Tech Spec

LOVE

His Majesty's Government of Nepal

Ministry of Water Resources

Department of Irrigation

SIKTA IRRIGATION PROJECT

Nepalgunj, Banke

BIDDING DOCUMENTS for

CONSTRUCTION OF HEADWORKS

VOLUME 2 Contract No: SIP/HW/ICB/01

Contents:VOLUME 1

Section I-Invitation for Bids

Section II-Instruction to Bidders

Section III-Bidding Data

Section IV-Part - 1: General Conditions of Contract

Section V-Part - 2: Conditions of Particular Application

Section VI-Sample Forms of Bid, Appendix to Bid and Bid Security

Section VII-Sample Forms of Agreement, Performance Security and Bank Guarantee and Advance Payment

VOLUME 2

Section VIII -Technical Specifications

Section IX-Bill of Quantities

VOLUME 3

Section X - Drawings

VOLUME 1

Section I-Invitation for Bids

Section II-Instruction to Bidders

Section III-Bidding Data

Section IV-Part - 1: General Conditions of Contract

Section V-Part - 2: Conditions of Particular Application

Section VI-Sample Forms of Bid, Appendix to Bid and Bid Security

Section VII-Sample Forms of Agreement, Performance Security and Bank Guarantee and Advance Payment

VOLUME 2

Section VIII - Technical Specifications

Section IX-Bill of QuantitiesVOLUME 3

Section X -Drawings

VOLUME 2

Section VIII - Technical Specifications

Section IX

-Bill of Quantities and Form for Rate AnalysisSection VIII: Technical Specifications

Table of contents1CHAPTER 1GENERAL REQUIREMENTS1-

21.01Abbreviations1-

21.02Brief Description of the Works1-

21.03Ambient Conditions1-

31.04Drawings1-

31.04.1Bidding Drawings1-

31.04.2Additional Drawings1-

31.04.3Drawings and Calculations to be furnished by the Contractor1-

41.04.4Right to Change Design and Drawings1-

51.04.5As-Built Drawings1-

51.04.6Measurement and Payment1-

51.05Setting-Out and Survey of the Works1-

61.06Layouts and Schedules Provisional1-

61.07Existing Irrigation System and Flow to be Maintained1-

71.08Temporary Works1-

71.09Cofferdams1-

81.10Notice of Operations1-

81.11Suppliers of Materials1-

81.12Natural Materials1-

81.13Disruption of Local Communities1-

81.14Clauses Not Applicable1-

81.15Delay and Increased Costs Due to Floods, Wash-out of Roads or Impassable Roads1-

81.16Supply of Fuel Oils1-

91.17GENERAL ITEMS / Engineer's REQUIREMENTS1-

101.18Assistance to Engineers Staff1-

101.19Standards and Supplemental Specifications1-

111.20Construction Programme1-

131.21Reports, Meetings and Data of the Works1-

131.21.1Monthly Report1-

131.21.2Site/Work Meetings1-

131.21.3Photographs1-

131.21.4Audits by the Employer1-


141.22Protection of Real Estate1-

141.23Safety Measures and Public Convenience1-

151.24Existing Cables, Pipe-Lines and Works1-

151.24.1Drawings1-

151.24.2Information and Instructions1-

151.24.3Precautions1-

151.24.4Interference with Existing Works1-

161.25Temporary Fencing1-

161.26Notice Board1-

161.27Clean Up the Site1-

171.28Contractors Temporary Facilities1-

171.28.1Contractors Offices, Workshops, Quarters, etc.1-

171.28.2Laboratory and Laboratory Equipment1-

181.28.3Sanitation1-

181.28.4Medical Arrangements and First Aid Facilities1-

181.28.5Recreation1-

191.28.6Fire Protection1-

191.28.7Lighting1-


191.29Contractors Transport1-

191.30Construction and Maintenance of Temporary Access Road1-

201.31Disposal and Care of Ground/Surface Water, Dewatering Foundations and Temporary Diversions1-

201.31.1General1-

211.31.2Dewatering Foundations1-

211.31.3Temporary Diversion Works1-


221.32Exploratory Boring and Excavation of Test Pits1-

221.33Materials and Supplies to be New and Unused1-

221.34Environmental Protection Works1-

231.34.1Borrow/Quarry Sites1-

241.34.2Disposal of Spoil and Construction Waste1-

241.34.3Provision and Maintenance of Camps, Offices, Stores, Equipment Yards and Workshops1-

