Project No.: DEL19-024 Date: June 14, 2019
PREPARED FOR:
HLH Investments Limited
Proposed Mixed Commercial and Residential Development
1674 Hyde Park RoadLondon, Ontario
Preliminary Servicing Report
Preliminary Servicing Report Job No.: DEL19-024 Proposed Mixed use Commercial and Residential Development – 1674 Hyde Park Road June 14, 2019
TABLE OF CONTENTS
INTRODUCTION ............................................................................................................................... 1
EXISTING CONDITIONS .................................................................................................................. 1
2.1 Site Topography/Drainage ............................................................................................................ 1
2.2 Soil Conditions (Geotechnical) ...................................................................................................... 2
2.3 Existing Servicing .......................................................................................................................... 2
2.3.1 Water ..................................................................................................................................... 2
2.3.2 Storm ..................................................................................................................................... 2
2.3.3 Sanitary ................................................................................................................................. 3
2.3.4 Other Services ....................................................................................................................... 3
REVIEW AGENCIES ........................................................................................................................ 3
3.1 City of London ............................................................................................................................... 3
PROPOSED DEVELOPMENT ......................................................................................................... 3
4.1 Proposed Grading ......................................................................................................................... 3
4.2 Proposed Servicing ....................................................................................................................... 4
4.2.1 Water ..................................................................................................................................... 4
4.2.2 Storm ..................................................................................................................................... 4
4.2.3 Sanitary ................................................................................................................................. 4
4.3 Stormwater Management .............................................................................................................. 5
4.3.1 Quantity Control .................................................................................................................... 5
4.3.2 Quality Control ....................................................................................................................... 5
4.3.3 Erosion and Sediment Control .............................................................................................. 6
4.4 Transportation ............................................................................................................................... 6
4.5 Noise Attenuation .......................................................................................................................... 6
CONCLUSIONS AND RECOMMENDATIONS ................................................................................ 6
LIST OF APPENDICIES
Appendix A – Preliminary Servicing Figures, Site Plan and City As‐built Drawings. Appendix B – Preliminary Fire Flow Calculations and Sanitary Sewer Flow Calculations, Sanitary Capacity Confirmation Email.
Preliminary Servicing Report Job No.: DEL19-024 Proposed Mixed use Commercial and Residential Development – 1674 Hyde Park Road June 14, 2019
Page 1 of 7
INTRODUCTION
Development Engineering (London) Limited (DevEng) has been retained by Wilson Diaz Architecture Inc., on behalf of HLH Investments Ltd.to prepare a preliminary servicing report in support of a zoning By‐law Amendment and Site Plan Application for the site municipally known as 1674 Hyde Park Road in London, Ontario with a current site area of approximately 0.517Ha. (before‐road widening). The ultimate site area following road widening will be 0.475Ha. The subject site is comprised of a single municipal address known as 1674 Hyde Park Road. The current proposed concept is to develop a residential building in addition to the existing commercial building under its current zoning. Review of the City of London’s zoning by‐law Z.‐1 reveals that the subject site is currently zoned as BDC (Business District Commercial). A preliminary site plan concept prepared by Wilson Diaz Architect Inc. as part of the consultation pre‐application package submitted to the City has been included as part this report in Appendix A. The current proposed concept is to develop the site with one (1) 6 storey residential apartment tower, surface level parking, road widening dedication and the retention of the existing commercial building. This report has been prepared following pre‐consultation with the City of London in support of a zoning by‐law amendment and site plan approval of the subject development. The report describes the existing conditions of the site, outlines servicing and anticipated stormwater management (SWM) requirements, and proposes grading, servicing and SWM options whereby these requirements can be met.
EXISTING CONDITIONS
The existing site is bounded by two (2) municipal roads, North Routledge Park to the south and Hyde Park Road to the east as well as an existing commercial development to the north and west. The site is currently partially developed with an existing two (2) storey multi‐unit commercial building. The remaining undeveloped area of the site comprises of a combination of existing gravel and paved parking areas along with open green space.
