.

Significant 29/10/13 D Sephton - Civil Engineering Contractors

UU Operatives

Visitors

Public

Impacts with other vehicles and pedestrians. SSB and PCI


Capital Delivery

H12 Area: WwtW, Shaft 01, Shaft 02, Peel Green Rd

Hazard: Parking facilities or restrictions

Risk: Limited available parking space for

construction operatives vehicles within working

areas or on adjacent residential streets.

Parking vehicles may reduce visibility, access

etc with an increase risk of collision, injury or

damage to 3rd party property.

.

Action: Impose no parking restrictions on

operatives vehicles within residential streets

Provide adequate parking at main WwTW

compound

Investigate 'bussing' operatives to satellite work

areas from main WwTW site compound

Restricted space included as constraint in SSB.

Requirement for no parking and bussing

operatives to site included as a requirement in

SSB.


Visitors

Public

Impacts with other vehicles and pedestrians.

Adverse publicity

SSB and PCI

H13 Area: Shaft 01, Shaft 02, Peel Green Rd

Hazard: Restricted access to Residential Properties

Risk: Residents unable to access properties on

foot or with wheelchairs etc.

Residents unable to access properties to park

vehicles etc

Residents unable to access properties to

undertake maintenance, refuse removal etc

Emergency services unable to access

residential properties.

Risks of injury, accidents, public health issues,

damage to 3rd party property.

.

Action: Design working areas maintain

pedestrian and vehicular access to front and

rear of properties.

Where this is not practicable maintain

pedestrian access and make appropriate

alternative arrangements for parking and refuse

collections.

Liaise with residents to understand their

requirements (disabilities, elderly, young

children etc).

Ensure access is suitable (ie for disabled, push

chairs etc).

Liaison with residents to determine special

access requirements.

Requirements to maintain access included as

constraint within SSB.

Works designed so that working areas can be

configured to maintain access.


Visitors

Public

Residents unable to access properties.

Risk of injury to residents if access not properly considered

or segregated from working areas.

Adverse publicity

SSB and PCI

H2 Area: Access to Shaft 01 working area

Hazard: Common access - Shaft 01 Alleyway

Risk: Collision with pedestrians or residents

using alley for pedestrian or vehicular access.

Injury or damage to property/vehicles..

Action: Provide more suitable alternative

access.

Limit number of construction vehicles using

access.

Instigate vehicle control measures as

appropriate.

SCC/UV/HA/BBMM consulted and main

access/egress to be via JN 11 roundabout and

A57.

Night-time deliveries via slip road.

Construction vehicles using alleyway only to use

alleyway for accommodation works.

Constraints included In SSB and SSB


Public

Visitors

Impact with pedestrians or resident's vehicles. Damage to

property walls bounding alleyway.

PCI and SSB

H3 Area: Shaft 04/Outfall access.

Hazard: Common access - Shaft 04 access

Risk: Access may be shared with MSC

operatives accessing Barton Locks and 3rd

party contractors engaged in Port Salford

development.

Collision, injury..

Action: Liaise with MSC operations team.

Liaise with Port Salford development team and

contractors.


appropriate.

Constraint included in SSB with requirement for

contractor to manage shared access.


Public

Visitors

Impact with other vehicles using access. PCI and SSB

H4 Area: Eccles WwTW

Hazard: Common access - Eccles WwTW

Risk: Access shared with UU operatives and

staff with increased risk of collision, injury.

Crossing of existing culverts and structures with

WwTW - possible weight restrictions (see

Adjacent Structures section above)..

Action: Liaise with WwTW management.


appropriate.

Constraint included in SSB. Medium 29/10/13 D Sephton - Civil Engineering Contractors

Public

Visitors

UU Ops

Impact with other vehicles and pedestrians using access. PCI and SSB

H5 Area: Shaft 01 working area

Hazard: Access limiting conditions - Shaft 01 working

area.

Risk: Residential roads/alleyway not suitable for

construction access.

Collision, injury, damage to roads and 3rd party

property.

Alleyway not suitable for large maintenance

access vehicles (ie Disab)..

Action: Agree access of M60 slip road, Jn11

roundabout and egress to A57 with HA/BBMM

(ASC)/SCC/UV.

Comply with requirements of 3rd parties.

Develop construction traffic

routing/management plans

Develop and implement proposals for safely

diverting or managing pedestrians at interfaces

with construction traffic

SCC/UV/HA/BBMM consulted and main

access/egress to be via JN 11 roundabout and

A57.


Construction vehicles using alleyway only to use

alleyway for accommodation works.


Road Safety Risk assessments undertaken by

specialist highway engineering consultants for

access off roundabout and management of

pedestrian interfaces

Site designed for future maintenace

requirements

Significant

S


Visitors

Public

Impacts with other vehicles and pedestrians. SSB, PCI and Significant Hazard Dwgs:

SAL0018/80023696/00/98/1001


Capital Delivery

H6 Area: Shaft 02 working area

Hazard: Access limiting conditions - Shaft 02 working

area.

Risk: Residential roads linking Peel Green Rd

and Liverpool Rd with the working area are

relatively narrow with restricted turning space at

junctions.

Significant on-street parking and roads

designated as 'Play Streets'.

Risk of collision, injury, damage to roads and

3rd party property.

Deliveries of large items of plant/materials will

not be feasible through the residential streets.

Action: Autotrack plant movements around

streets to confirm whether access possible.

Consider access of M60 slip road or through

WwTW for construction access

Instigate appropriate construction vehicle

management/routing plans.

Constraints included in SSB

Undertaken an assessment of alternative



Agreed access route TM proposals with

SCC/UV to ensure construction vehicles can

access site safely.

Undertaken consultation with local residents re

TM and construction access

Significant

S


UU Operatives

Visitors

Public


SAL0018/80023696/00/98/1003

H7 Area: Shaft 01 and Shaft 02 working areas. Salteye

Brook Culverts. SAL0018 CSO

Hazard: Exceptional loads.

Risk: Some plant required to construct the

works may be considered to be exceptional (eg

cranes, TBM etc).

Some materials required for the works may be

considered to be exceptional (eg shaft roof

slabs).

Access through the residential streets serving

the working areas will be feasible.


3rd party property..

Action: Select/design plant and design works to

take into account restricted access.

Identify alternative access to working areas for

exceptional items (eg M60 slip roads). Consider

precast panels for the CSO roof slab

Consultation with HA ASC (BBMM). Agreed that

exceptional loads can be delivered to sites via

slip roads under full closure of slip roads (full

closure for safety reasons) at night-time.

Constraints on access included in SSB.


S/C confirmed that access of slip roads

sufficient for large deliveries and TBM

removal/delivery by crane.

SSB includes BBMM requirements for slip road

closure and traffic movements. Roof Slab

Panels to be cast as precast on site as

manageable weights. Site to review the

Significant

S

29/10/2013

10/06/2014



Engineering

Contractors

Visitors

Public

Impacts with other vehicles and pedestrians. Weight Limit

over Salteye Brook when accessing Shaft 04 is 300 tonnes


SAL0018/80023696/00/98/1003

SAL0018/80023696/00/98/1001

SAL0018/80023696/01/01/11012

Y N

H8 Area: Shaft 01 working area (M60 JN11) and Shaft 04

working area (A57) accesses.

Hazard: Poor sight lines

Risk: Increased risk of accidents, injuries..

Action: Design site access to provide adequate

sight lines.

Engage specialist highways/traffic engineering

consultants in the design of accesses

Liaise with local highway authority and comply

with their requirements

Consider whether risk can be mitigated through

traffic management measures.

Requirement to maintain existing sightlines at S1

and S2 included as constraint in SSB.

Specialist highway engineering consultants

engaged to confirm sightlines at A57 Shaft 04

access.

Planning and contract docs prepared to ensure

that sufficient working area provided and

tree/hedge removal undertaken to give required

sightlines.

A57 sightline requirements included as

constraints and design requirements in PSD and

SSB

Significant

S


UU Operatives

Visitors

Public


SAL0018/80023696/00/98/1001

H9 Area: Shaft 01, Shaft 02, Shaft 03, Surcharge relief

chamber (WwTW), Eccles Inlet CSO, New SAL0018,

Peel Gn Rd WwPS, Shaft 04/MSC outfall

Hazard: Permanent or temporary lifting arrangements /

hooks etc.

Risk: Insufficient space for plant required for

pump removal.

Insufficient space for plant required for man

rider basket use.

Insufficient space for maintenance vehicles to

manoeuvre.

Unsuitable surfaces for setting up lifting

equipment.


3rd party property.

Unable to maintain assets regularly and safely..

Action: Determine weights of pumps, screens,

stop gates, man riding baskets, valves etc and

confirm craneage requirements.

Determine whether mobile cranes etc can

access assets - Autotrack vehicles

Confirm with UU Ops lifting requirements.

Consider man access requirements and

whether 2 no. man rider access is required.

Consider planning implications for access

arrangements.

ALM and HAZOP undertaken

Maintenance philosophy for shafts and tunnels

developed.

Type and size of maintenance vehicles

determined

Maintenance vehicle access incorporated into

design.

Sufficient space provided for vehicles to access,

turn and park within design (checked with

Autotrack)

Loading requirements on structures for

maintenance vehicles included in PSD


UU Operatives

Visitors

Public

Unable to maintain assets properly if maintenance access

requirements not carried through detailed design

Impacts with other vehicles and pedestrians if insufficient

space or adequate access provided.

SSB, PCI, HAZOP, ALM, Maintenance

Philosophy

J1 Area: All working areas.

Hazard: Events:

Rugby matches at Salford City Stadium

Football matches and other events at Etihad Stadium

and Old Trafford

Events at MEN

Christmas shopping at Trafford Centre

Risk: Significant increase in pedestrian and

vehicle flows.

Embargoes imposed on closures or roadworks

on M60 and A57.

Increase in on-street parking.

Increased risk of accidents, injuries, delays to

construction vehicles accessing the sites.

Access arrangements to sites may not be

available..

Action: Obtain details of events and embargoes

from relevant authorities/organisations.

Ensure working areas adequately

fenced/secure.

Included as constraint within SSB.

Continued liaison with SCC/UV, BBMM and

police re events and embargoes


Visitors

Public

Residents unable to access properties.