241.34.4Crushing Plants1-

241.34.5Hazardous Materials1-

251.34.6Reinstatement of Environment1-


251.34.8Existing Settlements and Burial Grounds1-

251.35Insurances1-

251.35.1Insurance of Works1-

261.35.2Third Party Insurance1-

261.35.3Insurance Against Accident to Workmen1-

261.36Traffic1-

261.36.1Traffic Safety and Control1-


261.37Temporary Diversions for Traffic1-

261.37.1Provisions of Diversions1-

271.37.2Survey beacons and Monuments1-

271.37.3Access to Properties1-

271.37.5Public Services1-

271.37.6Width of Diversions1-

271.37.7Temporary Drainage Works1-

271.37.8Earthworks for Diversion1-

271.37.9Maintenance of Diversions1-

281.37.10Removal of Diversions1-

281.37.11Measurement and payment1-

281.38Maintenance of Road1-

1CHAPTER 2SITE CLEARANCE AND REMOVAL OF EXISTING STRUCTURES2-

22.1Clearing, Grubbing and Tree Removal2-

22.1.1Clearing and Grubbing2-

22.1.2Tree Removal2-

32.2Notice of Commencement2-

32.3Stripping of Top Soil2-

42.4Removal of Existing Structures2-

1CHAPTER 3EARTHWORKS3-

23.1Excavation3-

23.1.1General3-

23.1.2Disposal of Excavated Materials3-

33.1.3Excavation in Main Canals3-

33.1.4Excavation in Natural Rivers3-

43.1.5Excavation in Drains3-

43.1.6Excavation for Structures3-

53.2Embankments3-

53.2.1General3-

63.2.2Borrow Areas3-

73.2.3Embankment Construction3-


83.2.5Field Embankment Tests3-

93.2.6Soil Sampling and Testing3-

93.3Backfill for Structures3-

103.4Tolerances3-

103.5Haulage of Excavated and Borrowed Materials more than 200 m3-

113.6Turfing3-

113.6.1General3-

113.6.2Material3-

113.6.3Construction3-


1CHAPTER 4GRAVEL METALLING WORKS4-

24.1General4-

24.2Materials4-

24.3Source of Material and Delivery4-

24.4Stockpiling4-

34.5Preparation of Formation4-

34.6Laying, and Compacting Gravel Wearing Course4-

44.7Weather Limitations and Defective Material4-

44.8Quality control4-

44.9Grade and Alignment Control4-

44.10Tolerances4-

44.10.1Tolerances in Surface Levels4-

44.10.2Tolerances in Surface Regularity4-

54.10.3Rectification4-

54.11Measurement and Payment4-

1CHAPTER 5 CONCRETE WORKS5-

25.1General5-

25.1.1Standards and Codes of Practice5-

25.1.2Drawings, Calculations and Method Statements5-

25.1.3Costs of Testing and Sampling of Concrete and Concrete Materials5-

25.1.4Failure to Meet Specified Requirements5-

35.2Materials5-

35.2.1Cement5-

45.2.2Aggregates5-

75.2.3Water5-

85.2.4Chemicals in Concrete5-

85.2.5Admixtures5-

105.3Concrete Properties/Tests and Placing /Compaction5-

105.3.1Concrete Properties and Tests5-

165.3.2Placing and Compaction5-

215.3.3Measurement and Payment of Concrete5-

225.4Plum concrete5-

225.5Formwork5-

225.5.1General5-

235.5.2Materials for Formwork5-

245.5.4Dimensional Tolerances5-

245.5.5Cleaning and Re-using of Shuttering5-

245.5.6Removal of Forms5-

255.5.7Finishing of Concrete5-


265.6Reinforcement Steel5-

265.6.1Material and Tests5-

275.6.2Storage of Steel Reinforcement5-

275.6.3Preparation of Reinforcement Drawings5-

275.6.4Bending of Steel Reinforcement5-

285.6.5Placing Reinforcement Steel5-

285.6.6Splicing of Reinforcement Steel5-

295.6.7Cover to Reinforcement Steel5-

295.6.8Measurement and Payment of Reinforcement Steel5-

305.7Steel Construction and Other Items to Be Cast-In5-

305.8Pre-cast Concrete Units5-

305.8.1General5-

315.8.2Pre-cast Construction Alternative5-

315.8.3Pre-casting of Concrete Units5-

325.8.4Perforated Pre-cast PCC Pipes5-

345.9Joints5-

345.9.1General5-

365.10PVC Waterstops5-

365.10.1Scope5-

365.10.2Material5-

365.10.3Workmanship5-


375.11Dowel Bars5-

375.12Joint Filler5-

385.13Joint Sealer5-

385.14Bitumen Joint Coating5-

1CHAPTER 6PROTECTION WORKS6-

26.1Stone Works6-

26.1.1Materials6-

26.1.2Dry Stone Pitching6-

26.1.3Rubble Boulder Apron / Rip Rap Stone6-

36.2Gabion Mattresses6-

36.2.1Materials6-

36.2.2Construction of Gabions6-

56.2.3Testing6-


66.3Concrete Block Pitching6-

66.3.1Materials6-


66.4Geo-textiles6-

76.5Gravel Filter6-

1CHAPTER 7METAL WORKS7-

27.1General7-

27.1.1Standards of Materials and Workmanship7-

27.1.2Welding7-

27.1.3Weldable Structural Steel7-

37.1.4Plate, Sheet and Strip7-

37.1.5Steel Forging7-

37.1.6Testing Steel7-

37.1.7Dimensions of Standard Rolled Steel Sections7-

37.1.8Nuts and Bolts7-

47.1.9Fixing and Building-in7-

57.2Protection of Metalwork7-

57.2.1Galvanising7-

57.2.2Shearadising7-

57.2.3Shop Cleaning and Painting7-

67.2.4Supply of Paint and Painting at Site7-

67.2.5Paint7-

77.2.6Painting during Erection7-

87.3Handrail for Structures7-

87.4Aluminium Staff Gauging Plate7-

97.5Trash Rack7-

97.6Embedded Metalworks7-

107.7Metal Ladder and Step7-

107.8Galvanized open steel flooring including supporting steel work and fixing

117.9Steel plates to as covers to pressure relief manholes (750*550*12mm )7-

117.10Perforated steel plates to Fish pass ( 2000mm *1200mm *12 mm )7-

117.11 Flexible Neoprene Flap valve7-

117.12Threaded cap in stainless steel socket for 110 mm dia pipes7-

127.13Gate valve, pipe work and other arrangement to fish pass7-

1CHAPTER 8WATER CONTROL EQUIPMENT8-

28.1Gates and Gate Hardware8-

28.1.1Design, Drawing and Data8-

28.1.2Design to Suit Climate8-

28.1.3Materials, Stresses and Workmanship8-

28.1.4Minimum Thickness8-

38.1.5Gate Design8-

38.1.6Framing and Gear Supporting Members8-

38.1.7Gate8-

38.1.8Operating Gear8-

48.1.9Bolted Joints8-

48.1.10Field Connections8-

48.1.11Standardisation and Maintenance8-

58.1.12Advance Delivery of Anchor Members, etc.8-

58.1.13Preparation and Storage of Bolts8-

58.1.14Packing and Marking8-

58.1.15Erection at Place of Manufacture8-

68.1.16Inspection at Place of Manufacture8-

68.1.17Instructions for Site Erection8-

68.1.18Operating and Maintenance Manuals8-

68.1.19Spare Parts, Special Tools, etc.8-

78.1.20Storage of Fabricated Metalwork8-

78.1.21Erection of Metalwork8-

78.1.22Testing after Erection8-

78.1.23Painting of Gates8-


88.2Wheel and Axle type Lifting Gates for Intake and Flushing Sluice Structures8-

88.2.1General8-

88.2.2Embedded Parts8-

98.2.3Gates, Wheel and Axles8-

98.2.4Operating Gear and Platforms8-

1CHAPTER 9MISCELLANEOUSWORKS

9-

29.1uPVC Pipe9-

29.2PVC Pipe for Weep Holes9-

39.3PVC Pipe for Drains9-

39.4Bearing Plate for Slab Bridge9-

39.5Automatic mechanical water level recorders including lockable, waterproof cabinets and all fittings9-

39.6Water Level Device on bridge abutment9-

1CHAPTER 10 ENGINEERS REQUIREMENTS

10-

210.1Operation and Maintenance Complex10-

210.2Gate keeper houses10-

310.3Survey Equipment for the Engineer10-

310.4Supply of transport for the Engineer and the Employer10-

410.5Supply and instalment of movable telephone system10-

510.6Procurement of Project facilities10-

510.7Measurement and Payment10-

sECTION IX bill of quantitiesIX-1

A. Preamble ...................................................................................IX-3

B. Dayworks schedule ...................................................... IX-5

C. Bills .........................................................................................IX-7

D. SAMPLE FORM FOR UNIT RATE ANALYSIS.................IX-19CHAPTER 1GENERAL REQUIREMENTS

CHAPTER 1GENERAL REQUIREMENTS1.01Abbreviations

The following abbreviations are used in this specification :

kmKilometre

lin

linear

m

metre

cu.

cubic

mmmillimeter

sq.

square

ha

hectare

g

gram

m2, sq.msquare metre

t

tonne

mm2Square millimeter

l

litre

m3,cubic metre

ml

milliliter

Nonumber

s

second

%

per cent

min

minute

0C

degree Centigrade

NS

Nepal Standard

kg

kilogram

BS

British Standard

N

newton

IS

Indian Standard

kNkilonewton

CP

British Code of Practice

ISOInternational Standard

ASTM

American Society

Organization

for testing and MaterialsUS $Currency of USA

NRs

Nepalese Currency VMVehicle Month

1.02Brief Description of the Works

The Sikta Irrigation Project lies in Banke District in the Terai of the Mid-Western Development Region of Nepal, some 500 km west of Kathmandu generally as shown in Drawing Nr SIP/HW/ICB/01. The works mainly comprise the construction of Headworks for the irrigation of 34,000 ha of land in Banke District. The headworks will be constructed at Agaiya, nearly 20 km west from Kohalpur and located adjacent to the East West Highway.The construction works include

A reinforced concrete structure for the construction of 317 m long diversion barrage comprising a bridge across the Rapti River at Agaiya, Banke.

Guidebunds of about one km length made of earthworks in filling and gabion along the both banks of the Rapti River in the upstream and downstream of the Headworks at Agaiya.

RCC head regulators on right and left banks of the Rapti River offtaking 62.5 cumecs and 2.5 cumecs respectively to be constructed at Agaiya. A settling basin of about 625 m length with concrete bed and side walls to be constructed at Agaiya. Bank Protection Works, and RCC barrel structures for 5 numbers of drainage crossing, to be constructed at Agaiya of Banke District.1.03Ambient Conditions

The annual climatic cycle consists of the dry season from November to May, the wet season being the remaining months of the year. Shade temperature will normally vary between 5O and 40OC. Annual rainfall in Nepalgunj is around 1329mm, most of which falls as intense rain during the wet season. Humidity in monsoon is as high as 80 100 %.1.04Drawings

1.04.1Bidding Drawings

The drawings provided in Volume III of the Bidding Documents shows the general features of the Headworks and related structures. Additional drawings may be delivered to the Contractor prior to the commencement of the works in accordance with Clause 14.1 of the Conditions of Contract Programme to be submitted. The Contractor shall prepare construction and/or shop drawings as stipulated in Sub-Clause 1.04.3 of these Specifications.1.04.2Additional Drawings

The drawings attached to the Bidding Documents (hereinafter referred to as Bidding Drawings) accompany and form part of the Contract Documents. In addition to the Bidding Drawings, Additional Drawings may be delivered by the Engineer to the Contractor and such drawings shall thereupon become part of the Contract.

During the progress of the work, Additional Drawings will be issued by the Engineer prior to commencement of the Works and as necessity arises to supplement and/or supersede the Bidding Drawings, and such Additional Drawings shall thereupon become part of the Contract.

The Contractor shall be governed by figures and dimensions as given on the drawings. Where required dimensions are not shown, the Contractor shall obtain such dimensions from the Engineer before proceeding with the construction of the portion of the Works to which they refer. In every case, detailed drawings shall take precedence of general drawings.

The Contractor shall scrutinise such drawings and such further drawings issued from time to time to the Contractor. If any ambiguity, discrepancy or mistake is found in the drawings, the same shall be referred to the Engineer before proceeding with the works, and the Engineers decision on resolving such ambiguity, discrepancy or mistake shall be final, conclusive and binding.

1.04.3Drawings and Calculations to be furnished by the Contractor

Unless otherwise stated in the Contract, the Contractor shall prepare drawings for all Temporary Works to be constructed or supplied and installed by the Contractor or his Sub-Contractor.

The Bidding Drawings and the Additional Drawings delivered by the Engineer will not always be detailed enough for performance of the works. They will show many works only in typical forms supplemented by tables of dimensions. The Contractor shall at his own expense prepare detailed Construction Drawings of the individual works (hereinafter referred to as Construction Drawings) based on the Bidding Drawings and the Additional Drawings as needed for performance of the works. All Construction Drawings prepared by the Contractor shall be submitted to the Engineer for his approval.If required by the Engineer, the Contractor shall also submit calculations to the Engineer for his approval. The drawings submitted by the Contractor shall be clear and complete. The recommendable scales of the drawings are 1:1,000, 1:100, 1:50, 1:20, 1:10, 1:5, 1:2 or 1:1 depending upon the type of drawing and/or details which have to be drawn. Drawings shall be of standard sizes as required by the Engineer.

