tender document for the design and build ...5. road design manual, part iv; “bridge design”,...

Thika Road BRT Section VIII: Employer’s Requirements

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REPUBLIC OF KENYA NaMATA

STATE DEARPTMENT OF HOUSING & URBAN DEVELOPMENT (SDoH&UD)

NAIROBI METROPOLITAN AREA TRANSPORT AUTHORITY (NaMATA)

TENDER DOCUMENT

FOR

THE DESIGN AND BUILD PROJECT FOR THE BUS RAPID TRANSPORT

(BRT)

FACILITIES ON THIKA SUPERHIGHWAY CORRIDOR (CLAYWORKS-RUIRU-NAIROBI CBD- KENYATTA NATIONAL HOSPITAL

SECTION)

(FIDIC EPC /TURNKEY BASED)

TENDER No. MoTIH&UD/HUD/NaMATA/WKS-01/2019-2020

VOLUME II:- EMPLOYER’S REQUIREMENTS:

NOVEMBER , 2019

The Director,

Projects and Programmes

Nairobi Metropolitan Area Transport Authority

P.O. BOX 30117-00100

NAIROBI

Ag. Director General

Nairobi Metropolitan Area Transport

Authority

P.O. BOX 30117-00100

NAIROBI


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Section VIII

EMPLOYER’S REQUIREMENTS

This Employer’s requirements specifies the particular requirements for the completed Works

on a functional basis, including detailed requirements on quality and scope, and details on

what the Contractor shall supply as consumables or otherwise.

In the preparation of these Employer’s requirements, the following Documents and Manuals

are part of the sources of reference:-

1. Conditions of Contracts for EPC/Turnkey Projects FIDIC, 1999 and the Sub-clauses

therein

2. Standard Specifications for Road and Bridge Construction, 1986 and their Corresponding

Sub Clauses.

3. Road Design Manual, Part I; “Geometric Design of Rural Roads”, January 1979

4. Road Design Manual, Part III; “Materials and Pavement Design for New Roads”, August

1987

5. Road Design Manual, Part IV; “Bridge Design”, August 1993

6. Proposed Manual for Traffic Signs in Kenya,

a. Part I, “Road Markings” and,

b. Part II, Manual for Traffic Signs in Kenya, June1975

7. Standard Specifications for Road and Bridge Construction, 1986

8. NaMATA BRT Design Framework (Feb 2018) or as instructed by NaMATA

8.


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TABLE OF CONTENTS

1 INTRODUCTION .................................................................................................................................. 1

2 WORKS DESCRIPTION ...................................................................................................................... 2

3 SCOPE OF THE REQUIRED WORKS- CLAUSE 4.1 ........................................................................ 3

3.3. PROGRAMME AND PROJECT PHASES ...................................................................................... 1

3.4. PRE-TENDER SITE VISIT .............................................................................................................. 2

3.5. PROJECT PERFORMANCE SPECIFICATIONS .......................................................................... 2

4 APPLICABLE TECHNICAL STANDARDS AND GUIDELINES ...................................................... 5

5 DOCUMENTS REVIEW PROCESS .................................................................................................... 7

6 CONTRACTUAL REQUIREMENTS .................................................................................................. 9

6.1 TECHNICAL PARAMETERS ......................................................................................................... 9

6.1.1 Topographic survey and Construction staking ............................................................................... 9

6.1.2 Road Geometry Requirements ......................................................................................................... 1

6.1.3 Pavement Design and Materials Investigations .............................................................................. 4

6.1.4 Traffic Requirements: ...................................................................................................................... 5

6.1.5 Hydrology/Hydraulics ...................................................................................................................... 5

6.1.6 Drainage ........................................................................................................................................... 6

6.1.7 Culverts ............................................................................................................................................ 7

6.1.8 Bridge Structure ............................................................................................................................... 7

6.1.9 Retaining walls ................................................................................................................................. 9

6.1.10 Traffic Marking ........................................................................................................................... 9

6.1.11 Road Signing ............................................................................................................................... 9

6.1.12 Road Safety Measures Requirements ....................................................................................... 10

6.1.13 Environmental and Social Impact Assessment (ESIA) Requirements .................................... 11

6.1.14 Design Base Statement Requirements ...................................................................................... 11

6.1.15 Safety Audit Requirements ........................................................................................................ 11

6.1.16 Technical and Safety Audit Requirements ............................................................................... 11

6.1.17 Permits and Licenses Requirements ......................................................................................... 11

6.1.18 Details of Employer’s Personnel ............................................................................................... 12