Risk of injury to residents if access not properly considered

or segregated from working areas.

Adverse publicity

SSB and PCI

J10 Area: SAL0018, Rooke St

Hazard: Delivery of materials to site; lack of turning

space

Risk: Limited space at SAL0018 and Rooke St -

accidents, injury damage to property.

Action: Design, where possible to allow

deliveries to enter and exit sites without turning.

If turning required make sure there is sufficient

space for safe turning.

S1 and S2 access designed to allow vehicles to

enter, exit and load/unload. Checked available

space using autotrack.

Constructability review undertaken, including

review by specialists consultants and sub-

contractors.


Public

Visitors

Risk of impact with other vehicles, operatives and

pedestrians

SSB and PCI


Capital Delivery

J2 Area: Eccles WwTW, M60 and local road network,

existing sewer network, Barton Locks

Hazard: Operation & Maintenance of existing assets

Risk: Restricting on-going UU Ops activities on

WwTW resulting in failure of equipment and

failing to meet WQ standards. Increased risk of

flooding and pollution.

Restricting access for UU Operations to

existing sewer network for

maintenance/inspection resulting in increased

risk of flooding and pollution.

Restricting access for MSC operatives to

Barton Locks resulting in disruption to shipping

and increased risk of flooding

Restricting access for motorway maintenance

operatives resulting in failure of

communication/lighting systems with associated

increased risk of accidents..

Action: Liaise with affected 3rd parties to

understand requirements.

Design working areas to allow access.

Include for access provision with contract

documents.

Requirement to maintain MSC access included

as constraint within SSB


3rd party

operatives

MSC operatives unable to operate locks and sluices with

potential consequences for flood risk and vessel

movements

SSB and PCI

J3 Area: Shaft 01 working area

Hazard: Inter-dependence with others

Risk: Access to working Shaft 01 working area

will not be available until M60 JN11 WGIS

works are complete. Possible delays to works..

Action: Liaison with WGIS contractor and

highways authority.

Liaison with WGIS contractor to determine when

works complete.

Included as constraint within SSB


Public

Visitors

Unsafe access if agreed access arrangements are not

adopted by contractor.

SSB and PCI

J4 Area: Shaft 01 working area, Shaft 04 working area and

Peel Green Rd

Hazard: Inter-dependence with others

Risk: Diversion of services in order to construct

works..

Action: Liaison with statutory undertakers

Liaison and consultation with statutory

undertakers.

Assessment of services that will require

diversion for permanent works or diversion or

replacement to construct works.

Included as constraints within SSB


Public

Visitors

Damage to service apparatus if appropriate diversion,

protection or replacement is not undertaken prior to works

commencing.

Delays to works if diversion, protection or replacement not

identified early and undertaken to meet programme.

SSB and PCI

J5 Area: Shaft 01, Shaft 02 and Peel Green Rd working

areas

Hazard: Neighbouring properties

Risk: Residential properties immediately

adjacent to Shaft 01, Shaft 02 and Peel Gn Rd

working areas.

Properties are at risk of noise, dust, vibration,

ground movement, night-time working, impact

from plant, restricted access and restricted

parking.

Refer to other specific items covering these

hazards..

Action: Refer to other specific items covering

these hazards.

Refer to Items C2, C3, C9 & E2 . Site to provide

adequate barriers. Monitor vibration and noise

levels as agreed with planning authority

Medium 29/10/2013

23/06/2015



Engineering

Contractors

Public

Visitors

Refer to Items C2, C3, C9 & E2 Man/mcahine interface;

Movement of plant above and below ground; Access and

egress; restricted working areas; Interaction with

public/traffic

SSB and PCI

DG5053/80023696/01/01/20101

DG5053/80023696/01/11/20112

DG5053/80023696/01/11/20113

DG5053/80023696/01/11/20116

Y N

J6 Area: Eccles WwTW FE culvert

Hazard: Works Authorisations / Isolation interfaces /

restricted operations - WwTW FE

Risk: Flows in FE culvert can be temporarily

stopped using storm tanks and re-circ PS. This

facility may be required to undertake works on

FE culvert. If not controlled by UU Ops then

there is a risk of the failure of the treatment

process, increased risk of flooding, risk of

pollution and risk of inundation of excavations..

Action: Agree procedure with UU Ops and

include in SSB

Facility to temporarily stop FE flows discharging

via FE culvert included in SSB.

Continued liaison with WwTW process controller

to determine when flows can be stopped.


Public

Visitors

UU Ops

Risk of flooding and malfunction of works if FE discharges

stopped at wrong time or for too long.

SSB and PCI

J7 Area: Eccles WwTW and all sewer network assets

Hazard: Works Authorisations / Isolation interfaces /

restricted operations - access to sewerage network

Risk: UU procedure for accessing UU assets

should be followed with authorisations signed

off by relevant UU Ops representative. Failure

to following procedure could lead to injury,

drowning, electrocution, entanglement in mech

plant..

Action: Agree procedure with UU Ops and

include in SSB

Requirements for access to assets included in

SSB and PCI


Public

Visitors

UU Ops

Risk of malfunction of assets. Injury, drowning, explosion,

asphyxiation if procedures not followed.

SSB and PCI

J8 Area: WwTW, Shaft 01 working area, tunnel S3 - S4,

Shaft 04/Outfall, new 2000NB sewer below WGIS rd

Hazard: Other Contracts:

Risk: Potentially other contracts on going in

close proximity:

Peel Holdings - WGIS road west of WwTW

boundary and at JN11 M60

Peel Holdings/Salford development of site to

west of M60

Highways Agency - M60 Managed M'way

Service diversion contracts for the UID scheme,

Port Salford and WGIS

All will involve works being undertaken

concurrently, and in close proximity to the UID

scheme works. Increased risk of injuries or

damage to works due to loading or impacts

from 3rd party construction plant..

Action: Liaison with 3rd parties.

Effective programming where possible to avoid

conflict with other schemes

Include constraints within SSB

Presence of other nearby construction contracts


Continuous liaison with contractors and clients

to determine restrictions, programme and

working and design requirements.

Significant

S


UU Operatives

Visitors

Public

Impacts with other contractors vehicles and operatives.

Design impacts of other works not incorporated into UID

works.

Design/construction requirements of UID works not

incorporated into other schemes.


SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

7570/80023696/00/98/1001

J9 Area: All work areas.

Hazard: Aeroplanes or flight paths

Risk: Barton aerodrome to west of site - all sites

potentially on flight path.

Risk of planes/helicopters colliding with jibs on

cranes..

Action: Liaison with Aerodrome re any specific

requirements or restrictions.

Under Civil Aviation law, companies and

contractors who need to operate cranes and

lifting equipment within 6 km of an aerodrome

boundary, at heights of more than 10 metres

above ground level (AGL) or that of surrounding

structures or trees, if higher, must receive prior

permission from the aerodrome operator.

Follow HSE guidance on works below flight

paths.

Inform Barton Aerodrome of works


Significant

S


Public

Aircraft

Impacts of aircraft with crane jibs SSB, PCI and Significant Hazard Dwgs:

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

7570/80023696/00/98/1001


Capital Delivery

K1 Area: Existing incoming 1980mm brick barrel sewer, spill

structure and CSO chamber

Ex sewers and chambers on WwTW and within Peel

Green Rd

Internal column access in piers on Barton HLB

Hazard: Existing confined spaces?

Risk: Entrapment, suffocation, explosions, fire,

drowning.

Action: provide exiting means during an

emergency, ventilation, adequate lighting and

PPE

Requirement to follow UU procedures for

entering confined spaces on ex sewer network

included in SSB/PCI.

Entry to Barton HLB columns to be agreed with

HA/BBMM. Alternative access to be used if

available.


Public

Visitors

Flooding, malfunction of assets, injury, drowning,

asphyxiation if approved procedures are not followed.

SSB and PCI

K2 Reference not used on HIC No information for this reference Undertaken HAZOP and ALM

Maintenance Philosophy prepared for Shafts

and Tunnels

Design of pipelines and chambers in accordance

with UU Standard Details, Sig Designs and

UU'Designing for Safety'

Significant (for deep shafts and tunnels)

S


UU Operatives




DG5053/80023696/00/98/1001

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

7570/80023696/00/98/1001

L1 Area: Shafts, CSO chamber, manholes

Hazard: Ex and new deep shafts and chambers

Risk: Falls, injuries.

Action: Follow approved access procedures for

ex assets

Design out where possible.

Design to UU 'Designing for Safety' for barriers,

access etc

HAZOPs

Provide maintenance plan for non-standard

deep shafts

Requirement to follow UU procedures for

entering confined spaces on ex sewer network


Undertaken HAZOP and ALM

Maintenance Philosophy prepared for Shafts

and Tunnels

Design of pipelines and chambers in accordance

with UU Standard Details, Sig Designs and

UU'Designing for Safety'

Significant (for deep shafts and tunnels)

S


UU Operatives



Confined Spaces working within the proposed 1800 sleeve

pipe at Peel Green Road


DG5053/80023696/00/98/1001

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

7570/80023696/00/98/1001

L2 Area: Barton High Level Viaduct - Installing and

Maintaining Monitoring. Bridge Assessment inspections.

Hazard: Barton High Level Viaduct


Action: Follow approved HA & BBMM access

procedures access to bridge for inspections

and installing monitoring instrumentation.

Manage access through RAMS

Obtained bridge records from HA.

Access onto bridge only via designated access

routes with RAMS approved by BBMM/HA/GCA.

Access to inspect bridge using MEWP only with

RAMS approved by BBMM/HA/GCA

Significant

S


Public

Falls, injury SSB, PCI and Significant Hazard Dwgs:

SAL0018/80023696/00/98/1002

N1 Area: Eccles WwTW, Shaft 01, Shaft 02, Shaft 04 and

Peel Green Rd

Hazard: Security system /existing security concerns

Risk: Unauthorised entry onto the site, potential

for injuries, damage and theft.

Action: Review of ex security arrangements,

gates and fencing appropriate for level of risk of

unauthorised entry

Vandalism/unauthorised entry discussed with

WwTW manager and ops.

Significant unauthorised entry & theft risk

included in SSB/PCI

Requirement for gateman at WwTW included in

SSB.

Requirement for appropriate fencing included in

SSB/PSD.