In addition to the above, the Contractor shall at his own expense prepare reinforcement drawings based on the drawings supplied by the Employer/Engineer as needed for the performance of the works. These reinforcement drawings shall include such bar placing drawings, bar-bending drawings, bar list and any other reinforcement drawings as may be required to facilitate fabrication and placement of reinforcement bars. All reinforcement drawings prepared by the Contractor shall be submitted to the Engineer for his approval.

For all sections of the work to be executed under the Contract, the Contractor shall submit detailed drawings to the Engineer for his approval, including working drawings, shop drawings and specifications. The Contractor shall submit these drawings in four (4) copies to the Engineer for approval unless otherwise specified, and these drawings shall be sufficiently detailed to show:

(a)The general arrangement and dimensions of all the parts and the size of each and every part of the works to be executed under the Contract.

(b)The nature of the materials from which various parts are to be made, and

(c)Details of all construction.

Fabrication, manufacture or construction of any part of the works shall not commence until the drawings have been approved in writing by the Engineer, and thereafter no change shall be made to any drawings so approved without permission of the Engineer. Subsequent changes shall be reported by sending another set of four (4) or specified number of copies of each revised drawing to the Engineer for approval. The approval of Contractors drawings by the Engineer shall not relieve the Contractor from any of his liabilities or responsibilities under the Contract.

The Engineer shall check or review the drawings submitted by the Contractor and shall return them with comments or approval within fourteen (14) days from the date of submission by the Contractor. If re-submission of the drawings is required by the Engineer, the Contractor shall re-submit them after necessary modifications and corrections until the approval of the Engineer is obtained. In the event of disagreement with alteration, the Contractor shall send a written notice to the Engineer within 7 days after receiving the altered drawing(s).

From the approved drawings and calculations, four paper copies and one reproducible copy of each set shall be submitted to the Engineer.

1.04.4Right to Change Design and Drawings

When additional information regarding foundation or conditions become available as a result of excavation work and further testing, and if found desirable to make changes in the alignment, cross-sections, dimensions or design to conform to such conditions, the Employer/Engineer reserves the right to make the necessary or desirable changes to the opinion of the Engineer.

1.04.5As-Built Drawings

The Contractor shall submit whole sets of As-Built Drawings of the completed Works, one (1) set comprising one (1) negative drawings of high quality reproducible polyester transparent Mylar film (or similar material) from which clear copy can be made and three (3) clearly printed drawings along with two sets of CD, to the Employer before the expiration of Defect Liability Period.

The As-Built Drawings shall clearly show the lines and dimensions of the permanent construction actually made based on the original design and/or change of design from time to time ordered by the Engineer or proposed by the Contractor and approved by the Engineer.

1.04.6Measurement and Payment

No separate payment shall be made for preparation of all construction drawings, reinforcement drawings, working drawings and shop drawings, drawing details, etc., to be prepared by the Contractor and submitted to the Engineer and/or the Employer in accordance with the provisions of the Contract, except for provision of As-Built Drawings.

All costs including Contractor's margin, overhead, taxes, etc, incurred by the Contractor to provide and submit As-Built Drawings shall be deemed to be included in the lump sum price for item K-10 of the Bill of Quantities.

1.05Setting-Out and Survey of the Works

The Contractor shall re-survey the Base Lines, Traverse Points, Bench Marks and confirm the co-ordinates and levels of the Stations before using them for setting out the Works. The Contractor shall immediately notify the Engineer of any discrepancies and shall agree with the Engineer any amended values to be used in the Contract, including replacement of any Stations missing from the original location.

The Contractor shall employ well-qualified and experienced surveyors for the execution of survey and setting-out works. The instruments to be used shall be of a make and type suitable for the intended works and shall be subject to Engineers approval.

The Contractor shall be responsible for the setting-out centre-lines, longitudinal and cross sections of the ground, and position of the structures in accordance with the drawings, and any other setting-out work necessary for the execution of the Works. Before commencing the works for structures, drains etc, the Contractor shall survey and take levels for longitudinal profile and cross sections along the routes/locations in which the works are to be executed out at his own expenses. The Contractor shall use benchmarks approved by the Engineer for such survey works. The surface levels so determined shall be subject to the approved surface levels.

The demarcation of right-of-way and all-necessary preparation connected with it shall be carried out by the Employer.

Along structures, drains, or combination thereof and roads, the Contractor shall install temporary benchmarks at intervals of 250m. Their distance from the centre-line shall be as instructed by the Engineer. The difference in double-levelling as executed for the levelling of the temporary benchmarks shall not exceed 5 mm times the square root of the length of the circuit in km. Ground levels shall be taken jointly by the contractor and the Engineer's representative both prior to commencing and after completion of earth works.

The Contractor shall level and draw the followings for all structures canal, drains, bunds and roads:

longitudinal section

cross-sections at an interval not exceeding 25 m before and after the execution of the Works. The formation level shall be taken as reference while cross-sections shall cover at least a width as necessary for the Works to be constructed, including related earthworks.

All field-books, calculations, maps, etc. of the survey activities shall be handed over to the Engineer, immediately after the completion of the survey. All field data, derived from the survey activities, entered in the field-books that are handed over to the Engineer, shall also be entered into EXCEL spreadsheet or a compatible spreadsheet in a format approved by the Engineer. The data shall be submitted on a CD.

No separate payment shall be made to the Contractor for the works to be carried out under this Sub-Clause.

1.06Layouts and Schedules Provisional

The locations, levels and dimensions as shown on the Drawings or given in the design data or structure schedules are subject to amendment. The Contractor will be required to undertake surveys for confirmation of alignment and levels of approach channels, flood embankments, and river bank protection, as detailed in Chapter 6. Details of any such amendment or confirmation of the original design will be given by the Engineer or the Engineer's Representative during the course of construction.

1.07Existing Irrigation System and Flow to be Maintained

The Contractor shall provide all Temporary Works and do all things which may be necessary to maintain those parts of the existing irrigation and drainage system which may be affected by these operations in a condition not less satisfactory than they were prior to the commencement of the Works and shall maintain the normal irrigation supplies therein except when written permission to vary the supplies has been obtained from the Engineer.

When ordered by the Engineer the Contractor shall make connections and carry out such other works as may be necessary to transfer the supply of irrigation water between the existing system of canals and the system constructed under the contract. The Contractor shall submit to the Engineer his detailed proposals for carrying out this work.

The Contractor shall not start the work without the written approval of the Engineer and the cost of all such Temporary Works and all other charges arising from compliance with this Clause shall be deemed to be included in the Contract Rates.

1.08Temporary WorksNot less than fourteen days before commencing any portion of the Works, the Contractor, if ordered, shall submit to the Engineer for his approval complete drawings of all Temporary Works the Contractor may require for the construction of that part of the Works.

Notwithstanding approval by the Engineer of any design for the Temporary Works the Contractor shall be entirely responsible for their efficiency, security and maintenance and for all obligations and risks in regard to such temporary Works which are specified or implied in the Contract.

Except where specific items are provided in the Bill of Quantities, the cost of all Temporary Works of every description, including de-watering, temporary diversions of canals, drains, roads, and all services shall be included in the Contracts' Rates.

1.09Cofferdams

The term "cofferdam" denotes any temporary or removable structure, constructed to hold the surrounding earth, water, or both, out of the excavation, whether such structure is constructed of earth, timber, steel, concrete or any combinations of these. The term includes earth dikes, timber cribs, sheet piling, removable steel shells and all bracing; and it shall be understood to include excavation enclosed by pumping wells and well points. The cost of cofferdams is always to be included as part of the bid price for the structure.

The Contractor shall submit, upon request of the Engineer, Drawings showing his proposed method of cofferdam construction. Approval of the Drawings by the Engineer will not in any way relieve the Contractor of the responsibility for the adequacy of the design for strength and stability or for the safety of the people working therein.

The interior dimensions of cofferdams shall be such as to give sufficient clearance for the construction and removal of any required forms and the inspection of the interior and to permit pumping outside the forms.

Material deposited within the stream area from foundations or other excavations shall be removed if, in the opinion of the Engineer, it obstructs the stream channels.

Unless otherwise provided, cofferdams shall be removed after the completion of the sub-structure. The removal shall be effected in such a manner as not disturb or mar the finished work. The Engineer may order the Contractor to leave any part or the whole or the cofferdam in place.

When conditions are encountered which, in the opinion of the Engineer, render it impractical to de-water the foundation before placing the footing, the Engineer may require the construction of a concrete foundation or seal of such dimensions as he may consider necessary, and of such thickness as to resist any possible uplift. the concrete for such a seal shall be placed as shown in the Drawings or required by the Engineer. The foundation shall then be de-watered and the footing placed.

Cofferdams shall be constructed so as to protect newly-cast concrete from suddenly rising water and to prevent damage to the foundation by erosion.