6.1.19 Contractor’s Personnel Qualifications ..................................................................................... 12

6.1.20 Nominated Sub-Contractors ...................................................................................................... 12

6.1.21 Facilities for Employer’s Personnel ......................................................................................... 12

6.1.22 Provisional Sums ....................................................................................................................... 12

268,000,000 ................................................................................................................................................... 12

6.1.23 Dayworks ................................................................................................................................... 12

6.1.24 Schedule of Payments ................................................................................................................ 12

6.1.25 Project specific Information ...................................................................................................... 12

6.2 PRELIMINARY DESIGN ............................................................................................................... 13

6.3 DETAILED DESIGN ...................................................................................................................... 17

DESIGN DRAWINGS ........................................................................................................................................... 18

6.4 CONSTRUCTION ............................................................................................................................. 1


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6.5 TEST ON/AFTER COMPLETION .................................................................................................. 1

6.5.1 Test on Completion .......................................................................................................................... 1

6.5.2 As Built Documents and As Built Drawings ................................................................................... 1

6.5.3 As-built Drawing .............................................................................................................................. 1

6.5.4 Geotechnical Report......................................................................................................................... 2

6.5.5 Road Maintenance Manual ............................................................................................................. 3

6.5.6 Structures Maintenance Manual ..................................................................................................... 4

6.5.7 Electrical Installations Maintenance Manual ................................................................................ 6

6.5.8 Lighting Installations Manual......................................................................................................... 6

6.5.9 Test after Completion ....................................................................................................................... 6

7 CONTRACTOR’S REPORTING OBLIGATIONS ............................................................................. 7

7.1 PROGRESS MONITORING ............................................................................................................ 7

7.2 CONTENTS OF MONTHLY PROGRESS REPORTS.................................................................... 8

7.3 CONTENTS OF PROGRESS NARRATIVE REPORT ................................................................... 8

7.4 CONTENTS OF QUALITY CERTIFICATIONS REPORT ........................................................... 8

7.5 CONTENTS OF ORDER ON CONTRACT STATUS REPORT .................................................... 9

7.6 TECHNICAL REPORTS .................................................................................................................. 9

8 QUALITY ASSURANCE .................................................................................................................... 12

8.1 REQUIREMENTS ........................................................................................................................... 12

8.2 QUALITY PLANS ........................................................................................................................... 12

8.3 DESIGN QUALITY PLAN (STAGE 1) .......................................................................................... 12

8.4 CONSTRUCTION QUALITY PLAN (STAGE 1) .......................................................................... 13

8.5 QUALITY AUDITS ......................................................................................................................... 13


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Employer’s Requirements

Statement of Requirements for:

THE DESIGN AND BUILD PROJECT FOR THE BUS RAPID TRANSPORT (BRT)

FACILITIES ON THIKA SUPERHIGHWAY CORRIDOR.

PHASE I: CLAYWORKS -NAIROBI CBD SECTION

PHASE II: – CLAYWORKS RUIRU - NAIROBI CBD - KENYATTA NATIONAL

HOSPITAL SECTIONS

1 INTRODUCTION

The Government of Kenya intends to improve the infrastructure on Thika Superhighway

to accommodate a Bus Rapid Transport (BRT) system for the section between Ruiru

Nairobi CBD and Kenyatta National Hospital. This project will be undertaken in two

phases:

Phase I: Clayworks – Nairobi CBD Section and

Phase II: Clayworks-Ruiru–Nairobi CBD–Kenyatta National Hospital (KNH)

Sections,

As a Design & Build Contract (FIDIC EPC/TURNEY: fixed price) with a construction

period of 18 months.

The Works will include all field Works, detailed engineering design and upgrading of the

existing superhighway by introduction of BRT lanes and accompanying facilities in the

innermost lanes of the existing carriageway and as detailed below.

Broadly the Contractor shall:-

(a) Undertake topographical and cadastral surveys, preparation of Resettlement

Action Plan, Valuation of properties for compensation (If any) along the

proposed Corridor, and obtain the necessary approvals and gazettement from

the Lands Commission.

(b) Conduct an Environmental and Social Impact Assessment (ESIA) study

detailing the positive and negative effects on the environment with suggested

mitigation measures and seek approval from NEMA.

(c) Undertake traffic impact studies and modelling.

(d) Undertake a feasibility study on the alignment options and prepare a detailed

engineering design for the selected alignment alternative for the proposed

Corridor.

(e) Undertake construction of the approved design of BRT infrastructure and road

Works and prepare as built drawings.