Kiosks at S1 and PGR to be steel as opposed to

GRP

Significant

S


UU Operatives

Public

Unauthorised entry onto site, vandalism, theft, injury, delay. SSB, PCI and Significant Hazard Dwgs:

DG5053/80023696/00/98/1001

7570/80023696/00/98/1002

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

N2 Area: Eccles WwTW, Shaft 01, Shaft 02, Shaft 04 and

Peel Green Rd

Hazard: Vandalism

Risk: Potential for injuries, damage and delays

to programme.

Action: Review of ex security arrangements,

gates and fencing appropriate for level of risk of

vandalism

Vandalism risk stated in SSB/PCI

Requirement for gateman at WwTW included in

SSB.

Requirement for appropriate fencing included in

SSB/PSD.

Kiosks at S1 and PGR to be steel as opposed to

GRP

Significant

S


UU Operatives

Public

Unauthorised entry onto site, vandalism, injury, delay. SSB, PCI and Significant Hazard Dwgs:

DG5053/80023696/00/98/1001

7570/80023696/00/98/1002

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

N3 Area: All work areas.

Hazard: Are services available for use by the contractor?

(e.g. Sewer, power, water connections

Risk: Injury, Diseases.

Action: Contact service providers and make

arrangements for provision of connections.

Requirements for each working area discussed

with GCA and tunnel s/c.

Service records obtained and service providers

contacted by UU re specific requirements

directly relating to construction (not welfare):

Shaft 03 - temporary power supply for TBM

All shaft locations - water supply

Statement in SSB that contractor responsible for

site service connections


Visitors

UU Operatives

Injury, infections, diseases

N4 Area: Eccles WwTW and Salford City Stadium

emergency access/egress to rear of stadium (across

tunnel line)

Hazard: Have fire assembly access routes been

accommodated

Risk: Injury, closure of facilities.

Action: Ensure that working arrangements

accommodate all known emergency access

routes

Emergency access/egress and fire assembly at

WwTW determined and requirement not to

affect in SSB/PCI.

Tunnel route S3 - S4 passes below emergency

egress/access to Salford Stadium. If a surface

intervention is required then access must be

maintained to ensure that the Stadium can

continue to operate. requirement stated in

PCI/SSB

Significant

S


Public

Injury. Stadium unable to operate unless emergency route

is available at all times.


SAL0018/80023696/00/98/1002

P1 Area: All work areas.

Hazard: Biological Hazard

Risk: Working in live sewers - leptospirosis.

Action: Avoid working in live sewers where

possible

Use appropriate PPE.

Requirements to sequence work off-line within

SSB.

Hazards highlighted in PCI.


UU Operatives

Visitors

Leptospirosis and other diseases/infections


Hazard: Burning or cutting

Risk: Injury.

Action: Consider use of non-manual methods

Use appropriate PPE

Non at design stage Medium 29/10/13 D Sephton - Civil Engineering Contractors

UU Operatives

Visitors

Injury


Hazard: Manual Handling - heavy building elements

Risk: Muscular skeletal injury.

Action: Consider use of non-manual methods

Design out manual handling issues where

possible both in construction and operation of

permanent works

HAZOP and ALM undertaken.

Design incorporates features to allow pumps to

be removed from shafts by crane or A-frame.

Hardstanding provided for cranes, set-down

areas and parking to remove the requirement for

manual handling.


UU Operatives

Muscular skeletal Injury


Hazard: Noise

Risk: Diseases - long term hearing impairment .

Action: Consider use of low noise methods (eg

Giken piling)

Use appropriate PPE

Requirement within SSB for 'Giken' type piling at

S1 and S2 locations to reduce noise adjacent to

residential properties.

Use of appropriate PPE


UU Operatives

Public

Visitors

Long term hearing impairment.

Adverse publicity


Hazard: Vibration

Risk: Diseases - vibrosis .

Action: Consider use of low vibration methods

(eg Giken piling, mechanised breaking

equipment)

Use appropriate PPE

Mechanised tunnelling techniques to be

adopted.

Requirement within SSB for 'Giken' type piling at

S1 and S2 locations to reduce vibration adjacent

to residential properties.



Public

Visitors

Vibrosis

Adverse publicity


Hazard: Dust and fibres

Risk: Diseases - lung infection.

Action: Use appropriate PPE

Inclusion of landscaping bunds at WwTW to

retain spoil on site and reduce no. of vehicle

movements through residential streets.

Use of appropriate PPE and site procedures


UU Operatives

Public

Visitors

Disease, lung infections


Capital Delivery


Hazard: Fumes

Risk: Diseases -eye and lung infection.

Action: Use appropriate PPE

Consider alternatives to equipment that

produce fumes (eg fixed power supply)

Fixed TBM power supply at shaft 03 removes

need for site generated power.

Use of appropriate PPE and site procedures.


UU Operatives

Public

Visitors

Diseases, eye and lung infections

Q1 Area: Eccles WwTW - Flies on filter beds

Hazard: Insects

Risk: Diseases.

Action: Appropriate PPE and welfare

procedures

Fly issue highlighted in SSB.

Process controller to be informed to confirm

correct levels of treatment being applied to kill

off flies.



UU Operatives

Public

Visitors

Disease, infections

R1 Area: All works area - chambers and sewers to be

abandoned

Hazard: Foamed concrete

Risk: production of explosive gasses.

Action: Assess use prior incorporation within

works

Risk highlighted on HARMS.

Use of foamed concrete with incinerator bottom

ash aggregate (IBAA) to be reviewed by detail

design team on site specific basis.

Follow HSE guidance on use of foamed

concrete


UU Operatives

Public

Visitors

Explosion

R2 Area: Outfall structure

Hazard: Diving Operations

Risk: Drowning, muscular skeletal injuries from

impacts or differential pressures.

Action: Avoid diving operations where possible

through design.

Plan dives correctly and follow UU standard

guidance on diving ops.

Obtain relevant information on hazards within

water bodies - ie sluices, underwater currents,

vessels

Records of lock and outfall structures obtained

from MSC and EA.

Current UU diving procedures included in SSB.

Requirement for all diving within MSC to be

approved by MSC.

Contractor to liaise with MSC re lock operation

and vessel movements.

Current outfall design minimises diving

operations but these will still be required as

outfall is submerged below MSC TWL

Significant

S

29/10/13 D Sephton - Civil Engineering Contractors Drowing, injury form impact or differential pressures and

underwater currents


SAL0018/80023696/00/98/1002

R3 Area: All work areas.

Hazard: Hot works

Risk: Injury, fire.

Action: Avoid hot works where possible.

Plan works and use appropriate PPE

Use of PPE Low 29/10/13 D Sephton - Civil Engineering Contractors

UU Operatives

Public

Visitors

Injury, burns, fire, explosion


Hazard: Projecting elements e.g.fish tail anchors

Risk: Injury.

Action: Appropriate PPE and

warning/demarcation of projecting elements

Appropriate PPE and de-marcation/warning Low 29/10/13 D Sephton - Civil Engineering Contractors

UU Operatives

Injury


Hazard: Waste removal

Risk: Land contamination ,pollution of

watercourses and groundwaters.

Contact with hazardous substances, ingestion,

inhalation, absorption leading to infections.

Action: Appropriate GI, assessment of

materials to be excavated.

Put in place SWMP, MMP and ECP.

Use of appropriate excavation methods and

use of appropriate PPE

GI undertaken

ISWMP prepared

ICSM prepared

LQRA and DQRA prepared and submitted to

EA/LPA and approved.

RMS for landscaping bunds prepared and

submitted to EA/LPA and approved.

Requirement within SSB for GCA to prepare

MMP (to be approved and signed off by QP),

ECP and Verification report in accordance with

current legislation/guidance


UU Operatives

Public

Visitors

Land contamination ,pollution of watercourses and

groundwaters.

Contact with hazardous substances, ingestion, inhalation,

absorption leading to infections

S1 Area: Eccles WwTW

Hazard: H&S File information

Risk: No available H&S File information.

Action: Obtain available records and

Unable to obtain H&S file

Known H&S issues included in SSB/PCI.


UU Operatives

In-complete H&S information for WwTW site

S11 Area: Eccles WwTW.

MSC

M60

Hazard: O & M manuals

Risk: Unable to design and plan works

effectively.

Action: Obtain any available O&M manuals.

Confirm O&M of ex equipment with operational

staff

No available O&M manuals.

Contractor to liaise with WwTW site ops re

WwTW O & M


UU Operatives

Falls, injury, drowning, incorrect operation

S12 Area: All works areas.

Hazard: Existing SI reports or Asset surveys

Risk: Unable to design and plan works

effectively.

Action: Obtain all relevant available records

including 3rd party records.

Review available information and identify any

further surveys required to effectively design

and construct works.

All historic UU and 3rd party GI & SI obtained

Ex SI reviewed and further GI & SI undertaken

to provide sufficient GI & SI for works to be

designed.

Contractor advised in PCI of remaining 'holes' in

SI & GI data


UU Operatives

Inadequate or un-buildable design

S2 Area: All work areas.

Hazard: DSEAR and PEAZ

Risk: PEAZ study undertaken for project.

Action: Review and update PEAZ as required.

PEAZ study undertaken for project and included

in SSB Docs

Mitigation of the risk shall be in accordance with

United Utilities Code of Practice - Installations in

Potentially Explosive Atmospheres


UU Operatives

Fire, explosion if zoning and mitigation not appropriate.

S3 Area: Eccles WwTW, works within 3rd party construction

sites

Hazard: Existing Emergency arrangements - e.g. Fire risk

/ evacuation plan, site emergency rules.

Risk: Injury, death, damage.

Action: Obtain existing site procedures and

include in site inductions and in planning of

work activities and site set-up.

WwTW Site procedures to be obtained by

Contractor and shall be adhered to.


UU Operatives

Visitors

Injury, death damage

S4 Area: Eccles WwTW, works within 3rd party construction

sites

Hazard: Existing site traffic management plan

Risk: Injury, death, damage.

Action: Obtain existing site procedures and

include in site inductions and in planning of

work activities and site set-up.

WwTW site traffic plan to be obtained by

contractor and adhered to.

SSB highlights overlaps with 3rd party

construction sites.

Contractor to obtain 3rd party traffic

management plans and adhere to them when

working within 3rd party sites.