1.10Notice of Operations

The Contractor shall give full and complete written notice of all important operations, including setting out, to the Engineer sufficiently in advance to enable the Engineer to make such arrangements as the Engineer may consider necessary for inspection and for any other purpose. The Contractor shall not start any important operation without the written approval of the Engineer.

1.11Suppliers of Materials

Before ordering a material for any description intended for the Permanent Works, the Contractor shall submit for the approval of the Engineer the name of the maker or supplier proposed and details of the place of origin and specification of the material. If requested by Engineer, the Contractor shall supply to the Engineer for his retention a copy of any such order place.

1.12Natural Materials

The Contractor shall make all arrangements for locating, selecting and processing natural materials to comply with the Specification and shall submit to the Engineer for approval full information regarding the proposed location well in advance of commencement of working of the materials. Approval of a source does not imply that all material in that source is approved.

1.13Disruption of Local Communities

The Contractor shall take all measures necessary to avoid nuisance and disruption to local communities. In particular the Contractor shall ensure no damage is done to crops, pasture or woodland and outside the area for which the Engineer's approval for land clearance has been given, that all irrigation supplies to such areas are maintained and that the Contractor's operations do not cause flooding or pollution hazards.

1.14Clauses Not Applicable

Any Clause in the Specification which relates to work or materials not required by the Bill of Quantities or subsequently ordered in accordance with Clause 51 of the Conditions of Contract shall be deemed not to apply.

1.15Delay and Increased Costs Due to Floods, Wash-out of Roads or Impassable Roads

Notwithstanding Clause 44 of the Conditions of Contract no extension of time or increase in the Contract Rates shall be granted to the Contractor if he is delayed or impeded in the completion of the Works or involved in additional costs by flood, high river water levels, wash-out of roads or tracks or impassable roads.

1.16Supply of Fuel Oils

The Contractor shall be responsible for arranging and ensuring that adequate supplies of high speed diesel oil, motor spirits, kerosene, lubricants and other petroleum produces are available at all times to meet his requirements for the purposes of or in connection with the contract; the Contractor's particular attention is drawn to this requirements as from time to time shortages and interruptions in the supply of fuel oils, etc occur in the region.1.17General Items / Engineer's RequirementsProvisional Sums have been allowed for the payment of costs associated with the provision, furnishing, equipping and maintenance of offices, laboratories and accommodation for the engineer; provision of vehicles, generators, and supply of fuel, insurance, maintenance, repair and servicing for these vehicles and for existing Engineer's transport; and, provision, insurance maintenance, repair or replacement of office, communications, and survey equipment.

All costs including Contractors margin, overhead, taxes etc, incurred by the Contractor to provide, construct, supply, fabricate, erect, instal in accordance with the specifications mentioned elsewhere, shall be deemed to be included in the rates/price quoted in the Bill of Quantities of the respective items. No Contractors margin and overhead shall be provided for the items for which the provisional sums have been allocated in the Bill of Quantities. All facilities shall be ready for occupation by the Engineer within three months after receiving the instruction. During this period, the Contractor shall provide temporary accommodation to the Engineer's satisfaction in the vicinity of the works.

The additional facilities shall be constructed as directed by the Engineer to the full satisfaction of the Engineer on land provided by the Employer. The contractor shall, before commencing the erection of the buildings, submit drawings showing plans, construction principles, materials and a proposal for the arrangement of the major laboratory equipment. Materials and workmanship shall be to the best recognized standards for permanent buildings of this type. All vehicles, equipment and furniture shall be new and unused when initially put in place.

The Contractor shall provide competent drivers to the approval of the Engineer. The Contractor shall provide all fuel, lubricants etc. and shall license, insure (as detailed below), service and maintain the vehicles in a roadworthy state. The Contractor shall be obliged to have ready access to spare parts appropriate to the number, type and duty of the vehicles supplied. If in the opinion of the Engineer the Contractor should default in this respect and deprive the Engineer of use of vehicle(s) made unserviceable by normal use in the conditions and demands of the site, the Contractor shall provide suitable alternative transport to the approval of the Engineer. If the Contractor fails to provide this service the Engineer shall be entitled to withhold the issue of Payment Certificate until the service is resumed.

Insurance for vehicles must be comprehensive and include :

(i) cover for the Engineer and his staff driving the vehicle;

(ii) usage on the business of the Engineer and his staff;

(iii) liability to third parties (including passengers whether the Engineer, his staff or others) for an unlimited indemnity in respect of death or personal injury and for the maximum indemnity reasonable obtainable in respect of loss, destruction or damage to property.

The Contractor shall repossess the vehicles at the end of the Defects Liability Period or earlier if ordered by the Engineer.

The facilities and contents, equipment, furniture, vehicles and survey equipment, except those items provided by the Contractor for the proper maintenance of the facilities, will become the property of the Department of Irrigation unless otherwise provided in the Contract Documents.

Temporary offices required in accordance with the works shall be erected, dismantled, moved and re-erected elsewhere from time-to-time as directed by the Engineer.

1.18Assistance to Engineers Staff

The Contractor shall render all necessary assistance to the Engineers staff and shall provide and maintain sufficient number of pegs, poles, paints, survey equipment and tools, straight edges, stagings, moulds, templates, profiles and all other requisites for checking the Contractors setting-out and the measurement of the Works.

The Contractor shall provide such full time or part time surveyors as may be required. The cost of all labourers, surveyors, survey equipment and tools, and materials required by the Engineer and his staff for checking the setting-out and the measurement of the Works shall be covered by the Contractors expense and no separate payment shall be made thereof.

1.19Standards and Supplemental Specifications

Unless otherwise stated in the Contract, all workmanship, materials, and equipment shall comply with the relevant American, British, German, Nepal and Indian Standard or Code of Practice current on the date fixed for receipt of bids. A copy of each relevant Codes shall be supplied by the contractor within 28 days from the dates of commencement of work. Whenever in these documents references are made to particular reference standards or abbreviations thereof, their meaning shall be as listed below and copies of such standards shall be obtained at the Contractors expense from the particular organisation at the address given:

AASHTOAmerican Association of State Highway and Transportation Officials, Suite 341 National Press Building, Washington D.C., 2004, U.S.A.

ACIAmerican Concrete Institute, P.O. Box 4754 Redford Station, Detroit, MI 48219, U.S.A.

AISCAmerican Institute of Steel Construction, 101 Park Avenue, New York, NY 10017, U.S.A.

ASTMAmerican Society for Testing and Materials, 1916 Race St, Philadelphia, PA 19103, U.S.A.

AWSAmerican Welding Society, Inc. 2501 N.W. 7th St., Miami, FL 33125, U.S.A.

AWWAAmerican Water Works Association, 6666 West Quincy Avenue, Denver, Colorado 80235, U.S.A.

BSIBritish Standards Institution

101 Pantonville Road

London NI 9ND, England

DINDeutsche Industrie Norm

(German Industry Standard)

DNADeutsche Norrnenausschuss

Beuth-Vertrieb, Berlin 30

Koln, Federal Republic of Germany

ISOInternational Organisation for Standardisation

1 Rue Devaremble, Geneva, Switzerland

SSPCSteel Structures Painting Council, 4400 Fifth Avenue., Pittsburgh, PA 15213, U.S.A.

U.S. Fed. Spec. United States Federal Specifications

Sales (3FRI) Building 197, Washington,

Navy Yard General Services Administration

Washington, D.C. 20407, U.S.A.

USBRUnited States Bureau of Reclamation

Superintendent of Documents

U.S. Government Printing Office

Washington, D.C. 20.402, U.

Wherever reference is made in the Contract to specific standards and codes to be met by the materials, Plant, and other supplies to be furnished, and work performed or tested, the provisions of the latest current edition or revision of the relevant standards and codes in effect shall apply, unless otherwise expressly stated in the contract. Where such standards and codes are national, or relate to a particular country or region, other authoritative standards which ensure a substantially equal or higher performance than the standards and codes specified will be accepted subject to the Engineers prior review and written approval. Differences between the standards specified and the proposed alternative standards must be fully described in writing by the Contractor and submitted to the Engineer at least 28 days prior to the date when the Contractor desires the Engineers approval. In the event the Engineer determines that such proposed deviations do not ensure substantially equal performance, the Contractor shall comply with the standards specified in the documents.

No separate payment shall be made to the Contractor for complying with this Sub-Clause.

1.20Construction Programme

Within twenty-eight (28) days from the date of Letter of Acceptance the Contractor shall submit to the Engineer for approval a complete and practicable construction programme showing the orderly performance of the Works. The Contractor shall note that the detailed design will be annually completed prior to commencement of construction works to be executed in the next working season. The Construction Programme shall show in detail the proposed method of operations, including purchase and delivery of materials and equipment, as well as the construction. The Construction Programme shall show in a bar chart each major item of the Works and the Temporary Works on separate horizontal lines, sequence of operation and the period required for the completion of each activity. The Construction Programme shall when approved by the Engineer become a part of the Contract.