(f) Seek for review, comment and approval of (a) to (e) above, by the Employer as

the Works proceed.


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2 WORKS DESCRIPTION

2.1. Project Location

The project is located along the existing Thika Superhighway (A2S & A2S R) Corridor from

Ruiru, Membley Junction, Clayworks, Kenyatta University, Githurai, Kasarani, Pangani

Underpass, Murang’a Road, Globe Cinema Overpass, Tom Mboya Street, Moi Avenue, Haile

Selassie Avenue to Kenyatta National Hospital and Back .

Phase I; Clayworks, Kenyatta University, Githurai, Kasarani, Pangani Underpass, Murang’a

Road, Globe Cinema Overpass, Tom Mboya Street, Moi Avenue Approximately 20 Km long.

Phase II: Ruiru, Membley Junction, Clayworks section approximately 3km and Moi Avenue,

Haile Selassie Avenue to Kenyatta National Hospital approximately 4km.

2.2. Existing Route Condition.

Thika Superhighway (Class S) road is currently a bituminous road comprising of, on average,

6 lanes on the main carriageway and 4 lanes on the service road and is generally in good

condition. The Section in the CBD has two lanes most of the way and is in fair condition

which may require immediate strengthening.

2.2.1. Previous Designs

The as built drawings for the Thika Superhighway are available for information purposes

only to enable the bidders prepare the Works designs. Information on the rest of the Corridor

may be obtained on request from Kenya National Highways Authority.

2.2.2. Land use

Land use is characterised by a combination of commercial and residential activities with

several commercial/ residential structures abutting the road reserve. There are several existing

utility lines along the road reserve which may need to be relocated by the Contractor.

2.3. Purpose for the Works

The purpose of the Works is to provide a safe, efficient, effective and environmental friendly

BRT system to facilitate the decongestion of the Nairobi CBD with smooth integration with

the existing transport infrastructure with minimal need for maintenance.


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SCOPE OF THE REQUIRED WORKS- Clause 4.1

3.1. General

The summary of the scope of Works to be carried out is as follows;

i. Carry out a detailed traffic impact study and modelling.

ii. Detailed Engineering design for;

a. Modification of Ten (10No.) existing footbridges to serve as access to BRT

picking points and stations as listed below;

i. Kenyatta University

ii. Kahawa Barracks

iii. Githurai (Car wash)

iv. Kasarani/Roysambu

v. Safari Park

vi. Garden City (under construction)

vii. Kenya School of Monetary Studies (under construction)

viii. Utalii/National Youth Service

ix. Muthaiga

x. Ngara

b. BRT picking booths in the median

c. Channelization of both motorized and non-motorized traffic to accommodate

the BRT infrastructure.

d. Three (3) No. elevated U-turn ramps as interchange for feeder Buses and

Matatus

e. Three (3) No. Park and ride Facilities

f. Physical separation of the BRT lanes from general traffic

g. Three (3) No. New footbridges at Ruiru, Membley and Githurai

h. Transfer stations at Ruiru, Githurai and Kasarani.

iii. Detailed Engineering designs for the smooth flow of traffic at the junctions and

accesses.

iv. Construction of the BRT infrastructure and the engineered road facilities as per the

approved Detailed Engineering Designs.

v. Provision and maintenance of offices, laboratory and accommodation for the

Employer’s Representative and /or his staff.

vi. Maintenance of the existing road during construction period.

vii. Management and control of traffic during construction period

viii. Provision and erection of road furniture and road markings and other miscellaneous

Works

ix. Any other Works as may be instructed by the Employer’s Representative or as agreed

between the Contractor and the Employer.


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3.2. The Project Works

The project Works are located along the existing Thika Superhighway (A2S & A2S R)

Corridor from Ruiru through Membley Junction, Kenyatta University, Githurai, Kasarani,

Pangani Underpass, Murang’a Road, Globe Cinema Overpass, Tom Mboya Street, Moi

Avenue, Haile Selassie Avenue to Kenyatta National Hospital and Back through

Community-Kenyatta Avenue, Tom Mboya Street, Koja Mosque Roundabout and

Murang’a Road. Approximately 20 Km long.

Thika Superhighway (Class S) road is currently a bituminous road comprising of, on

average, 6 lanes on the main carriageway and 4 lanes on the service road and is generally

in good condition. The Section in the CBD has two lanes most of the way and is in fair

condition which may require immediate strengthening.

a) The Road Reserve and Land Acquisition

The park and ride facilities for Ruiru, Githurai and Kasarani will be constructed off the

existing road reserve at the locations to be shown by the Employer.