Contractor to liaise with 3rd party contractors


UU Operatives

Visitors

Injury, vehicle impact

S5 Area: Eccles WwTW

Hazard: Asbestos survey reports

Risk: Limited asbestos report for WwTW

available.

Action: Review report, identify limitations and

undertake any further surveys as required.

Include reports in PCI

Site asbestos report obtained and included in

PCI

Contractor to review for completeness in areas

where UID works interface with ex WwTW

facilities and commission additional reports as

required.


UU Operatives

Lung infection, disease

S6 Area: All structures

Hazard: Existing ALM reviews

Risk: Injury .

Action: Undertake ALM as part of design

process

ALM undertake as part of the outline design.

ALM report included in PCI docs

ALM findings incorporated into outline design.

Construction ALM to be undertaken by

contractor.


UU Operatives

Falls, injury

S7 Area: All structures

Hazard: Existing HAZID Study Report

Existing SIF (Safety Instrumented Functions) and SIL

(Safety Integrity Level) Reviews

Risk: Injury, incorrect operation.

Action: Undertake HAZID, SIF, SIL as part of

design process

To be undertaken by Contractor Medium 29/10/13 D Sephton - Civil Engineering Contractors

UU Operatives

Injury, incorrect operation


Capital Delivery

S8 Area: All structures with M&E installations

Hazard: Existing Fire Risk review

Risk: Injury, operational issues.

Action: Undertake Fire Risk review as part of

design process

Review any ex facilities where temporary

connections to be made (eg TBM power

supply)

Fire Safety Review incorporated in ALM. No

issues raised.

Contractor to review as part of Construction

ALM/Fire Safety Review


UU Operatives

Injury, fire, explosion

S9 Area:

Hazard: Existing HAZOP reports

Risk: Injury, operational issues.

Action: No ex Hazop. Undertake HAZOP as

part of design process and update and review

as appropriate through detailed design and

construction.

No existing HAZOPs for ex assets affected.

HAZOP undertaken as part of the outline design.

HAZOP report included in PCI docs

HAZOP findings incorporated into outline design.

Construction HAZOP to be undertaken by

contractor.


UU Operatives

Falls, injury, drowning

Contractor to confirm pipeline details and cover

depth with trial pits on site. Contractor to apply

United Utilities guidance and advice to protect

the sludge main during construction and provide

designated crossing points for construction plant

Significant

S


Engineering

Contractor UU

Operatives

Pressurised sludge main over the new 2m diameter sewer

and below the temporary car park

7570/80023696/01/17/20005 Y Y

Z1 Area: SAL 0018 CSO

Hazard: Installation of concrete upstands, grilles, access

covers over large openings


Action: Consider precast upstands to avoid

working over large opening. Site to review the

temporary works required

Conisder precaszt upstands to avoid working

over large openings. Site to review the

temporary works requirements. Provide lifting

weights for the upstands

Significant

S


Engineering

Contractors Working over large openings to install grilles and access

covers


Capital Delivery

Project Number: 80023696

Version: See BC VersionClick to hide blanks

and update sheetClick to adjust row height for all text

No.

A129/10/2013

23/06/2015

12/11/2015

D Sephton - Civil

Engineering

Lloyd Chapeyama

Civil Engineering

All excavations. High Risk -

all tunnels and shafts. SAL

0018 CSO, Peel Green

Road

Hazard: Unstable strata

formations - excavations

within made ground, water

logged sands/gavels and

made ground

Risk: Trench/excavation

collapse, stability of structures

Contractors

Visitors

Public

Mitigation: Appropriate GI undertaken along line of tunnels

and scope confirmed with specialist consultants and

contractors.


All available historical GI obtained and relevant GI from 3rd

parties


PCI includes all relevant GI. Procurement process included

rigorous assessment that appropriate TBMs and

methodologies selected for tunnelling and appropriate

methodologies adopted for shaft construction.


undertaken. Site to review the temporary works and provide

a safe system of work. Monitor and control rate of

excavation/ground movement and sufface settlement

Revised risk: Significant

Risk of tunnel collapse and/or excessive settlement

leading to damage to 3rd party assets.

Possibility of damage to existing 1980 brick sewer or

undermining the structure


DG5053/80023696/00/98/1001

7570/80023696/00/98/1002

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

G5053/80023696/01/01/20101

DG5053/80023696/01/11/20112

DG5053/80023696/01/11/20113

DG5053/80023696/01/11/20116

SAL0018/80023696/01/12/21030

SAL0018/80023696/01/12/21040

SAL0018/80023696/01/12/21041

SAL0018/80023696/01/12/21042

Y N

A1029/10/2013

23/06/2015

D Sephton - Civil

Engineering

Lloyd Chapeyama

Civil Engineering

Abandoned 2300 and

1770x1150 sewers within

WwTW. Abandoned trunk

sewer in Peel Green Rd

(entrance to WwTW).

Hazard: Existing abandoned

underground structures

Risk: Stability of structure and

surrounding ground. Existing

structure may contain

groundwater/sludge/pockets of

gas.

Contractors

Mitigation: Available records obtained.

TH undertaken to confirm location and size/construction.

Existing abndoned sewers will be broken out to enable

construction


Unstable existing structures leading to collapse of

excavation.

Abandoned sewer/structures/pipes not filled/grouted

up and filled with groundwater leading to rapid

inundation of excavations.

Unknown materials with ex structures etc that may be

hazardous

Buried obstructions if trenchless techniques used. May

contain sludge/pockets of gas. Unexpected

obstructions. Restricted working space due to buried

structures


DG5053/80023696/00/98/1001

7570/80023696/00/98/1002

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

7570/80023696/01/17/20002

7570/80023696/01/17/20003

7570/80023696/01/17/20004

7570/80023696/01/17/20005

7570/80023696/01/17/20007

7570/80023696/01/17/20008

7570/80023696/01/14/20009

DG5053/80023696/01/01/20101

DG5053/80023696/01/11/20112

DG5053/80023696/01/11/20113

DG5053/80023696/01/11/20116

Y N

A11 29/10/2013D Sephton - Civil

Engineering

Tunnel S3 to S4 Hazard: Uncharted test piles

for Barton HLB

Risk: Test piles encountered

by TBM below Barton HLB

leading to over excavation and

increased risk of ground

movement. Intervention

required below bridge to

remove piles.

Contractors

Public

Visitors

Mitigation: Available records obtained.

Non-intrusive SI undertaken.

Intrusive TH to be carried out (to be agreed with HA) and any

piles removed prior to tunnelling commencing (pile removal

to be agreed with HA)


Risk of TBM striking uncharted piles resulting in

excessive ground movement and excavation from

surface to TBM face to remove piles.


SAL0018/80023696/00/98/1002


Engineering

Tunnels S01 to S02, and

S02 to S03, Shaft 01, Shaft

02, new 2m diameter sewer

next to former sludge

lagoon, new outfall to MSC.

Hazard: Unstable slopes on

the land

Risk: Failure of embankments

Contractors

Visitors

Public

UU Operatives


and pipelines and scope confirmed with specialist

consultants and contractors.



parties



Procurement process included rigorous assessment that

appropriate TBMs and methodologies selected for tunnelling

and appropriate methodologies adopted for shaft

construction and pipeline construction.


undertaken.


Risk of failure of former sludge lagoon embankment. SSB, PCI and Significant Hazard Dwgs:

7570/80023696/00/98/1002


Engineering

Works at Sallteye Brook

crossing, MSC outfall and

access to ex SAL0018

subway

Hazard: Steep / Slippery

Slopes

Risk: Falls, including falls into

deep and potential fast flowing

water

Contractors

Visitors

Mitigation: Advise of hazard through PCI.


Falls, slips, drowning SSB, PCI and Significant Hazard Dwgs:

SAL0018/80023696/00/98/1002

A829/10/2013

10/06/2014

D Sephton - Civil

Engineering

Lloyd Chapeyama

Civil Engineering

All excavations and tunnels

within areas of made

ground or in close proximity

to areas of made ground in

particular landfill site and

former sludge lagoon

Hazard: Contaminated land

Risk: Contact with hazardous

substances, fire or explosion,

Contractors

Public

Visitors

UU Operatives



contractors.



parties


PCI includes all relevant GI. Procurement process included

rigorous assessment that appropriate TBMs and

methodologies selected for tunnelling and appropriate

methodologies adopted for shaft construction.


undertaken.


Explosion from methane in solution within

groundwater contaminated by overlying landfill/made

ground.

Infections/diseases from coming into contact with

contaminated material either through excavation or

transportation (including through residential areas).


SAL0018/80023696/00/98/1002

7570/80023696/01/17/20002

7570/80023696/01/17/20003

7570/80023696/01/17/20004

7570/80023696/01/17/20005

7570/80023696/01/17/20007

7570/80023696/01/17/20008

7570/80023696/01/14/20009

A929/10/2013

23/06/2015

D Sephton - Civil

Engineering

Lloyd Chapeyama

Civil Engineering

All shafts and tunnels;

pipelines, CSO chambers

Hazard: Highly permeable

ground

Risk: Rapid Inundation of

excavations, instability of

excavations and structures.

Risk of flotation

Contractors

Public

Visitors



contractors.



parties



Pump test to be undertaken where permeability of material

critical to design (shaft 04 and outfall)

TBM selection and shaft sinking methodology to be

appropriate for encountering highly permeable ground. Site

to manage/control any water egress in working areas


Risk of tunnel/shaft collapse and/or excessive

settlement leading to damage to 3rd party assets

Rapid inundation of excavations/tunnels/shafts

Structural failure of shafts/tunnels and other u/g

structures. Risk of flotation of structures and pipelines


7570/80023696/00/98/1002

SAL0018/80023696/00/98/1002

DG5053/80023696/01/09/20103

DG5053/80023696/01/09/20104

DG5053/80023696/01/14/20107

7570/80023696/01/14/20009

DG5053/80023696/01/01/20101

DG5053/80023696/01/11/20112

DG5053/80023696/01/11/20113

DG5053/80023696/01/11/20116

Y N

B10 29/10/2013D Sephton - Civil

Engineering

New outfall to MSC. Hazard: Rapid changes in

water pressure or flows within

MSC due to operation of

sluices at locks.

Risk: Differential pressures or

strong currents immediately

downstream of locks

Contractors

Mitigation: Records of MSC structures and water levels

obtained.