2.1 SITE TOPOGRAPHY/DRAINAGE
Site elevation contour mapping was derived from a topographic survey of the subject site conducted by Development Engineering (London) Limited dated April 11, 2019 and Ontario Base Maps (OBM). The geodetic elevation of the site ranges from approximately 272.5m along its eastern property line flanking Hyde Park Road to approximately 269.5 m along the western side of the property. In addition, plan and profile drawings for nearby municipal rights‐of‐way were provided by the City of London. These were reviewed to provide a general understanding of the existing conditions of the subject site. Site drainage from the existing gravel parking lot to the west of the existing buildings generally sheet flows west to an existing drainage ditch located partially on the subject site and the neighboring property to the west. Existing upstream drainage from the neighboring properties to the north is collected and outlets to the shared existing ditch along the west of the site. Drainage from the paved parking area east for the existing building is collected existing onsite via two (2) existing assumed drywells. A 300 mm diameter private storm stub to municipal storm maintenance hole ST‐1 was installed as part of the 2018 North Routledge Park reconstruction project.
Preliminary Servicing Report Job No.: DEL19-024 Proposed Mixed use Commercial and Residential Development – 1674 Hyde Park Road June 14, 2019
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2.2 SOIL CONDITIONS (GEOTECHNICAL)
As of the time of this report, a geotechnical investigation has not been completed. A geotechnical investigation will be completed as part of the detailed design and will be provided as part of the site plan application. Based on nearby geotechnical information on the adjacent site (1600 Hyde Park Road) the soils are not anticipated to be conducive to infiltration.
2.3 EXISTING SERVICING
As‐built plan and profile drawings were acquired from the City of London for Hyde Park Road and North Routledge Park. Area plan and design sheet drawings have also been provided by the City indicating the design targets and discharge allocation for the subject site and down stream system capacities. Refer to Figures 1‐3 in Appendix A for a graphical representation of the existing municipal civil services available for the subject site.
2.3.1 Water
There is currently a single existing 25 mm diameter PEX municipal water services to the site from Hyde Park Road. The service is currently supplied from the existing 450 mm diameter municipal watermain on Hyde Park Road. The site is currently bounded by municipal watermains on all adjacent municipal road; an existing 300 mm diameter watermain on the south (far) side of North Routledge Park and a 450 mm distribution watermain on Hyde Park Road. There is also an existing 900 mm municipal transmission watermain on Hyde Park Road. There will be no connections made to the existing 900 mm municipal transmission watermain on Hyde Park Road as part of this development. There is an existing municipal fire hydrant operating on the existing 300 mm diameter watermain at the on the southwest corner of the intersection of Hyde Park Road and North Routledge Park. Refer to Figures 1‐3 in Appendix A for a graphical representation of the existing municipal watermain available to service the subject site.
2.3.2 Storm
Hyde Park Road and North Routledge Park have fully urban profiles. Storm drainage for each municipal right of way is provided via intermittent curbside catchbasins connected to a municipal storm sewer system. City Record drawings indicate minor drainage from Hyde Park Road is collected and conveyed through a series of existing 450 mm dia. to 675 mm dia. municipal storm sewers within Hyde Park Road with an outlet to the Hyde Park North stormwater management facility (SWMF). Minor drainage from North Routledge Park Road is collected and conveyed through a series of existing 375 mm dia. to 750 mm dia. municipal storm sewers within North Routledge Park. Based on area plans received from the City, it is unclear where collected drainage from the within the North Routledge Park municipal right of way outlets. Per Plan #T18‐40 page 14 of 17 prepared by City of London Environmental & Engineering Services, the subject site has been allocated to the existing 375 mm diameter municipal storm sewer on North Routledge Park at a run‐off coefficient of C=0.70. A 375 mm diameter private drain connection (PDC) was installed to serve the site as part of the 2018 North Routledge Park reconstruction to existing ST‐1. It is our understanding based on visual site conditions that the roof drains from the existing building on municipal addresses 1674 North Routledge Park outlets to grade.
Preliminary Servicing Report Job No.: DEL19-024 Proposed Mixed use Commercial and Residential Development – 1674 Hyde Park Road June 14, 2019
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2.3.3 Sanitary
A single 150 mm diameter private sanitary drain connection (PDC) to the subject site was provided as part of the 2015 Hyde Park Road reconstruction project. The existing 150 PDC is currently not in use, it is our understanding based on discussion with HLH Investment Inc. that the existing building is currently being serviced via an onsite wastewater treatment (septic) system to the west of the existing building. Sanitary area plans and design sheets have been provided by the City of London. Per Plan #T18‐40 page 13 of 17 prepared by City of London Environmental & Engineering Services, the subject site was included as part of area EXT1 at a max density of 100p/Ha. Based on a site area of 0.47Ha., a population of 47 people has been allocated to the existing 250 mm diameter municipal sanitary sewer on North Routledge Park from 1674 Hyde Park Road.