In amplification of the requirements in Sub-Clause 14.1 of the Conditions of Contract, the particulars supplied by the Contractor with the programme shall include the following details:

(a)a statement giving the numbers and categories of supervisory and technical staff and skilled/unskilled labour to be employed on the Works;

(b)a list and type/details of Contractors Equipment (including vehicles) which the Contractor proposes to employ on the Works stating whether they are to be acquired from inside or outside Nepal, including programmed dates for order and delivery;

(c)a list detailing the purchase and delivery of materials and Plant from both inside and outside Nepal;

(d)details of the Contractors methods of working for all operations including construction by sequence. The programme shall also indicate the proposed temporary flow diversions and arrangements for de-watering illustrating the sequence of various critical stages of construction;

(e)a statement and outline layout giving the proposals for location or locations and sizes of constructional camps, accommodation, offices, workshops and stores at the Site; and

(f)details of the programme for the construction of the works from the date of receipt of the Notice to Commence, including a complete resource allocation showing the number of units and allotted times for each unit of Contractors Equipment, Plant, materials and labour allocated for each part of the works.

The construction programme shall be reviewed and revised if necessary at intervals of not more than six (6) months. In addition, the Contractor shall immediately advise the Engineer of any proposed changes in the Construction Programme. The Contractor shall prepare such programme by the Critical Path Method (CPM) or the Programme Evaluation and Review Technique (PERT) or by a similar type of construction scheduling. The Construction Programme and the revised Construction Programme shall include a schedule of anticipated monthly earnings during, the construction period.

The Contractor shall submit the revised programme within 21 days from the date of the instruction from the Engineer.

No separate payment shall be made to the Contractor for complying with this Sub-Clause.

1.21Reports, Meetings and Data of the Works

1.21.1Monthly Report

The Contractor shall furnish to the Engineer, at the Contractors own costs, at regular monthly interval and in a form and number of copies determined by the Engineer, with the followings:

(i)physical progress for the preceding month and estimated progress for the report month;

(ii)completion schedules (target and actual) based on the approved Construction Programme as provided in Sub-Clause 14.1 of the Conditions of Contract;

(iii)estimated expenditures for the report month;

(iv)inventory of construction equipment and materials on which an advance was made by the Employer as provided in the Conditions of Contract;

(v)a tabulation of construction equipment, listing the major items and pieces of equipment which were utilised for performance of the Works during the preceding month;

(vi)a tabulation of employees, showing the supervisory staff and the numbers of several classes of labourers employed by the Contractor in the preceding month;

(vii)purchase and expenditure report covering the Plant and materials furnished by the Contractor for the Works; and

viii)any report which may be specifically requested by the Employer and/or the Engineer.

1.21.2Site/Work Meetings

The Contractor shall attend all the Site/Work Meetings called by the Engineer.

1.21.3Photographs

The Contractor shall make all arrangements to provide photographs in albums, but not pasted, showing the work progress and shall promptly supply one negative, one electronic copy and four printed copies of such photographs, larger than 8 cm x 12 cm in size, of such portions of the works in progress and/or completed as may be directed by the Engineer. Each print shall contain on its back the date and title of the view taken. The negative of the photographs shall be property of the Employer and no prints from those negatives shall be supplied to any persons without the approval of the Engineer.

1.21.4Audits by the Employer

The Contractor shall note that the Employer shall be entitled at its discretion to conduct audits in respect to:

(a)costs incurred in the event of termination; and

(b)any other costs that the Contractor claims from the Employer which are not specifically covered by the terms of the Contract.

The Contractor shall be obliged to keep accurate up-to-date accounts with records concerning the above items.


No separate payment shall be made for preparation of all documents, correspondence, returns and reports etc., to be prepared by the Contractor and submitted to the Engineer and/or the Employer in accordance with the provisions of the Contract, except for provision of photographs. These photographs shall be the property of the Employer.

All costs including Contractor's margin, overhead, taxes, etc, incurred by the Contractor to provide and submit photographs in accordance with this Sub-Clause shall be deemed to be included in the unit rate per set for Item No. K-9 of the Bill of Quantities.

1.22Protection of Real Estate

The Contractor shall control the movement of his crews and equipment on right-of-way including access routes approved by the Engineer so as to minimise damage to crops and property and shall endeavour to avoid marring the lands. Ruts and scars shall be obliterated and damage to land shall be corrected and the land shall be restored as neatly as practicable to its original conditions.

The Contractor shall be responsible directly to the Employer for any excessive or unnecessary damage to crops or lands resulting from the Contractors operations whether on lands adjacent to right-of-way or on approved access roads and deductions shall be made from payment due to Contractor to cover the amount of such excessive or unnecessary damage as determined by the Engineer.

No separate payment shall be made to the Contractor for complying with the stipulations of this Sub-Clause.

1.23Safety Measures and Public Convenience

The Contractor shall provide necessary protection for all persons and properties at all times. The Contractor shall submit to the Engineer for his approval a Safety Manual with full details of safe construction methods. The Contractor shall comply with the stipulations of the safe construction methods specified in the Safety Manual, to the extent that such provisions do not conflict with the applicable laws. The Contractor shall take all necessary measures to protect the work and prevent accidents during the construction. He shall provide and maintain sufficient night-lights, barricades, guards, temporary sidewalks, temporary bridges, danger signals, watchmen and necessary alliances and safeguards to properly protect life and property. He shall also protect all excavations, equipment and materials so that the public are not be endangered.

The Contractor shall conduct his operations so as to give the least possible obstruction and inconvenience to traffic. Where existing access road or footpaths are not available for detours, traffic shall be permitted to pass through the work with as little delay and inconvenience as possible, unless otherwise authorised by the Engineer.

The Contractor shall also at all times provide convenient access for all entrances to property abutting the Site and shall maintain them in a clean and tidy position.

No separate payment shall be made to the Contractor in complying with the provisions of this Sub-Clause.

1.24Existing Cables, Pipe-Lines and Works

1.24.1Drawings

Drawings with existing power, and pipe-line systems within the Contract area are not enclosed in the Contract Documents. Arrangements for a meeting with the relevant authorities concerning the collecting of data of the systems will be made either by the Employer or by the Engineer. The Contractor and representatives of the relevant authorities shall be present in this meeting. Drawings and/or relevant information with an indication of cables and/or pipe-lines will be made available to the Contractor as far as these cables and/or pipe-lines are directly situated within the Contract area. The Contractor shall send a written request to the Engineer before the Commencement of Works in case this meeting is not arranged.

1.24.2Information and Instructions

Full information and instructions of measures to be taken before and during the execution of the Works, if there are any cable and/or pipe-line systems within the area, will be submitted by the Employer or the Engineer in co-operation with the relevant authorities. In this case, the Contractor shall follow the instructions as given by the Employer or the Engineer.

If necessary, precautions shall be taken by the Contractor to protect the systems during the execution of the Works.

1.24.3Precautions

No excavating machines shall be used in the immediate surroundings of cables and/or pipe-lines, unless approved by the Engineer. Special care shall be taken to ensure that the systems are accessible in case of emergency.

Temporary Works which have to be made in the surroundings of the system during the execution of works, shall be maintained by the Contractor and shall be removed as soon as practicable.

1.24.4Interference with Existing Works

The Contractor shall not interfere in any way with any existing works whether they are the property of the Employer or of a third party and whether the position of such works is indicated to the Contractor by the Engineer or not, except where such interference is specifically described as part of the Works either in the Contract or in the Engineers instructions.

The Contractor shall at his own expense provide and erect to the approval of the Engineer such supports as may be required to protect efficiently all structures or works which may be endangered by the execution of the Works and he shall remove such supports on completion of the Works or otherwise take such permanent measures as may be required by the Engineer to protect the structures or works.

The Contractor is to execute the Works in such a manner that he does not damage or interfere with existing services which are located in proximity to the Site. The Contractor shall be responsible for any damage or interference which may be caused to these services due to execution of the Works and shall carry out all necessary repairs at his own expense and to the satisfaction of the Engineer.

1.25Temporary Fencing

If and where required the Contractor shall erect and maintain suitable and approved temporary fencing to enclose such areas of the works and areas of land occupied by the Contractor within the Site as may be necessary to implement his obligations under Clauses 19 to 24 of the Conditions of Contract. Where temporary fencing has to be erected alongside a public road, footpath, etc., it shall be of the type required by the concerned authorities and shall be erected to their satisfaction.

The Contractor shall fence his labour camps and other compounds and his housing sites in an approved manner so as to exclude all wild or stray animals.

Fences crossed by the Works and forming boundaries of plots outside the area occupied by the Works shall not be cut through or destroyed for more than the distance necessary to permit the erection of new fencing etc, and the Contractor shall make the ends of the cut fences reasonably secure.