Continued liaison with MSC over operation of MSC and

obtaining approvals for works in MSC.


Risk of injury drowning to divers from underwater

currents and differential pressures.


SAL0018/80023696/00/98/1002


Engineering

WwTW due to filling and

disposal of material, area to

west of M60 known landfill

site

Hazard: Refuse Tipping

(Industrial or Domestic)

Risk: Exposure to harmful

substances, sharps etc

Contractors

Public

Visitors

UU Operatives

Mitigation: Former landfill sites identified through available

records.

Areas of tipping on WwTW identified from available records.

Appropriate GI undertaken and data made available SSB,

GSR, PCI.


Contact with hazardous substances during excavation

or transportation.

Contact with contaminated groundwater.

Presence of hazardous substances not identified in GI.


7570/80023696/00/98/1002

SAL0018/80023696/00/98/1002

SAL0018/80023696/01/01/11006

SAL0018/80023696/01/01/11007Y Y

B329/10/2013

10/06/2014

D Sephton - Civil

Engineering

Lloyd Chapeyama

Civil Engineering

All construction areas to

west of M60 including

tunnels

Hazard: Military Firing Range

or area of WW2 bombing –

Unexploded Ordnance (UXO)

Risk: Explosion

Contractors

Public

Visitors

Mitigation: Desk study report of UXO risk obtained from

specialist consultant.

Magnetometer survey to be undertaken within MSC.

Non-intrusive surveys for UXO along S3-S4 if feasible.


UXO encountered in tunnel or shaft excavation. SSB, PCI and Significant Hazard Dwgs:

SAL0018/80023696/00/98/1002

B729/10/2013

10/06/2014

D Sephton - Civil

Engineering

Lloyd Chapeyama

Civil Engineering

All existing and proposed

structures. High risk - all

new sewer and tunnels and

ex. SAL0018 CSO and

access subway

Hazard: Contact with live

sewage, high flows, flooding

and surcharge

Risk: Entrapment, explosion,

fire, inhalation, disease,

infection.

Contractors

Public

Visitors

UU Operatives

Mitigation: Obtained water level and flow data from hydraulic

models.



Obtained MSC water level data.

Plan works to mitigate risks of inundation, high flows, high

water levels.

Design works not to result in additional flooding and to be

able to cope with anticipated design flows and water levels.


Injury, drowning, flooding, damage to assets and 3rd

party property


DG5053/80023696/00/98/1001

7570/80023696/00/98/1002

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003Y N


Engineering

New outfallto MSC. Hazard: Discharges to or re-

suspension of contamination

within silt at base of MSC

channel.

Risk: Toxic conditions within

MSC

Contractors

Mitigation: Plan works to avoid periods where re-suspension

has occurred. May be particular issue for diving operations.

Undertake tasting of water within the canal to confirm that

water is not toxic to those having to work in MSC


Operatives (particularly divers) coming into contact

with toxic substances with canal.


SAL0018/80023696/00/98/1002

C11 29/10/2013D Sephton - Civil

Engineering

All works on sewerage

network and Eccles

WwTW.

Hazard: Wastewater

Treatment

Risk: Hydraulical overloading

of the works, failure of works

to meet regulatory consents Contractors

UU Operatives

Visitors

Public

Mitigation: Obtained water level and flow data from hydraulic

models.



Plan works to mitigate risks of inundation, high flows, high

water levels.

Design works not to result in additional flooding and to be

able to cope with anticipated design flows and water levels.

Requirements for permits to discharge groundwater etc

highlighted in SSB.


Malfunction of WwTW leading to consent failure.

Flooding from WwTW


7570/80023696/00/98/1001

Potentially

include this

item in H&S

File? (Y/N)

Information to be provided about

the residual hazards - Identified on

Drawing/ Document No.

Detailed

design to

include SHE

box on

drawings?

Designer Measures Taken to Reduce

or Eliminate Hazard by Design, and

design assumptions in assessment.

Hazard or

Hazardous Activity

Person(s)

affected

Description of Residual Issues,

Hazards or Risks

(including details of any

Hazardous Materials assumed to

be included in the design)

12 November 2015

Date

Added

Designer

(Name &

Discipline)

"Structure"/

location

considered to be

At Risk,

Hazard and Risk Management System (HARMS) Workbook -- Significant Risks and Hazards Log

Project name: Man Trunk UIDs - SAL0018

Date:


Capital Delivery

C1229/10/2013

23/06/2015

D Sephton - Civil

Engineering

Lloyd Chapeyama

Civil Engineering

All existing underground

structures.

High risk - existing

SAL0018 subway and CSO

chamber and new shaft

sand tunnels. Peel Green

Road. Entrance to Eccles

WwTW

Hazard: Existing underground

chambers and sewers

Risk: Entrapment, confined

space, inhalation of gases,

explosions Contractors

UU Operatives

Visitors

Mitigation: Obtain records of structure and access.

Known problematic access.

Modification works kept to a minimum and components can

be moved/placed safely via manual handling.

Potential for toxic atmospheres and flooding from sewers

and culverted watercourses.

Contractor to consider forced ventilation and monitoring of

weather and flows/levels. Site to consider monitoring

conditions including the atmosphere, water, slurry,

contaminated land, grouts, chemical additives


Limited working space - manual handling issues

Confined space toxic atmospheres

Inundation from sewers and culverts - injury, drowning


SAL0018/80023696/00/98/1003

DG5053/80023696/01/01/20101

DG5053/80023696/01/11/20112

DG5053/80023696/01/11/20113

DG5053/80023696/01/11/20116

Y N


Engineering

Spoil bund formation area

on Eccles WwTW

Hazard: Eccles Archery Club

adjacent to northern boundary

of Eccles WwTW working

area. Club to remain in use

throughout works

Risk: Injury from stray arrows

Contractors

UU Operatives

Visitors

Public

Mitigation: Archery club unable to be re-loacted or temp

closed due to designated international venue.

Continuous liaison with Archery club required.

Full safety zone cannnot be maintained. Installation of

mitigation along edge of working area to provide suitable

barrier to stray arrows and to keep workforce away from

barrier.

Ensure no archery taking place during installation of

mitigation.


Injury SSB, PCI and Significant Hazard Dwgs:

7570/80023696/00/98/1001

C4 29/10/2013

D Sephton - Civil

Engineering

Lloyd Chapeyama

Civil Engineering

Existing electrical panels

within WwTW and

potentially within areas of

made ground. Shaft 04

Working area and access

road from A57

Hazard: Asbestos

Risk: Contact/inhalation by

operatives Contractors

UU Operatives

Mitigation: WwTW site asbestos survey obtained and

included in PCI.

Any further surveys required to be undertaken.


Ex Asbestos survey not comprehensive.

Asbestos present in panels where electrical

connections to be made. Asbestos found in the Shaft

04 working area

SSB and PCI

Y Y


Engineering

New shafts and tunnels and

existing sewer network .

Hazard: Extremes of

temperature

Risk: Failure of plant and

equipment, adverse effects of

operatives

Contractors

UU Operatives

Visitors

Mitigation: New tunnels and shafts - access to install

ventilation dusting for future maintenance of shafts and

tunnels incorporated into design of shafts.

Maintenance Philosophy includes for use of forced

ventilation for inspection /maintenance of shafts and tunnels

MS from contractors reviewed for ventilation provision during

construction.

Revised risk: significant

Malfunction of plant is not designed for temperature

range.



SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002


Engineering

New shafts and tunnels and

existing sewer network .

Hazard: Extremes of humidity

Risk: Failure of plant and

equipment, adverse effects of

operativesContractors

UU Operatives

Visitors

Mitigation: MS from contractors reviewed for ventilation


Through review process ensure plant is designed to operate

when exposed to anticipated temp range.

New tunnels and shafts - access to install ventilation dusting

for future maintenance of shafts and tunnels incorporated

into design of shafts.

Maintenance Philosophy includes for use of forced

ventilation for inspection /maintenance of shafts and tunnels


Malfunction of plant is not designed for humidity

range.



SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002


Engineering

Shafts 01, 02 and tunnel S1

- S2

Hazard: Working

adjacent/below/on motorway

main carriageway and slip

roads

Risk: Accidents, queuing

traffic, operatives being struck

by vehicles

Contractors

UU Operatives

Visitors

Public

Mitigation: Working areas separated from slip roads. Ex VRS

to be replaced with demountable VRS if required for access.

Access to motorway to be agreed with ASC.

Restrictions on access to motorway agreed with ASC and


Access to S1 during daytime now not off slip road making it

safer.

Use of Section 12 TM contractor for TM on motorway.


Impact with vehicles using the main carriageway or

slip roads.


SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1003

C829/10/2013

23/06/2015

D Sephton - Civil

Engineering

Lloyd Chapeyama

Civil Engineering

A57 access works. Works

within Peel Green Rd.

Hazard: Working adjacent to

or within 'live' carriageways

Risk: Accidents, queuing

traffic, operatives being struck

by vehicles or debrisContractors

UU Operatives

Visitors

Public

Mitigation: Liaison with local HA to agree access, road

closure and TM measures.

Undertake detailed risk assessments for access and egress

to/from Shaft 01 site

Agreed reduced speed limit on A57 at Shaft 04 site access.

Shaft 04 access - design access so that vehicles and

enter/leave site without queuing or slewing into outside lane

and gives required sightline for vehicles exiting the site.


Managing pedestrians crossing site accesses and

working areas

Vehicles exceeding temp speed limits. Man/machine

interface

SSB and PCI

SAL0018/80023696/00/98/1002

SAL0018/80023696/01/01/11006

SAL0018/80023696/01/01/11007

DG5053/80023696/01/01/20101

DG5053/80023696/01/11/20112

DG5053/80023696/01/11/20113

DG5053/80023696/01/11/20116

Y N


Engineering

Shaft 02 working area Hazard: Using residential

streets to access working

areas. Roads designated as

play streets. Significant on-

street parking.

Risk: Accidents, damage to

3rd party vehicles

Contractors

UU Operatives

Visitors

Public

Mitigation: Undertaken an assessment of alternative



Agreed access route TM proposals with SCC/UV to ensure

construction vehicles can access site safely.