2.3.4 Other Services
Due to the location of the site in a fully developed business area, it is assumed that North Routledge Park and Hyde Park Road have available hydro, telecommunications (Bell and Rogers) and gas services that could be utilized for the development.
REVIEW AGENCIES
3.1 CITY OF LONDON
The subject site is located within the City of London. Any future site plan applications must be submitted to and subsequently approved by the City of London. The City will also be responsible for the approval of any building permits associated with the subject site.
PROPOSED DEVELOPMENT
As noted earlier, the subject site is a single municipal address locally know as 1674 Hyde Park Road. The existing commercial building will be retained as part of the development of the site. A preliminary site plan concept prepared by Wilson Diaz Architect Inc. as part of the pre‐application consultation package submitted to the City has been included as part this report in Appendix A. The current concept is to develop the site with a single 6 storey residential apartment tower in addition to the existing commercial building being retained.
4.1 PROPOSED GRADING
The proposed grading of the site will be conducted in a manner to provide, where possible, a reasonable cut/fill balance while matching into existing grades along the property boundaries. An overland flow route should be provided such that major storm flows are not directed towards any neighboring properties but instead enter existing municipal infrastructure (a municipal right‐of‐way). No grading will be conducted in or onto the neighboring properties or easements unless otherwise approved. Detailed grading design will be completed during the site plan approval stage.
Preliminary Servicing Report Job No.: DEL19-024 Proposed Mixed use Commercial and Residential Development – 1674 Hyde Park Road June 14, 2019
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4.2 PROPOSED SERVICING
4.2.1 Water
The proposed development will require a new 200 mm diameter water service to adequately meet both domestic and fire flow demands connected to existing municipal watermain on Hyde Park Road and/or North Routledge Park. The sizing of the new service will be confirmed during detailed design. It is anticipated one or more municipal or private hydrants will be required to provide fire protection to the proposed buildings in accordance with requirements set forth in the Ontario Building Code (OBC 2012) and the Fire Underwriters Survey (FUS, 1999). It is anticipated based on the City of London pressure zone hydraulic grade line elevation of 317.0m (Hyde Park Pumping Station and Uplands Pumping Station), a residual pressure of 55.92 psi will be attainable during fire flow conditions which is greater than the 20.0 psi minimum pressure requirement per OBC 2012, fire flow calculations been included as part this report in Appendix B. A water turnover calculation will also be provided during detailed design to verify water quality can be maintained on the proposed private water service. The existing 25 mm municipal water service from Hyde Park Road to 1674 Hyde Park Road will be decommissioned and capped at the main per City of London Standards.
4.2.2 Storm
As noted earlier, it is our understanding based on visual site conditions that the roof drains from the existing building on municipal addresses 1674 North Routledge Park discharge to grade. Existing roof leaders and surface drainage will be collected and incorporated into the overall site SWM and drainage design. The site is tributary to the existing 375 mm diameter municipal storm sewer on North Routledge Park. The sizing of a new 300 mm diameter private drain connection will be confirmed during detailed design and coordinated with the Mechanical Consultant. It is anticipated SWM controls will be required to reduce the rate of runoff in the post‐development condition as described in Section 4.3 to meet the allocated design flow per plan #T18‐40 page 14 of 17 prepared by City of London Environmental & Engineering Services.
4.2.3 Sanitary
As noted previously, it is our understanding based on discussion with HLH Investment Inc. that the existing building located at 1674 Hyde Park Road is currently being serviced via an onsite wastewater treatment (septic) system located under a green space area west of the existing building. The existing on‐site wastewater treatment (septic) system will need to be decommissioned and removed in accordance with all applicable Ministry guidelines. As part of the site development, a new 200 mm diameter sanitary private drain connection is anticipated for 1674 Hyde Park Road and to be connected to the existing 250 mm diameter municipal sanitary sewer on North Routledge Park. An area plan and design sheet prepared by City of London Environmental & Engineering Services Division, plan #T18‐40 page 13 of 17 denotes an allowable design sanitary peak flow of approximately 0.64 L/s generated by 0.475Ha. of the subject site with a design criterion of 100 people/Ha. (47 people) and a per capita rate of 230 L/person/day.