The Contractor shall regularly inspect all such fencing, and any defects which may occur, shall be made good without delay. Temporary Fencing shall remain in position until the Works are completed and the Site cleared of all plant, materials and/or other waste matter.No separate payment shall be made to the Contractor for complying with the provisions of this Sub-Clause.

1.26Notice Board

The Contractor shall erect a notice board of a size of not less than 2 m by 3 m at work site. The notice board shall be painted and the description therein shall be approved by the Engineer. The board shall be erected at a suitable place prior to the commencement of the work.

The Contractor shall not erect any advertisement signboard on or along the Site without the written approval of the Employer.

No separate payment shall be made for the provision of the notice board.

1.27Clean Up the Site

Prior to the issue of the latest Defect Liability Certificate by the Employer the Contractor shall remove from the Site all plant and equipment, tools, rubbish, concrete forms, boulders, bricks and other materials not incorporated in the permanent works.

No separate payment shall be made to the Contractor for complying with the provisions of this Sub-Clause.1.28Contractors Temporary Facilities

1.28.1Contractors Offices, Workshops, Quarters, etc.

The Contractor shall be responsible for the land he deems necessary for his offices, stores, warehouse, motor pool, laboratory, workshops, pre-cast concrete factory, staff quarters and labour camp. The Contractor shall be also responsible for construction, maintenance, operation and subsequent removal or handing over if the Engineer requests, of such temporary facilities as his office, stores, warehouse, motor pool, laboratory, workshops, pre-cast concrete factory, staff quarters and labourer camps including feeding and accommodation. These facilities shall be equipped with adequate electricity and potable water supplies.

The Contractor shall submit for approval of the Engineer within fourteen (14) days from the date of the Notice to Commence his detailed plan and/or construction drawings of his offices, stores, warehouse, motor pool, workshops, pre-cast concrete factory, staff quarters and labourer camps that he proposes to construct or rent, including his proposals for water and power supply and sewage facilities. All buildings and facilities shall conform to the Employers standards.

Provided that the Employer arranges the acquisition of the land, the Engineer may request the Contractor to hand over the Contractors temporary facilities to the Employer. The Contractor shall remove and clear the site, other than temporary structures requested by Engineer to the satisfaction of the Engineer. The Contractor shall start handing over his temporary facilities to the Employer after the issuance of Taking-Over Certificate and shall complete it before issuance of Defect Liability Certificate. The handing over shall be made in usable condition and the Contractor shall clean, repair and re-paint the temporary facilities, if necessary, to the satisfaction of the Engineer.

1.28.2Laboratory and Laboratory Equipment

The Contractor shall provide within the premises of the Contractors office a field laboratory with such testing equipment and apparatus as are needed for the performance of the tests specified in the Technical Specifications for the materials and construction of earthworks, concrete, gravel wearing course, etc.

The Contractor shall within twenty-eight (28) days from the date of the Notice to Commence submit a Quality Assurance Plan. The plan shall include testing schedules, list of material sources, quality control procedures and other items as required by the Engineer. The plan shall also indicate testing equipment and consumables. The Contractor shall implement the quality control procedures in compliance with the approved Quality Assurance Plan.

The laboratory provided by the Contractor shall be administrated and maintained by the Contractor, including the supply of electric power and water to the laboratory. The Contractor shall also provide testing equipment and apparatus and furnish all testing staff, labours and consumable necessary for carrying out his testings. All the costs incurred in operation of his testing shall also be borne by the Contractor. The Contractor shall also appoint a superintendent in charge of testing to work in the laboratory.

The Contractor shall when requested by the Engineer or the Engineers Representative carry out any test in the presence of the Engineer or the Engineers Representative, or shall provide all necessary testing engineers, laboratory assistants and labours required to the Engineer free of charge. The Contractor shall ensure that the Engineer and his staff have unrestricted access to these facilities free of any charge.

1.28.3Sanitation

The Contractor is to arrange for a high standard of sanitation to be maintained throughout the Camp and the Works. He shall construct and maintain at his own cost a system of surface drainage and waste disposal which shall be approved by the Engineer before any work commences. Sanitary conveniences for the use of persons employed in the works shall be provided and maintained by the Contractor in accordance with the appropriate laws and regulations in force in Nepal to the extent and in such a manner and at such places as may be approved by the Engineer, and all persons connected with the works shall be obliged to use them.

1.28.4Medical Arrangements and First Aid Facilities

The Contractor shall make arrangements according to the regulations in force in Nepal for treatment on the site of casualties and sick persons.

The arrangements shall include the minimum provision of a Dispensary with in-patient facilities with a minimum of eight beds, a qualified resident dresser and assistant, and for regular visits by a qualified medical practitioner. The Contractor shall make his own arrangements for treatment of casualties on the Site in such first-aid units as may be thought necessary.

In addition to the provisions of Clause 34 of the Conditions of Particular Application, the Contractor shall manage and operate appropriate ambulances for the transportation of injured or sick employees to hospitals in Nepal or India or other places. This facility shall be available for the Employers, Engineers, Subcontractors and Contractors personnel and workmen. The Contractor shall enter in the appropriate items in the Bill of Quantities a sum to cover the construction of such first-aid units and their management and operation and the removal by ambulance.

Notwithstanding the minimum requirements prescribed above, the Contractor shall be responsible for the adequacy of all the arrangements made.

1.28.5Recreation

The Contractor is to make arrangements for the provision of adequate recreational facilities for the employees living in the Camp and his own and the Engineers staff housing sites. He shall submit to the Engineer for his prior approval, proposals for providing these facilities.

The recreational facilities are to be managed by the Contractor who shall make rules for their use which are to be approved by the Engineer. The facilities provided by the Contractor are to be available to the staff of the Engineer and the Employer and their families. Reasonable charges can be made to such staff for the use of these facilities.

The Contractor shall appoint a competent Welfare Officer whose duties will be to supervise the administration of the Contractors accommodation and recreational facilities. He shall in particular ensure that recreational arrangements are available to all employees.1.28.6Fire Protection

The Contractor shall construct, equip and administer at his cost fire control points in such positions and of such size as will provide an adequate service for the protection against fire of the Camp and all building stores and property on the Site. He shall install and maintain a proper warning system to ensure that fire-fighting equipment can be brought into action without delay.

1.28.7Lighting

The Contractor shall install and maintain at his own cost a system of lighting to provide a reasonable degree of illumination over the area of the Contractors offices and camp. He shall submit details of his scheme for the approval of the Engineer before any work commences.


All costs including Contractor's margin, overhead, taxes, etc, incurred by the Contractor in complying with requirements of this Sub-Clause shall be deemed to be included in the respective lump sum price for the Contractors temporary facilities for Item No. K-4, K-5 and K-6 of the Bill of Quantities.

Payment for Contractors temporary facilities such as offices, quarters, labour camps, water and electricity supply system, laboratory and medical facilities shall be made in the fixed percentage of these works. Eighty per cent (80%) of total lump sum price of these temporary works shall be paid to the Contractor upon completion of these temporary facilities, and the remaining twenty per cent (20%) of the total price will be paid after removal.1.29Contractors Transport

The Contractor shall make his own arrangements for the transport where necessary of his staff and workmen to and from the site of the works at his own expenses. No payment shall be made on this item, and such costs in this item are deemed to be covered in the unit rate.

1.30Construction and Maintenance of Temporary Access Road

The Contractor shall construct and maintain the temporary access roads including temporary access bridges necessary for construction of the Works and transportation of the materials. The access roads to the borrow pits and for constructing the canals and roads shall be constructed by rehabilitating and reinforcing the existing roads, where available. The access roads shall be constructed in such a manner that all of the temporary access road and bridge ensure the traffic of heavy equipment and trucks during the whole construction period. The Contractor shall also pay compensation to the owner(s) if he constructs the temporary access roads on a privately owned land.

Not less than 14 days before he intends to start construction of any part of the temporary access roads, the Contractor shall submit to the Engineer the detailed construction programme, and drawings of:

(a)the temporary access roads including temporary access bridges; and

(b)any other temporary works which he considers necessary for proper execution of the works.

The Contractor shall not start the construction of any temporary access road until the Engineers approval thereto has been obtained. However, such approval shall not relieve the Contractor of any liability or obligation under the Contract.

The Contractor shall construct the temporary access roads and bridges in accordance with the approved drawings and construction programme and shall maintain and repair such roads so as to assure traffic of heavy equipment and trucks throughout the construction period of the works, giving a special attention to watering to the access road(s), unless otherwise specified or directed by the Engineer. On completion of the works such as canal, drain, road, bridge, culvert, etc., he shall remove such access road and bridge from the site as directed by the Engineer.

The public and village roads may also be used as temporary access road. The Contractor shall maintain and repair them to the satisfaction of the authorities concerned.

The Contractor shall facilitate the use of such roads for other contractors of the Project and public in a friendly co-operative manner without maintenance of the roads required by them.