Undertaken consultation with local residents re TM and

construction access

Revised risk: Medium

Adverse publicity

Impact from vehicles ignoring TM regime

Damage to 3rd party vehicles due to restricted

highway widths and on-street parking.

SSB, PCI

D129/10/2013

23/06/15

D Sephton - Civil

Engineering

Lloyd Chapeyama

Civil Engineering

1980mm dia brick sewer,

MH01, and MH02, existing

SAL 0018 CSO chamber,

New SAL 0018 CSO

Hazard: Making alterations to

existing 1980mm NB brick

sewer that conveys combined

flows. Excavating immediately

adjacent to 1980 NB sewer.

Risk: Significant flows,

flooding, surcharging or

collapse resulting in injury or

drowning

Contractors

UU Operatives

Visitors

Public

Mitigation: Obtained existing records

Obtained flow, level and flooding data from hydraulic model

Sheet piling to be installed to construct CSO off-line without

damaging ex sewer. Site to review the temporary works

requirement and provide a safe sytem of work


Collapse of ex sewer leading to flooding and possible

inundation of excavations. Deep Excavations adjacent

to existing sewer. Construction of chambers over

existing sewer

SSB/PCI SAL0018/80023696/01/12/21030

SAL0018/80023696/01/12/21040

SAL0018/80023696/01/12/21041

SAL0018/80023696/01/12/21042

Y

D12 29/10/2013D Sephton - Civil

Engineering

Tunnel S3 to S4 and

Shaft04/Outfall.

Hazard: Redundant 165NB

cast iron Naptha main

Risk: Fire, explosion

Contractors

UU Operatives

Visitors

Public

Mitigation: NGG contacted to confirm main is redundant

TH undertaken to confirm location of main.

NGG procedures to be obtained to remove sections of

redundant main.

Revised risk: Low

Redundant main still contains residual gases or fluids

that could result in explosion during removal or

damage from ground movements.

SSB/PCI


Engineering

Existing assets during

tunnelled crossing below

assets - Tunnel drive S2 -

S3

Hazard: UU sewers - Existing

1200 NB surface water sewer

and 1000NB combined sewer.

New 2000NB sewer if

construction sequence results

in tunnel crossing following

installation

Risk: Potential for new or

worsening of existing

structural defects leading to a

potential collapse or loss of

structural

integrity/watertightness.

Ingress of fines into sewer

leading to ground movement

and potential failure of

earthworks above sewers.

Contractors

UU Operatives

Visitors

Public

Mitigation: Surveys undertaken to accurately located assets.

Internal surveys (CCTV and walkthrough) to determine

existing condition.

Limits on ground movement and vibration and assets set in

SSB.

Preliminary Ground movement/damage analysis undertaken

to confirm whether protective measures required.

Tunnel vert alignment set to minimise ground movement at

asset

S/c submissions reviewed to ensure protection to assets

addressed in submission




SSB, PCI, Maintenance Philosophy and Significant Hazard

Dwgs:

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002


Engineering

Existing assets during

tunnelled crossing below

assets - Tunnel drive S2 -

S3

Hazard: HA Assets - 2 no.

2400 x 3000 culverts -

SALTEYE BROOK

CULVERTS




potential collapse or loss of

structural

integrity/watertightness.

Ingress of fines into sewer

leading to ground movement

and potential failure culverts or

M60 embankment above

sewers.

Contractors

UU Operatives

Visitors

Public

Mitigation: GI obtained to be able to determine ground

movements from tunnelling.

Available HA records reviewed to determine ex condition


SSB.


to confirm whether protective measures required.

Tunnel vert alignment set to minimise ground movement at

asset



Included within AIP for M60 crossing (to be accepted by HA)

Pre & post condition inspection and monitoring requirements

stipulated in SSB and AIP




Asset condition has deteriorated since last inspection


Dwgs:

SAL0018/80023696/00/98/1001

D18 14/04/2014Lloyd Chapeyama-

Civil Engineering

Eccles WwTW temporary

access road; 2m diameter

pipeline; temporary car

park

Hazard: Existing 250mm

sludge main which operates at

pressures up to 25 bars

Risk: Damage from

construction plant and

vehicles for proposed

temporary car park

Contractors UU

Operatives

Mitigation: Contractor to follow United Utilities Guidance and

advice to protect the pipe during construction of the new

pipeline and temporary car park. Contractor to provide

designated crossing points during construction. Cover depth

of the sludge main to be confirmed on site


Pressurised sludge main over the new 2m diameter

sewer and below the temporary car park

7570/80023696/01/17/20005

Y N


Engineering

1980mm NB brick sewer

above tunnel S1 - S2

Hazard: Tunnelling below

1980NB brick sewer with

cracks visible in soffit




potential collapse below the

M60.

Contractors

UU Operatives

Visitors

Public

Mitigation: Proposed tunnel alignment kept as far away from

cracked section given site constraints for shafts.

6 monthly monitoring of defect undertaken prior to

tunnelling. Any changes in cracking to be notified and taken

account of in the design.

GI undertaken and interpreted

Ground movement and damage assessment undertakne to

confirm ground movement should not damage sewer

Crossing of sewer included in AIP for JN11

TBM selection to minimise risk of excessive ground

loss/settlment

Appropraite pre- and post-construction monitoring


Damage to sewer from excessive ground

loss/settlement.

Collapse of M60 carriageway.

Injury/vehicle impact

Flooding


SAL0018/80023696/00/98/1001


Capital Delivery

E129/10/2013

23/06/2015

D Sephton - Civil

Engineering

Lloyd Chapeyama

Civil Engineering

Residential properties at

the Shaft 01, Shaft 02 and

Peel Green Road working

areas.

Hazard: Residential buildings

in close proximity to large plan

area, deep excavations.

Risk: Ground movement or

vibration resulting in instability,

structural defects, partial or

full structural failure

Contractors

UU Operatives

Visitors

Public

Mitigation: Appropriate GI undertaken.

Excavations located as far away from properties that site


Sufficient working space provided to construct works without

inevitable damage to properties.

Preliminary ground movement analysis undertaken to

determine impact of tunnel/shaft works on properties.

Pre construction condition surveys of properties undertaken.

Ground movement and vibration limits for works adjacent to

properties stated in SSB.


Appropriate ground movement and vibration monitoring

specified requirement in SSB. Site to monitor and control

rate of advance/excavation/ground movement and sufface

settlement. Periodic Inspection regime


Greater than expected ground movements and

vibration leading to damage to properties and

associated consequences.


Dwgs:

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1003

DG5053/80023696/00/98/1003

DG5053/80023696/01/01/20102

DG5053/80023696/01/09/20103

DG5053/80023696/01/09/20104

DG5053/80023696/01/11/20111

DG5053/80023696/01/14/20107

DG5053/80023696/01/01/20101

DG5053/80023696/01/11/20112

DG5053/80023696/01/11/20113

DG5053/80023696/01/11/20116

SAL0018/80023696/01/12/21030

SAL0018/80023696/01/12/21040

SAL0018/80023696/01/12/21041

SAL0018/80023696/01/12/21042

Y N

E10 29/10/2013D Sephton - Civil

Engineering

Barton Locks Hazard: Tunnelling in close

proximity to Barton Locks




full structural failure.Contractors

UU Operatives

Visitors

Public

Mitigation: Available records obtained and included in SSB

and PCI.


Tunnel located as far away from locks that site restrictions

will allow.

Sufficient space provided to construct works without

inevitable damage to locks.


determine impact of tunnel/shaft works on locks.

Pre construction condition surveys of locks to be undertaken.


locks stated in SSB.


specified requirement in SSB.



vibration leading to damage to locks and associated

consequences.


SAL0018/80023696/00/98/1002


Engineering

Salteye Brook Outfall

structure and associated

services.

Hazard: Tunnelling in close

proximity ex. Salteye Brook

Outfall Structure. Traversing

plant across Salteye Brook

Outfall Structure. (note the

outfall structure forms a bridge

across the brook).




full structural failure.

Instability, structural defects,

partial or full structural failure

resulting from exceeding safe

weight limit for vehicles

crossing the bridge.

Failure of assets fixed to or

laid across bridge - 24" trunk

water main and Virgin Media

cables (see Services section

above)

Contractors

UU Operatives

Visitors

Public


and PCI.


Tunnel located as far away from outfall structure that site



inevitable damage to outfall structure.


determine impact of tunnel/shaft works on outfall structure.

Pre construction condition surveys of outfall structure to be

undertaken.


outfall structures stated in SSB.





vibration leading to damage to outfall structure and



SAL0018/80023696/00/98/1002


Engineering

Banks of MSC Hazard: Tunnelling in close

proximity to earth bank of

MSC . Shaft and outfall

construction next to and within

the bank of the MSC .



defects, partial or full slope

failure.

Failure of assets fixed to or

laid across bridge - 24" trunk

water main and Virgin Media

cables (see Services section

above)

Contractors

UU Operatives

Visitors

Public


and PCI.


Tunnel located as far away from MSC banks that site



inevitable damage to MSC banks.


determine impact of tunnel/shaft works on MSC banks.

Pre construction condition surveys of MSC banks to be

undertaken.


MSC banks stated in SSB.



Bathymetric survey of canal banks at outfall structure to be

undertaken prior to outfall construction commencing.

Design of outfall incorporates features to maintain integrity

of MSC bank from channel excavation and erosion from

outfall flows.



vibration leading to damage to MSC banks and


Detailed design of outfall does not incorporate

appropriate measures to ensure integrity of MSC

banks.


SAL0018/80023696/00/98/1002

E429/10/2013

10/06/2014

D Sephton - Civil

Engineering

Lloyd Chapeyama

Civil Engineering

1240 x 1240 final effluent

culvert and 3000 x 2000 r.c.

storm water box culvert in

Eccles WwTW.

Hazard: UU assets - 1240 x

1240 final effluent culvert and

3000 x 2000 storm water box

culvert located within working

area for Shaft 03.

Risk: Structural capacity of

culverts unknown. Area above

the culverts potentially subject

to plant movements, material

storage, spoil treatment and

stockpiling. Potential for

structural failure/collapse

leading to rapid inundation of

excavations or working areas

and severe flooding from the

sewer network upstream of

the Eccles WwTW Inlet CSO.

Contractors

UU Operatives

Visitors

Public

Mitigation: Available records obtained and surveys

undertaken to confirm location and existing condition.