Preliminary Servicing Report Job No.: DEL19-024 Proposed Mixed use Commercial and Residential Development – 1674 Hyde Park Road June 14, 2019
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It is anticipated based on current unit counts from the site plan provided by Wilson Diaz Architects Inc. that a post development sanitary peak flow rate of 1.83 L/s will be generated by a proposed site population of approximately 145 people. The sizing of the outlet private drain connection will be confirmed during detailed design and coordinated with the Mechanical consultant. The anticipated peak flow from the site is anticipated to exceed the design allocation. Per an email discussion with Mustafa Almusawi dated May 31, 2019 of the City of London Development Services Division, there are no concerns with the additional sanitary peak flow from the development as the existing system has capacity to accommodate the additional extra flows. Detailed calculations are included in Appendix B.
4.3 STORMWATER MANAGEMENT
The site is located in the Stanton Drain Subwatershed. An addendum to the 2002 Hyde Park EA was completed in 2018 by AECOM and notes the removal of the previously proposed Hyde Park stormwater management facility (SWMF) #4. As per figure 6.1.2 of the 2018 addendum, the subject site is located within subcatchment 504C, which is no longer tributary to any downstream regional SWMF. As such, the site falls under Case 3 of the City of London Permanent Private Stormwater Systems (PPS) in the City of London Design Specifications and Requirements Manual, dated October 2003, updated July 2018. According to Per Plan #T18‐40 page 14 of 17 prepared by City of London Environmental & Engineering Services, the subject site is tributary to the existing 375mm diameter municipal storm sewer on North Routledge Park. In accordance with the requirements outlined in the subwatershed study, Case 3 of the City of London PPS, and the pre‐consultation comments dated April 11, 2019, the following criteria are anticipated for the subject site:
• Restrict post‐development peak flows from the subject site for all storm events up to and including the 100‐year design storm event, to the lesser of the pre‐development peak flow rates (C=0.65) or the allowable (C=0.70) runoff rates based on area plan T18‐40 page 14 of 17; and,
• Provide ‘normal’ (level 2) water quality treatment prior to discharge from the subject site.
4.3.1 Quantity Control
The water quantity control requirement for the subject site can be achieved through a combination of rooftop/surface attenuation and underground storage. Based on preliminary modelling, it is estimated approximately 65m3 of storage is required to restrict post development peak flows from the subject site to below the pre‐development target of C=0.65. Maximum surface ponding would be limited to 0.3m in paved areas, and maximum roof ponding would be limited to 0.15m through the use of roof scuppers. Modeling using hydraulic modeling software such as PCSWMM would need to be conducted during the detailed design stage to ensure any proposed SWM system adheres to the aforementioned criteria set forth by City of London.
4.3.2 Quality Control
The water quality control requirement can be achieved through the installation of one or more oil‐grit separators on the proposed private storm sewer system. Oil‐grit separators are recommended in the MECP Stormwater Management Planning and Design Manual (March 2003) for sites less than 5.0 ha in size. Sizing of the any proposed oil‐grit separator(s) would be conducted at the detailed design stage. Routine maintenance is critical for oil‐grit separator unit(s) to continue to function per design. Based on site constraints and anticipated underlying soil conditions, no low impact development measures are proposed at this time.
Preliminary Servicing Report Job No.: DEL19-024 Proposed Mixed use Commercial and Residential Development – 1674 Hyde Park Road June 14, 2019
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4.3.3 Erosion and Sediment Control
Complementary to the site servicing and grading design, erosion and sediment control (ESC) details are to be included with the Site Engineering design. Measures will be proposed to mitigate the offsite migration of sediments by incorporation of various best management practices and control measures. Such controls include silt fencing, straw bale barriers for inlet grate protection (CBs, and CBMHs), construction entrance mud mats, robust silt barriers in concentrated flow routes, tree preservation fencing and straw coconut erosion control blanket treatment of significant fill/cut slopes. The control measures to be implemented on site should include:
• Installation of silt control fencing around the site perimeter at down‐gradient locations; • Preventing silt or sediment laden runoff from entering inlets (catchbasins / catchbasin
maintenance holes) by wrapping their tops with filter fabric and incorporating straw bale filters (flow checks);
• Maintaining sediment and erosion control structures in good repair (including periodic cleaning as required) until such time as the Engineer or City of London approves their removal;
• Incorporation of temporary measures at site construction entrances to minimize tracking of mud and debris onto municipal road allowances; and,
• Scheduling of critical conveyance works during forecasts of little to no precipitation. Detailed ESC plans will be provided for review by the City of London at the site plan approval stage.