All costs including Contractor's margin, overhead, taxes, etc, incurred by the Contractor in complying with requirements of this sub-clause shall be deemed to be included in the lump sum price construction and maintenance of Temporary Access Road Item No. K-7. The cost incurred for the maintenance of public and village roads used for temporary access roads shall be deemed to be included in the lump sum price of Item no K-8 of the Bill of Quantities. Payment for these items shall be made on pro-rata basis depending upon the total progress accomplished. 1.31Disposal and Care of Ground/Surface Water, Dewatering Foundations and Temporary Diversions

1.31.1General

Disposal of all water encountered during the execution of the Works under the Contract shall be the responsibility of the Contractor. Control of ground water shall be accomplished in a manner that will preserve the bearing quality of the foundation soils, will not cause instability of the excavation slopes, and will not result in damage to existing structures. Where necessary to these purposes, the water level shall be lowered in advance of excavation, utilizing wells, well points or similar methods. The water level as measured in piezometers shall be maintained a minimum of one (1.0) m below the prevailing excavation level, or it shall be lowered to a point no higher than 0.60m above the top of impermeable strata. Open pumping with sumps and ditches, if it results in boils, loss of fines, softening of the ground or instability of slopes, will not be permitted. Sumps, wells and well points shall be installed with suitable screens and filters so that continuous pumping of fines does not occur. The discharge shall be arranged to facilitate collection of samples of water by the engineers. The Contractor shall construct and maintain all necessary cofferdams, channels, flumes, drains and sumps and/or other temporary diversion and protective works. The Contractor shall furnish all materials required and shall furnish, install operate and maintain all necessary pumping and other equipment for removing water from the various parts of the work and for maintaining the foundations. All parts of the Works shall be free from water as required for construction. After having served their purpose, all dikes, coffers and other temporary dewatering facilities shall be removed or levelled so as not to interfere in any way with the operation of the canals and related structures.

The Contractor shall be responsible for and shall repair at his own expense any damage caused by flooding, water, or failure of any part of the dewatering facilities or protective works.

1.31.2Dewatering Foundations

The Contractor shall keep all excavation clear of water during construction. The Contractors method of removal of water from foundation excavation shall be subject to the approval of the Engineer. Where excavation for foundations extends below the water table, the portion below the water table shall be dewatered in advance of excavation. The dewatering shall be accomplished by the manner that will maintain the stability of the excavated slopes and bottom of the excavation, and will enable all construction operations in the dry. The Contractor shall also be required to control seepage along the bottom of the excavation within the extent of the structures which may require supplemental dewatering system or pipe drains leading to sumps from where the water will be pumped out. Review by the Engineer shall not relive the Contractor of responsibility for the adequacy of dewatering system to achieve the specified result.

The Contractor shall have sufficient number of different pumps, i.e., self-priming centrifugal pumps, submersible pumps, and a few complete sets of well points with compatible pumps. Certain large structures may be required to be dewatered by a well point system.

1.31.3Temporary Diversion Works

The Contractor shall have to construct temporary diversion works for construction of Head Works, canals, roads, drains, natural stream and rivers and the related structures such as turnouts, culverts, bridges, etc. Coffer and/or diversion channel shall be constructed in such a manner that the water can be smoothly supplied downstream without overtopping and damaging any part of the coffer and channel.

Not less than 14 days before he intends to commence construction of any part of the temporary diversion works, the Contractor shall submit to the Engineer the detailed construction programme, and drawings of:

(a)coffer including impermeable membrane and diversion channel which he proposes; and

(b)any other temporary works which he considers necessary for the proper execution of the Works.

The Contractor shall not commence any temporary diversion works until the Engineers approval thereto has been obtained. However, the approval shall not relieve the Contractor of any liability or obligation under the Contract.

The Contractor shall construct the temporary diversion works in accordance with the approved drawings and construction programme. The Contractor shall remove all temporary diversion works on completion of the canals, roads and structures.

The cost of all the temporary diversion works, care of water including dewatering and the related temporary works including crops and land compensation related to the diversion works shall be borne by the Contractor.


All costs including Contractor's margin, overhead, taxes, etc, incurred by the Contractor in complying with the requirement of this Sub-Clause shall be deemed to be included in the lump sum price of Dewatering foundations and Temporary diversion works of the Item no G and H of the Bill of Quantities. Payment for these items shall be made on pro-rata basis depending upon the total progress accomplished.

1.32Exploratory Boring and Excavation of Test Pits

The Contractor may from time to time be ordered by the Engineer for execution of exploratory boring and excavation of test pits in the course of the construction work for the purpose to ascertain the engineering properties of the underground foundation. The Contractor shall furnish all necessary equipment, material and labour and shall execute the works in conformity with the direction of the Engineer.

Measurement and payment for exploratory boring and excavation of test pits shall be made in Day Work basis in accordance with Sub-Clause 52.4 of the Conditions of Contract.

1.33Materials and Supplies to be New and Unused

All materials, Plant and other supplies to be incorporated in the Works shall be new, unused, of the most recent or current models, and incorporate all recent improvements in design and materials unless provided otherwise in the contract.

1.34Environmental Protection Works

The Environment is defined to mean surrounding area including human and natural resources to be affected by execution and completion of Works.

The Contractor shall take all precautions for safeguarding the environment during the course of the construction of the Works. He shall abide by all prevailing laws, rules and regulations governing pollution and environmental protection. In particular, the Contractor shall fully comply with the environmental protection mitigation measures specified in the related EIA Guidelines published by the Ministry of Forests and Soil Conservation and the Ministry of Environment, Science and Technology (Latest Publications).

The Contractor shall prohibit employees from unauthorised use of explosives, poaching wildlife and cutting trees. The Contractor shall be responsible for the action of his employees.

Environmental protection works, among others, shall include:

1.34.1Borrow/Quarry SitesThe Engineer shall have the power to disallow the method of construction and/or the use of any borrow/quarry area if in his opinion the stability and safety of the Works or any adjacent structure is endangered, or there is undue interference with the natural or artificial drainage, or the method or use of the area will promote undue erosion.

All areas susceptible to erosion shall be protected as soon as possible either by temporary or permanent drainage works. All necessary measures shall be taken to prevent concentration of surface water and to avoid erosion and scouring of slopes and other areas. Any newly formed channels shall be backfilled.

Borrows/quarries shall be located away from the population centres, drinking water intakes and drainage systems. The cutting of trees shall be minimised. Temporary ditches and/or settling basins shall be dug to prevent erosion. The undesirable ponding of water shall be prevented through temporary drains discharging to natural drainage channels.Earthwork operations shall be strictly limited to the areas to be occupied by the permanent Works and approved borrow areas and quarries unless otherwise permitted by the Engineer. Due provision shall be made for temporary drainage. Erosion and/or instability and/or sediment deposition arising from earthwork operations not in accordance with the Specifications shall be made good immediately.

The Contractor shall obtain the permission of the Engineer before opening up any borrows or quarries. Such borrow pits and quarries may be prohibited or restricted in dimensions and depth by the Engineer where:

(i)they might affect the stability or safety of the Works or adjacent property;

(ii)they might interfere with natural or artificial drainage or irrigation;

(iii)they may be environmentally unsuitable.

At least 14 days before he intends to commence opening up any approved borrow pit or quarry, the Contractor shall submit to the Engineer his intended method of working and restoration. These shall include but not be limited to:

(i)the location; design and method of construction of any access track;

(ii)the volume and nature of materials to be removed;

(iii)the sequence and method of excavation of materials;

(iv)measures for controlling runoff and sediment from the site during operations;

(v)proposals for site restoration including approximate finished levels, drainage, erosion and sediment control, slope stabilisation and re-vegetation, including reinstatement of any access track.

Operation of borrow pit or borrow area shall not be permitted until the method of working for that particular pit or area has been approved by the Engineer in writing. Restoration shall be to the satisfaction of the Engineer.

1.34.2Disposal of Spoil and Construction WasteMaterials in excess of the requirements for permanent works and unsuitable materials shall be disposed off in locations and in the manner as agreed with the Engineer. The locations of disposal sites shall be such as not to promote instability, destruction of properties and water supply systems. Exposed areas of such disposal sites shall be suitably dressed and be planted with suitable vegetation.

The Contractor shall plan his works in such a way that there is no spillage of petroleum products to the surface or sub-surface water.

1.34.3Provision and Maintenance of Camps, Offices, Stores, Equipment Yards

and WorkshopsVarious works defined under this item are related to provision and maintenance of camps for workmen and employees, Contractors site offices, stores equipment yards and workshops, etc. These camps shall be adequate, rainproof, spacious, airy and hygienic with proper lighting and materials storage facilities. The area shall be kept neat and clean.

Space allocated for storage of materials such as cement, gabion wire, reinforcing wire etc. shall in general be damp-free, rainproof and away from petroleum products storage.

Written information must be given to and approval be taken from the Engineer regarding proper establishment and maintenance of such camps. Failure in compliance with Engineers instruction in respect of overall standard will lead to reduction or withholding of payment.1.34.4Crushing PlantsCrushing plants shall be located away from the population centres, water intakes and sensitive echo system establishments. Suitable dust control device shall be fitted to the crusher to control emission of dust from the plant.