Requirement to protect assets included within SSB.


Assets not protected or movements over assets not

controlled leading to structural failure, injury, rapid

inundation, WwTW consent failure and WwtW and

network flooding


7570/80023696/00/98/1002

7570/80023696/01/17/20002

7570/80023696/01/17/20003

7570/80023696/01/17/20004

7570/80023696/01/17/20005

7570/80023696/01/17/20007

7570/80023696/01/17/20008

7570/80023696/01/17/20006

7570/80023696/01/14/20009

7570/80023696/01/14/20012

7570/80023696/01/14/20013

7570/80023696/01/14/20014

7570/80023696/01/14/20015

7570/80023696/01/14/20016

7570/80023696/01/14/20017

7570/80023696/01/14/20018

Y N

E629/10/2013

10/06/2014

D Sephton - Civil

Engineering

Lloyd Chapeyama

Civil Engineering

1240 x 1240 r.c. final

effluent box culvert and 3 x

2 storm culvert in Eccles

WwTW.

Hazard: UU asset - 1240 x

1240 FE and 3 x 2 storm water

box culvert founded on piles.

Tunnel S2 - S3 crossing below

culvert

Risk: Tunnelling below will

result in ground movement or

vibration potentially resulting

in instability, structural defects,

partial or full structural failure.

Continuous final effluent flows

within culvert may result in

rapid inundation of

excavations or working areas

if flows not constrained within

culvert due to structural

failure. Inadequate measures

to deal with flows will result in

failure of the treatment

process and potential for

flooding of the WwTW. Flows

escaping from culvert may

result in erosion of ground

above tunnel.

Contractors

UU Operatives

Visitors

Public

Mitigation: Surveys undertaken to accurately located assets.

Internal surveys (CCTV) to determine existing condition.


SSB.


confirming that protective measures required




Inadequate asset protection measures resulting in FE

flows and storm flows not maintained resulting in

structural failure, rapid inundation of excavations,

injury, drowning, WwTW consent failure and WwtW

and network flooding.


SAl0018/80023696/00/98/1002

7570/80023696/01/17/20002

7570/80023696/01/17/20003

7570/80023696/01/17/20004

7570/80023696/01/17/20005

7570/80023696/01/17/20007

7570/80023696/01/17/20008

7570/80023696/01/17/20006

7570/80023696/01/14/20009

7570/80023696/01/14/20012

7570/80023696/01/14/20013

7570/80023696/01/14/20014

7570/80023696/01/14/20015

7570/80023696/01/14/20016

7570/80023696/01/14/20017

7570/80023696/01/14/20018

Y N


Engineering

Salford City Community

Stadium - South Stand

Hazard: Tunnelling in close

proximity to Salford City

Community Stadium - South

Stand




full structural failure.

Note: South stand founded on

ground bearing slab. Only

north stand is founded on

piles.

Contractors

Visitors

Public


and PCI.


Tunnel located as far away from stadium that site restrictions

will allow.


inevitable damage to stadium.


determine impact of tunnel/shaft works on stadium.

Pre construction condition surveys of stadium to be

undertaken.


properties stated in SSB.





vibration leading to damage to stadium and associated

consequences.


SAL0018/80023696/00/98/1002

F129/10/2013

23/06/2015

D Sephton - Civil

Engineering

Lloyd Chapeyama

Civil Engineering

All working areas and

structures within defined

floodplain

Hazard: History of flooding

from watercourses and

potential flooding from MSC

Risk: Inundation, injury,

drowning. Implications on

flotation of pipelines and

structures. Pollution and

contamination of floodwaters

by construction materials,

fuels etc.

Contractors

UU Operatives

Visitors

Public

Mitigation: Flood mapping and level data obtained from EA

for Salteye Bk and MSC and included in PCI and SSB.

Flotation design requirements included in PSD. Site to

manage and control water egress into working areas



Unexpected groundwater during

construction/tunneling


DG5053/80023696/00/98/1001

7570/80023696/00/98/1002

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

DG5053/80023696/01/01/20102

DG5053/80023696/01/11/20111

DG5053/80023696/01/09/20103

DG5053/80023696/01/09/20104

DG5053/80023696/01/14/20107

DG5053/80023696/01/01/20101

DG5053/80023696/01/11/20112

DG5053/80023696/01/11/20113

DG5053/80023696/01/11/20116

Y N


Capital Delivery

F229/10/2013

10/06/2014

D Sephton - Civil

Engineering

Lloyd Chapeyama

Civil Engineering

Properties on DG5 register

on Peel Green Road.

Hazard: History of flooding

from sewer network

Risk: Inundation, injury,

drowning. Implications on

flotation of pipelines and

structures. Disease/infection

from sewage contaminated

floodwater

Contractors

UU Operatives

Visitors

Public

Mitigation: Water level and flow data obtained from hydraulic

modelling.

DG5 flood risk data obtained and mechanism of flooding

confirmed.

Ex Flood bund to remain in place until all downstream

improvements made or maintain an equivalent form of

mitigation crest of existing bund at 19.35m AOD

Design to include 1:30 yr event emergency storage in the

event of total power failure as no e/o.

FRA undertaken as combined flows discharge to WwPS

confirming requirement for emergency storage.



Flooding of properties and carriageway. Unexpected

groundwater during construction/tunnelling


DG5053/80023696/00/98/1001

DG5053/80023696/01/01/20102

DG5053/80023696/01/11/20111

DG5053/80023696/01/09/20103

DG5053/80023696/01/09/20104

DG5053/80023696/01/14/20107

DG5053/80023696/01/01/20101

DG5053/80023696/01/11/20112

DG5053/80023696/01/11/20113

DG5053/80023696/01/11/20116

Y N

F3 29/10/2013D Sephton - Civil

Engineering

MSC - tunnelling, shaft and

outfall construction

Salteye Brook - tunnel

construction

Former sludge lagoon -

excavations at toe of bund

and surveying

Hazard: Watercourses,

reservoirs, rivers, canals,

lakes, lagoons


Inundation of excavations.

Unstable excavations. Rapid

variations in water table.

Contractors

UU Operatives

Visitors

Public

Mitigation: Water bodies noted on dwgs.

Sufficient working space provided to avoid immediately

adjacent to water bodies (except where crossing or

connection to water body required).

Flow and level data obtained from EA for Salteye Bk and

MSC and included in PCI and SSB.


Injury, drowning

Falls from height into water, slips and falls on steep

banks

Inundation of excavation through or adjacent to water

bodies


7570/80023696/00/98/1002

SAL0018/80023696/00/98/1002

F4 29/10/2013D Sephton - Civil

Engineering

Tunnel crossing of Salteye

Brook

Formation of outfall to MSC

(diving operations)

Hazard: Strong underwater

currents and differential

pressures


Strong currents may be

present downstream of Barton

Locks due to operation of

locks and sluices and flows

entering MSC from Salteye

Brook.

Differential pressures may be

present downstream of Barton

Locks due to operation of

locks and sluices

Contractors

Mitigation: Flow and level data obtained from EA for Salteye

Bk and MSC and included in PCI and SSB.

Records of MSC locks and Salteye Outfall obtained and

included in SSB/PCI

Liaison with MSC re works within MSC

Undertake works in accordance with UU approved diving

procedures (incl in SSB) and MSC requirements


ADD F5

Flow and level data obtained from EA for Salteye Bk

and MSC and included in PCI and SSB.


SAL0018/80023696/00/98/1002

G329/10/2013

23/06/2015

D Sephton - Civil

Engineering

Lloyd Chapeyama

Civil Engineering

All new assets.

WwTW

Upstream properties

Hazard: Connections of

existing sewer network to new

sewers, pipelines, shaft sand

tunnels

Risk: Flooding, injury,

drowning and pollution.

Contractors

Public

UU Operatives

Visitors

Mitigation: Constraints included in SSB. Flow data provided.

Site to review the temporary works requirements and provide

a safe system of work


Flooding if works not correctly programmed and

measures undertaken to prevent flows discharging to

new works out of sequence.

PCI and SSB SAL0018/80023696/01/12/21030

SAL0018/80023696/01/12/21040

SAL0018/80023696/01/12/21041

SAL0018/80023696/01/12/21042 Y N

H1029/10/2013

10/06/2014

D Sephton - Civil

Engineering

Lloyd Chapeyama

Civil Engineering

Shaft 01 and Shaft 02

working areas

Hazard: Traffic flows and

speed - M60

Risk: Shaft 01/Shaft 02

working areas sited next to

M60 JN11.

Access to working areas

required off M60 Slip roads.

Tunnelling under M60 will

require monitoring of

carriageway settlement and

access to assets with access

points on slip roads

Access to M60 may only be

possible during nightime

Risk of collisions, accidents,

injuries.

Contractors

UU Operatives

Visitors

Public

Mitigation: Site to provide adequate barriers; access and

egress ways as agreed with planning authority


Impacts with other vehicles and pedestrians.

Restricted access. Man/machine access


SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1003

SAL0018/80023696/01/01/11010

SAL0018/80023696/01/01/11011

SAL0018/80023696/01/01/11012

SAL0018/80023696/01/01/11013

SAL0018/80023696/01/12/21030

SAL0018/80023696/01/12/21040

SAL0018/80023696/01/12/21041

SAL0018/80023696/01/12/21042

SAL0018/80023696/01/11/21029

Y N

H5 29/10/2013D Sephton - Civil

Engineering

Shaft 01 working area Hazard: Access limiting

conditions - Shaft 01 working

area.

Risk: Residential

roads/alleyway not suitable for

construction access.

Collision, injury, damage to

roads and 3rd party property.

Alleyway not suitable for large

maintenance access vehicles

(ie Disab).

Contractors

Visitors

Public

Mitigation: SCC/UV/HA/BBMM consulted and main

access/egress to be via JN 11 roundabout and A57.


Construction vehicles using alleyway only to use alleyway for

accommodation works.


Road Safety Risk assessments undertaken by specialist

highway engineering consultants for access off roundabout

and management of pedestrian interfaces

Site designed for future maintenace requirements



SAL0018/80023696/00/98/1001


Engineering

Shaft 02 working area Hazard: Access limiting

conditions - Shaft 02 working

area.