4.4 TRANSPORTATION
The proposed site plan concept includes two (2) driveway connections, one existing joint connection point from Hyde Park Road and an additional proposed connection point to North Routledge Park aligned with the proposed entrance to 1600 Hyde Park Road as per pre‐consultation comments provided by the Transportation Division. Other details concerning access arrangement will be made during site plan approval.
4.5 NOISE ATTENUATION
Hyde Park Road is classified as an arterial roadway in the City of London and as such properties adjacent to them are subject to significant road noise. A noise study will be required to be completed during detailed design and submitted to the City of London in support of site plan approval.
CONCLUSIONS AND RECOMMENDATIONS
Based on the preceding information, the following conclusions can be made with regards to servicing of the site at 1674 North Routledge Park in London, Ontario:
• There are existing municipal watermain, storm sewers and sanitary sewers available to service potential development of the subject site and will require connections to existing infrastructure on North Routledge Park and Hyde Park Road;
• Any potential development of the subject site will require detailed drawing submissions to the City of London;
• It has been noted per an email discussion with Mustafa Almusawi dated May 31, 2019 of the City of London Development Services Division, that there are no concerns with the additional sanitary peak flow from the development as the existing system has capacity to accommodate the additional extra flows and no capacity concerns are anticipated within the impacted sewer segments as a result of the proposed development;
Preliminary Servicing Report Job No.: DEL19-024 Proposed Mixed use Commercial and Residential Development – 1674 Hyde Park Road June 14, 2019
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• The subject site can be serviced for storm by constructing a new connection to the existing 375 mm municipal storm sewer on North Routledge Park;
• On‐site SWM will be required to support development of the subject site. The SWM requirements are anticipated as follows: o Restrict post‐development peak flows from the subject site for all storm events up to and
including the 100‐year design storm event to the lesser of the pre‐development peak flow rates or the allowable runoff rates based on area plan T18‐40 page 14 of 17; and,
o Provide ‘normal’ (level 2) water quality treatment prior to discharge from the subject site. • A detailed noise study will be required to verify impacts of vehicular traffic on Hyde Park Road
on the subject site, to be submitted in support of Site Plan Approval. It is recommended that: • The City of London accepts this report in support of the proposed development and confirms
that servicing strategy therein; • This report be utilized to inform the detailed engineering designed of the subject site.
If you have any questions or concerns, please contact the undersigned. DEVELOPMENT ENGINEERING (LONDON) LIMITED Shawn Duncan, C.E.T Laurence Murray, P. Eng. Senior Designer Senior Project Engineer
APPENDIX A
PRELIMINARY SERVICING FIGURES, SITE PLAN DRAWING AND CITY AS‐BUILT DRAWINGS
12 CARS
EXISTING BUILDING
16 CARS
4 CARS
4 CARS
18 CARS
11 CARS
12 CARS
PRIVATE OUTDOORAMENITY AREA
6 STOREYAPARTMENT BUILDING
LOAD
ING
ROUT
E
R=12 m
2 STOREY
GARBAGEROOM
Existing House
CONCEPT PLAN
1828
1674 HYDE PARK ROAD
A-010
CONCEPT PARKINGPLAN
S.Y.
S.D.AS NOTED
06/13/2019
1 CONCEPT PARKING PLANSCALE = 1:500
PROPOSEDWATERMAINCONNECTION
1674 HYDE PARK
DEVELOPMENT
DEL19-024
1.0
Figure Number
SD
JUNE 12, 2019
London Office
41 Adelaide St. N., Unit 71
(519) 672-8310
Paris Office
31 Mechanic St., Unit 301
(519) 442-1441
450 PVC WM
450 PVC WM
900 CONC. WM
900 CONC. WM
EX.
HYD
EX.
HYD
600 C
ON
C. W
M
30
0 P
VC
W
M
EX.
HYD
EX.