1.34.5Hazardous MaterialsThe Contractor shall not store hazardous materials near water surfaces. The Contractor shall provide protective clothing or appliances when it is necessary to use some hazardous substances.

High concentration of airborne dust resulting in deposition and damage to crops and water resources shall be avoided. The Contractor shall take every precaution to control excessive noise resulting in disruption to wildlife and human population.

1.34.6Reinstatement of Environment

The Contractor shall arrange and execute works as well as related activities in such a way that environmental conditions are reinstated. He may be required to carry out filling, removal and disposal works along with planting of grass and trees at his own costs at identified locations to reinstate environment as directed by the Engineer.


No separate payment shall be made for the cost incurred by the Contractor for complying with the stipulations of this Sub-Clause. All costs including Contractor's margin, overhead, taxes, etc, in connection with this Sub-Clause shall be considered to be included in other items of the works included in the Bill of Quantities.

1.34.8Existing Settlements and Burial GroundsThe Contractor shall carry out the Works so that interference with existing settlements shall be kept to a minimum. The Employer will arrange for the evacuation of settlements in the way of the Permanent Works, and the Contractor shall be responsible for the clearance of any debris etc. remaining after the evacuation.

The Contractor shall not to interfere in any way with existing burial grounds, graves, and the like. Where these are in the way of the Permanent Works, the Employer will arrange for the opening up of graves and the removal of human remains.

The Contractor shall give 56 days notice in writing to the Engineer of his intention to carry out any work requiring the evacuation of settlements or the removal of graves etc.

Should it be suspected that human remains are discovered during the course of excavation Works, they shall be left undisturbed and the Contractor shall immediately report the matter to the Engineers Representative and request his instructions.

1.35Insurances

The Contactor shall be paid the lump sum amount for fulfilling his obligations under Clause 21, Clause 23 and Clause 24 of Conditions of Contract as mentioned in the following Sub-Clauses 1.35.1, 1.35.2 and 1.35.3. Payment shall be made in four instalments, one-fourth of the quoted amount for each of the items K-1, K-2 and K-3 in each of the instalments. The first instalment shall be made after furnishing all the documentary evidence of the insurance policy and remaining three instalments to the contractor shall be paid on the annual basis.

1.35.1Insurance of Works

For fulfilling his obligations under Clause 21 of the Conditions of Contract, the Contractor shall be paid the lump sum amount of Item No. K-1 in the Bill of Quantities, which shall be deemed to include all the Contractors costs incidental to providing the specified insurance.

1.35.2Third Party Insurance

For fulfilling his obligations under Clause 23 of Conditions of Contract, the Contractor shall be paid the lump sum amount of Item No. K-2 in the Bill of Quantities which amount shall be deemed to include all the Contractors cost incidental to providing the specified insurance.

1.35.3Insurance Against Accident to Workmen

For fulfilling his obligations under Clause 24 of the Conditions of Contract, the Contractor will be paid the lump sum amount of Item No. K-3 in the Bill of Quantities which amount shall be deemed to include all the Contractors cost incidental to providing the specified insurance.

1.36Traffic

1.36.1Traffic Safety and Control

The Contractor shall provide, erect and maintain such barricades, including signs, markings, flags, lights and flagmen as may be required for the information and protection of traffic approaching to or passing through the section of the road under improvement and/or diversions. Barricades, traffic signs and warning boards shall be provided as per the Traffic Signs Manual (Latest Publication) published by the Traffic Engineering and Safety Unit of the Design Branch of the Department of Roads.

The barricades erected on either side of the carriageway/portion of the carriageway close to movement of traffic, shall be of strong design to resist violation, and be painted as per the said Traffic Sign Manual. On both sides, suitable regulatory and/or warning signs shall be installed for the guidance of the road users. On each approach, at least two signs shall be put. The location of these signs shall be in accordance with the Code of Practice published by the Traffic Engineering and Safety Unit of the Design Branch of the Department of Roads.

In some locations steel drums may also be placed. These drums shall be white-washed, blasted with sand and provided with retro retro-reflective tape strips, red on the left hand side facing on coming traffic and white on the right hand side as appropriate. The minimum size of these tapes shall be 0.01 sq.m. The drums shall be maintained in a clean and effective condition and no stones or any other warning device shall be placed on top of the drums.1.36.2Measurement and Payment

Unless otherwise provided in the contract, no separate measurement and/or payment shall be made for all materials and works required under this Clause. All costs including Contractor's margin, overhead, taxes, etc, in connection with the work specified herein shall be considered to be included with other related items of the work in the Bill of Quantities.

1.37Temporary Diversions for Traffic

1.37.1Provisions of Diversions

Where some portions of the existing road cannot be used by through traffic, diversions as may be required to deviate traffic from such portions shall be constructed.

1.37.2Survey beacons and Monuments

Diversions shall be constructed so as not to damage or displace trigonometrical survey beacons and road monuments. In exceptional cases where this is not possible, arrangements shall be made to have survey beacons suitably referenced before they are displaced and relocated after the completion of the work.

1.37.3Access to Properties

Access to properties which work is being carried out shall be provided in the manner as existed before the start of the work.

1.37.4Temporary Works

If diversions are provided they shall include the construction of temporary gates, grid gates, fences, drainage works, and other incidentals considered necessary.

1.37.5Public Services

Arrangements shall be made for the continuity of all public services such as power lines, telephone lines, water mains, sewerage, drainage, etc., if the existing services are likely to be affected.

1.37.6Width of Diversions

The usable width for accommodation of two-way traffic shall not be less than 6 m. Where diversions consist of two separate one-way lane the minimum usable width of each lane shall not be less than 3.5 m.

1.37.7Temporary Drainage Works

All necessary temporary drainage works required for proper surface run-off, such as side drains, catch water drains, temporary cross-drainage structures, etc. shall be constructed.

1.37.8Earthworks for Diversion

Diversions shall be shaped and graded making full use of all material that can be obtained from side cut or from the immediate vicinity within the road reserve. If sufficient material cannot be obtained in this manner, material shall be imported from other sources. Where the sub-grade is not sufficiently compacted in its natural condition, it shall be compacted as specified in CHAPTER 3 prior to the commencement of the earthworks.

All fill material shall be compacted to a density of at least 90% of maximum dry density (Heavy Compaction).

1.37.9Maintenance of Diversions

All diversions shall be maintained in a safe and smooth trafficable condition. Whenever required the diversions shall be bladed by means of graders to provide a smooth riding surface free of corrugations. All potholes shall be promptly repaired. Diversion shall be watered to keep down dust from traffic and in order to facilitate the proper blading of the surface. All drainage works shall be maintained in good working order and kept unblocked.

1.37.10Removal of Diversions

When traffic is routed permanently onto the new road following the completion of construction, the diversions which are no longer required shall be removed and the ground reinstated to its original condition.

1.37.11Measurement and payment

Unless otherwise provided in the contract, no separate measurement and/or payment shall be made for all materials and works required under this Clause. All including Contractor's margin, overhead, taxes, etc, costs in connection with the work specified herein shall be considered to be included with other related items of the work in the Bill of Quantities.1.38Maintenance of Road

The Contractor shall be responsible for undertaking all routine maintenance of the existing road and all bridges on the road from the day the road is officially handed-over to the Contractor until the issue of Defects Liability Certificate by the Engineer. The Contractor shall also carry out all routine maintenance of the completed works from the time of their substantial completion until the Defects Liability Certificate is issued.

The Contractor shall also maintain roads that he uses for construction or access and the use of such roads shall be identified in advance to the Engineer for inspection prior to use.

The routine maintenance of the road shall include besides other, trimming vegetation, cleaning all culverts, ditches, borrow pits, road side drainage, drainage channels and any other obstructions cleaning road signs and checking and undertaking the repair of guardrails and other road safety structures cleaning including removal of obstructions on bridge decks and bridge deck drainage elements, checking and cleaning of expansion joints and bearings, cleaning bearing shelves and weep holes, removing accumulated debris and vegetation around and between piers and abutments, repairing parapets, clearance on the road to allow free flow of traffic and reinstatement of any damaged or deteriorated carriageway, and protection of adjoining works. In case of road Section where the surface is in badly damaged condition, the maintenance of existing road surface shall be maintained by potholes patching using gravel, re-profiling and re-grading as instructed by Engineer. The surface shall be maintained to ensure longitudinal and transverse profile. All the damages to the road carriageway and shoulder shall be repaired with the material of equal or higher standard than the original surfacing.

The Contractor shall perform the maintenance works as often as required to keep the carriageway, shoulders, and adjoining structures in proper working order to the satisfaction of the Engineer.

During the period of commencement of works the Contractor shall mobilize labour and equipment to make an immediate start on the maintenance of the existing road. The location a

Date post:	07-Mar-2016
Category:	Documents
Upload:	subin-gajurel
View:	214 times
Download:	0 times