Risk: Residential roads linking

Peel Green Rd and Liverpool

Rd with the working area are

relatively narrow with

restricted turning space at

junctions.

Significant on-street parking

and roads designated as 'Play

Streets'.

Risk of collision, injury,

damage to roads and 3rd party

property.

Deliveries of large items of

plant/materials will not be

feasible through the residential

streets

Contractors

UU Operatives

Visitors

Public

Mitigation: Constraints included in SSB

Undertaken an assessment of alternative accesses in

conjunction with SCC/UV.


Agreed access route TM proposals with SCC/UV to ensure

construction vehicles can access site safely.

Undertaken consultation with local residents re TM and

construction access



SAL0018/80023696/00/98/1003

H729/10/2013

10/06/2014

D Sephton - Civil

Engineering

Lloyd Chapeyama

Civil Engineering

Shaft 01 and Shaft 02

working areas. Salteye

Brook Culverts. SAL0018

CSO

Hazard: Exceptional loads.

Risk: Some plant required to

construct the works may be

considered to be exceptional

(eg cranes, TBM etc).

Some materials required for

the works may be considered

to be exceptional (eg shaft

roof slabs).

Access through the residential

streets serving the working

areas will be feasible.

Risk of collision, injury,

damage to roads and 3rd party

property.

Contractors

Visitors

Public

Mitigation: Consultation with HA ASC (BBMM). Agreed that

exceptional loads can be delivered to sites via slip roads

under full closure of slip roads (full closure for safety

reasons) at night-time.

Constraints on access included in SSB.


S/C confirmed that access of slip roads sufficient for large

deliveries and TBM removal/delivery by crane.

SSB includes BBMM requirements for slip road closure and

traffic movements. Roof Slab Panels to be cast as precast

on site as manageable weights. Site to review the


Impacts with other vehicles and pedestrians. Weight

Limit over Salteye Brook when accessing Shaft 04 is

300 tonnes


SAL0018/80023696/00/98/1003

SAL0018/80023696/00/98/1001

SAL0018/80023696/01/01/11012

Y N


Engineering

Shaft 01 working area (M60

JN11) and Shaft 04 working

area (A57) accesses.

Hazard: Poor sight lines

Risk: Increased risk of

accidents, injuries.Contractors

UU Operatives

Visitors

Public

Mitigation: Requirement to maintain existing sightlines at S1

and S2 included as constraint in SSB.

Specialist highway engineering consultants engaged to

confirm sightlines at A57 Shaft 04 access.

Planning and contract docs prepared to ensure that

sufficient working area provided and tree/hedge removal

undertaken to give required sightlines.

A57 sightline requirements included as constraints and

design requirements in PSD and SSB



SAL0018/80023696/00/98/1001

J8 29/10/2013D Sephton - Civil

Engineering

WwTW, Shaft 01 working

area, tunnel S3 - S4, Shaft

04/Outfall, new 2000NB

sewer below WGIS rd

Hazard: Other Contracts:

Risk: Potentially other

contracts on going in close

proximity:

Peel Holdings - WGIS road

west of WwTW boundary and

at JN11 M60

Peel Holdings/Salford

development of site to west of

M60

Highways Agency - M60

Managed M'way

Service diversion contracts for

the UID scheme, Port Salford

and WGIS

All will involve works being

undertaken concurrently, and

in close proximity to the UID

scheme works. Increased risk

of injuries or damage to works

due to loading or impacts from

3rd party construction plant.

Contractors

UU Operatives

Visitors

Public

Mitigation: Presence of other nearby construction contracts


Continuous liaison with contractors and clients to determine

restrictions, programme and working and design

requirements.


Impacts with other contractors vehicles and

operatives.

Design impacts of other works not incorporated into

UID works.

Design/construction requirements of UID works not

incorporated into other schemes.


SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

7570/80023696/00/98/1001

J9 29/10/2013D Sephton - Civil

Engineering

All work areas. Hazard: Aeroplanes or flight

paths

Risk: Barton aerodrome to

west of site - all sites

potentially on flight path.

Risk of planes/helicopters

colliding with jibs on cranes.

Contractors

Public

Aircraft

Mitigation: Follow HSE guidance on works below flight

paths.

Inform Barton Aerodrome of works



Impacts of aircraft with crane jibs SSB, PCI and Significant Hazard Dwgs:

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

7570/80023696/00/98/1001

K2 29/10/2013D Sephton - Civil

Engineering

No information for this

reference


referenceContractors

UU Operatives

Mitigation: Undertaken HAZOP and ALM

Maintenance Philosophy prepared for Shafts and Tunnels

Design of pipelines and chambers in accordance with UU

Standard Details, Sig Designs and UU'Designing for Safety'

Revised risk: Significant (for deep shafts and tunnels)




DG5053/80023696/00/98/1001

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

7570/80023696/00/98/1001


Capital Delivery

L1 29/10/2013D Sephton - Civil

Engineering

Shafts, CSO chamber,

manholes

Hazard: Ex and new deep

shafts and chambers

Risk: Falls, injuries

Contractors

UU Operatives

Mitigation: Requirement to follow UU procedures for entering

confined spaces on ex sewer network included in SSB/PCI.








Confined Spaces working within the proposed 1800

sleeve pipe at Peel Green Road


DG5053/80023696/00/98/1001

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

7570/80023696/00/98/1001


Engineering

Barton High Level Viaduct -

Installing and Maintaining

Monitoring. Bridge

Assessment inspections.

Hazard: Barton High Level

Viaduct

Risk: Falls, injuriesContractors

Public

Mitigation: Obtained bridge records from HA.

Access onto bridge only via designated access routes with

RAMS approved by BBMM/HA/GCA.

Access to inspect bridge using MEWP only with RAMS

approved by BBMM/HA/GCA


Falls, injury SSB, PCI and Significant Hazard Dwgs:

SAL0018/80023696/00/98/1002

N1 29/10/2013D Sephton - Civil

Engineering

Eccles WwTW, Shaft 01,

Shaft 02, Shaft 04 and Peel

Green Rd

Hazard: Security system

/existing security concerns

Risk: Unauthorised entry onto

the site, potential for injuries,

damage and theft

Contractors

UU Operatives

Public

Mitigation: Vandalism/unauthorised entry discussed with

WwTW manager and ops.

Significant unauthorised entry & theft risk included in

SSB/PCI

Requirement for gateman at WwTW included in SSB.

Requirement for appropriate fencing included in SSB/PSD.

Kiosks at S1 and PGR to be steel as opposed to GRP


Unauthorised entry onto site, vandalism, theft, injury,

delay.


DG5053/80023696/00/98/1001

7570/80023696/00/98/1002

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003


Engineering

Eccles WwTW, Shaft 01,

Shaft 02, Shaft 04 and Peel

Green Rd

Hazard: Vandalism

Risk: Potential for injuries,

damage and delays to

programme

Contractors

UU Operatives

Public

Mitigation: Vandalism risk stated in SSB/PCI

Requirement for gateman at WwTW included in SSB.

Requirement for appropriate fencing included in SSB/PSD.

Kiosks at S1 and PGR to be steel as opposed to GRP


Unauthorised entry onto site, vandalism, injury, delay. SSB, PCI and Significant Hazard Dwgs:

DG5053/80023696/00/98/1001

7570/80023696/00/98/1002

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003


Engineering

Eccles WwTW and Salford

City Stadium emergency

access/egress to rear of

stadium (across tunnel line)

Hazard: Have fire assembly

access routes been

accommodated

Risk: Injury, closure of

facilitiesContractors

Public

Mitigation: Emergency access/egress and fire assembly at

WwTW determined and requirement not to affect in

SSB/PCI.

Tunnel route S3 - S4 passes below emergency

egress/access to Salford Stadium. If a surface intervention is

required then access must be maintained to ensure that the

Stadium can continue to operate. requirement stated in

PCI/SSB


Injury. Stadium unable to operate unless emergency

route is available at all times.


SAL0018/80023696/00/98/1002

K2 29/10/2013D Sephton - Civil

Engineering


reference


referenceContractors

UU Operatives

Mitigation: Undertaken HAZOP and ALM








DG5053/80023696/00/98/1001

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

7570/80023696/00/98/1001


Engineering


manholes


shafts and chambers


Contractors

UU Operatives













DG5053/80023696/00/98/1001

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

7570/80023696/00/98/1001


Engineering


manholes


shafts and chambers


Contractors

UU Operatives













DG5053/80023696/00/98/1001

SAL0018/80023696/00/98/1001

SAL0018/80023696/00/98/1002

SAL0018/80023696/00/98/1003

7570/80023696/00/98/1001

R2 29/10/2013D Sephton - Civil

Engineering

Outfall structure Hazard: Diving Operations

Risk: Drowning, muscular

skeletal injuries from impacts

or differential pressures

Contractors

Mitigation: Records of lock and outfall structures obtained

from MSC and EA.

Current UU diving procedures included in SSB.

Requirement for all diving within MSC to be approved by

MSC.

Contractor to liaise with MSC re lock operation and vessel

movements.

Current outfall design minimises diving operations but these

will still be required as outfall is submerged below MSC TWL


Drowing, injury form impact or differential pressures

and underwater currents


SAL0018/80023696/00/98/1002

Z1 12/11/2015Lloyd Chapeyama-

Civil Engineering

SAL 0018 CSO Hazard: Installation of

concrete upstands, grilles,

access covers over large

openings


Contractors

Mitigation: Conisder precaszt upstands to avoid working over

large openings. Site to review the temporary works

requirements. Provide lifting weights for the upstands


Working over large openings to install grilles and

access covers


Civil Engineering

Peel Green Road (1200

sewer)

Hazard: Confined Spaces

Working in 1800 sleeve pipe

during tunelling works

Risk: Entrapment, suffocation,

explosions, fire, drowning

Contractors

Mitigation: Site to review the entry and monitoring

procedures prior to entry


Confined Spaces working


Civil Engineering

SAL 0018 CSO Hazard: Possibilty of 'cathing'

edge of existing 1980 brick

sewer due to sheet pile

tolerances; Possibility of

ground settlements

Risk: Damage to existing

structure; unsuccessful

installation of sheet piles to

design levels

Contractors

Mitigation: Site to review the temporary works requirements

and provide necessary support. Monitor the vibration and

ground settlement


Damage to existing brick sewer


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