HYD
HYDE PARK ROAD
NO
RT
H R
OU
TLE
DG
E
PA
RK
GA
IN
SB
OR
OU
GH
R
OA
D
900 CONC. WM
450 PVC WM
PROPOSEDSTORM SEWERCONNECTION
1674 HYDE PARK
DEVELOPMENT
DEL19-024
2.0
Figure Number
SD
JUNE 13, 2019
London Office
41 Adelaide St. N., Unit 71
(519) 672-8310
Paris Office
31 Mechanic St., Unit 301
(519) 442-1441
EX
. 3
75
Ø S
TM
HYDE PARK ROAD
NO
RT
H R
OU
TLE
DG
E P
AR
K
GA
IN
SB
OR
OU
GH
R
OA
D
EX
. 6
75
Ø S
TM
EX. 750Ø STM
E
X
.
7
5
0
Ø
S
T
M
EX
. 7
50
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TM
EX
. 7
50
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TM
E
X
. 6
0
0
Ø
S
T
M
EX.
ST-1
EX.
ST-3
EX.
ST-4
EX.
ST-5
EX.
ST-6
EX.
ST-7
EX.
ST-8
EX.
ST-2
EX.
8S662
EX.
8S661
EX.
8S660
EX.
8S273
E
X
. 1950Ø
S
TM
EX. 450Ø
STM
EX.
8S364
EX
. 600Ø
ST
M
EX. 675Ø STM
STM.
INSP.
MH
OGS
EX. 825Ø STM
EX. 825Ø STM
EX.
8S663
EX.
8S664
EX.
DICB
EX.
DICB11
EX.
DICB10
EX. 300
STUB
PROP.
300Ø
STM
PROPOSEDSANITARY
SEWERCONNECTION
1674 HYDE PARK
DEVELOPMENT
DEL19-024
3.0
Figure Number
SD
JUNE 24, 2019
London Office
41 Adelaide St. N., Unit 71
(519) 672-8310
Paris Office
31 Mechanic St., Unit 301
(519) 442-1441
HYDE PARK ROAD
NO
RT
H R
OU
TLE
DG
E P
AR
K
GA
IN
SB
OR
OU
GH
R
OA
D
EX. 200Ø SAN
EX
. 2
50
Ø S
AN
EX
. 2
50
Ø S
AN
EX
. 2
50
Ø S
AN
EX. 250Ø SAN
E
X
.
2
5
0
Ø
S
A
N
EX
. 2
50
Ø S
AN
E
X
. 2
5
0
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EX
. 3
00
Ø S
AN
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00
Ø S
AN
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. 8
2
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A
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. 8
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5
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. 8
2
5
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S
A
N
SA-2
EX
. 2
50
Ø
SA
N
SA-1
SA-3
SA-4SA-5
SA-6
SA-8
SA-9
SA-10
EX
. 2
50
Ø S
AN
SA-7
EX.
HP34
HP131
HP132
HP450
EX. 200Ø SAN
EX
. 150Ø
PD
C
EX
. 150Ø
PD
C
E
X
.
2
0
0
Ø
S
A
N
PROP. SAN.
INSP. MH
PROP.
200Ø SAN.
EX. 200Ø SAN
HP451
HP452
EX
. 1
50
Ø
PD
C
APPENDIX B
PRELIMINARY FIRE FLOW CALCULATIONS, SANITARY SEWAGE FLOW CALCULATIONS AND SANITARY CAPACITY CONFIRMATION EMAIL.
6/14/2019 1 of 1
Date: June 12, 2019By: Shawn Duncan Checked: Laurence Murray, P.Eng.
Hydraulic Grade Line (Low Level System) = 317.00 m
Elevation of FFE= 272.25 m
Static Pressure at Building before losses= 63.65 PSI
CALCULATE FIRE FLOW DEMAND:
Total flow required for fire protection =
Sprinkler Demand + Hose Stream Demand = 1000+ 250 = 1250.0 usgpm = 1,040.84 igpm
Maximum Day Peak Demand = 174.0 usgpm = 144.89 igpm
Total Flow Required = 1424.00 usgpm = 1,185.73 igpm
CHECK PRESSURE CONSTRAINT:
The watermain should be sized so that the minimum pressure reached during fire flows is 20 psi.
We need to account for pressure losses in the system. The equivalent length method is used below.
Equivalent Length (m)
90.0 m
L/D= 60 D= 200 mm 12.0 m
L/D= 6 D= 200 mm 1.2 m
Total Equivalent Length of pipe and fittings = 103.2 m
Calculate the frictional head loss in the equivalent length of pipe using the Hazen-Williams Formula:
f = 0.2083 (100/C)1.85 x Q1.852/di4.8655 where f is in m of water/100 m of pipe, C is unitless, Q is in usgpm, di is in inches
C = constant for inside roughness of pipe 110
Q = flow in usgpm = 1424.0 usgpm
di = inside diameter of pipe = 200 mm
f = friction head in m of water per 100 m of pipe = 5.2719 m water / 100 m of pipe
Total head loss = 5.2719 x 103.2/100 = 5.44064 m
Pressure drop in equivalent length of pipe = 5.44 m = -7.73 psi
55.92 psi
CHECK VELOCITY CONSTRAINT:
The watermain should be sized so that the maximum velocity shall not exceed 2.4m/s during fire flows (City of London specification)
V = Q/A A = pi (D/2)2 Q = 1424.0 usgpm = 0.08984044 cu.m/s
D = 300 mm
A = 0.0707 sq.m
V = 1.27 m/s
Velocity during fire flow is less than 2.4 m/s, therefore the velocity constraint is met.
CHECK STATIC PRESSURE AT THE PROPOSED MIXED RESIDENTIAL AND COMMERCIAL DEVELOPMENT BASED ON CITY PRESSURE ZONE HGL
As outlined in NFPA 13 - Installation of Sprinkler Systems, a hose stream demand is to be considered for fire fighting as well. We will assume an ordinary hazard occupancy for the residential appartment (to be conservative). Ordinary Hazard occupancy requires a hose stream demand of 250 usgpm.
FIRE FLOW WATERMAIN CALCULATIONS - SPRINKLERED BUILDINGDEL19-024 - 1674 HYDE PARK ROAD, LONDON, ONTARIO
A new sprinkler system will be installed throughout the proposed residential appartment buildings. The project mechanical engineers have not provided a sprinkler demand at the time of this calculation. A conservative demand of 1000 usgpm has been used in lieu of actual demands for the purpose of this calculation
Length of 200 dia water service to proposed building addition=
300x300x200 Tee (flow through branch)
Check velocity in 300mm municipal watermain:
200 Gate Valve (fully open)
(C=110 for a 200 dia pipe as per City of London Standards)
Residual pressure at proposed school addition finished floor =
190415 - DEL19-024 - Fire Protection Calcs - SPRINKLERED.xlsx
Date: June 12, 2019By: Shawn Duncan Checked: Laurence Murray, P.Eng.
145 0.475 230 1.1 0.10 1.781 0.048 1.83* Assumed population of Ex. Commercial Building per OBC - 8.2.1.3. Sewage System Design Flows - Shopping = 5 L / 1m2 Floor Area
Building Name BLDG Area (m2) L / m2 Total Litres Building Name Units Pop/Unit Total PopulationEx. Commercial Building 597 5 2,983.00 Prop. Apartment Building 55 2.4 132
Total Litres 2,983.00 Total Pop. 132Per Capita Flow 230
Pop. Equiv. 13
PEAK SANITARY CALCULATIONS DEL19-024 - 1674 HYDE PARK ROAD, LONDON, ONTARIO
PopulationPer Capita Flow
(L/s)
Uncertain
Development Factor
Infiltration Flow
(L/s/Ha)Sewage (L/s)Area (Ha)
Infiltration
(L/s)Total (L/s)
1
Shawn Duncan
From: Almusawi, Mustafa <[email protected]>Sent: Friday, May 31, 2019 1:14 PMTo: Shawn DuncanSubject: 1674 Hyde Park Road
Hi Shawn, As discussed, there is capacity for the proposed 6-storey, 50 unit apartment building even though these are commercial lands and the proposed development was never contemplated. It is noted that the proposed apartment building takes more capacity than the area plan allows but the system has the room to accommodate the extra flows. Best Regards,
Mustafa Almusawi Senior Technologist Development Services City of London
300 Dufferin Ave., London ON N6A 4L9 P: 519.661.CITY (2489) x 8409 | Fax: 519.661.3501 [email protected] | www.london.ca