The Contractor shall ensure that the Works design fit well within the availed land and

road reserve as the Employer shall not undertake additional land acquisition in order to

accommodate the detailed design.

b) Treatment of existing services and utility lines

The Contractor shall incorporate in the detailed design, the existing services and utility

lines to avoid relocation of the same.

The Contractor shall incorporate in his Contract Price, the unavoidable costs of

protecting, relocating and/or accommodating the existing services and utility lines in the

detailed design.

3.3. Programme and Project Phases The Contractor shall provide a time Programme as required under Clause 8.3 of the

Conditions of Contract.

The Contractor shall allow in his programme for construction of trial sections and

carrying out tests upon them as directed by the Employer’s Representative in accordance

with the provisions of Clause 129 of the Standard Specification for Road and Bridge

Construction, 1986. The Time for Completion of the Contract shall not be extended

because of the time taken to carry out tests and evaluate trial sections.

The Contractor shall be required to carry out Works in three distinctive phases as follows:

(i) Feasibility Study and Preliminary Design;

(ii) Detailed Engineering Design; and

(iii) Construction.

Construction of permanent Works shall not proceed until the detailed engineering design

of the said work has been approved by the Employer.

Unless instructed otherwise by the Employer’s Representative, the Contractor shall

commence Works at ClayworksRuiru and proceed progressively to the CBD along Tom

Mboya Street then to Ruiru and Kenyatta National Hospital.


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3.4. Pre-tender Site Visit Bidders must conduct a site visit and should, in their technical proposal, identify areas

where they consider that additional Works/ services may be required. The bidders should

also indicate where there are opportunities for potential cost savings.

3.5. Project Performance Specifications

i). Time for Completion

The entire project should be implemented within the time frame stated in the Appendix to

form of Tender. If no duration is indicated in the said section, 18 months Construction

and one (1) years Defect Notification Period shall apply.

ii). Quality/Condition at Delivery (Project Completion)

At the end of the Defect Notification Period, the Contractor shall undertake Tests after

Completion to demonstrate the performance specifications for pavement structure and

Bridges, footbridges and drainage structure specified below.

In the event of any conflict between this performance specification and other sections of

the Employer’s Requirements, this performance specification shall prevail.

Pavement Structure

The following matrix presents the required pavement performance specifications for the

entire road project at the end of 1 year Defect Notification Period after handover by the

Contractor to NaMATA

The matrix sets out key performance indicators for surface deflection (limits will be set

on finalization and approval of design), riding quality, rutting and cracking. The limits

include a condition expected not to be exceeded on the major part of the project

(percentages of major portion indicated), and a supplementary condition related to limit

on out-of-range values. The Contractor is to remedy at his cost any test parameters that

fail to meet the required performance criteria set in the table below

It will be noted that causes of cracking, if occurring in this period, must be identified and

agreed. Suitable repairs shall then be undertaken as approved to remedy any underlying

defects.

Parame

ter Units

Major part of

project Supplemen

tary

condition

Limit on out-of-

range

Test

Method

Test

Frequenc

y At least Limit Less than

Limi

t

Maximu

m

surface

deflecti

on

mm 95% < 0.35 AND 2% > 0.4

Rebound

deflection,

8,200 Kg

axle load,

near side

wheel path

Every

50m, each

lane

Roughn

ess m/km

(mm/

m) 80% < 4 AND 2% > 5

IRI

roughness

with

calibrated

vehicle

Continuou

s in each

lane

Rutting

mm 90% < 2 AND 2% > 5

Near side

wheel path

Every

50m, each

lane

Crackin

g

There shall be no visible cracks. Any cracks appearing during this monitoring

period must be immediately sealed, and reason(s) for cracking identified and

suitable repairs undertaken to the Client's approval


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Bridges, Footbridges and Drainage Structures

This section describes the performance specifications for the bridges, foot bridges and the

drainage structures at the end of the Defect Notification Period.

Design Life

The bridges, footbridges and drainage structures design life shall be 100 years.

Minimum cover for reinforcements shall be as specified in the

The design of the structures shall be as defined in BS or its equivalent

Cracks

Cracks in concrete shall not exceed the limits specified in BS 5400 part 4.

Vertical Clearances

The vertical clearances for bridges, footbridges and underpasses shall be minimum 6m above

the road riding surface.

Sleeves

The Contractor shall provide for safe crossing of other service lines including fibre,

underground cables, power lines, pipelines etc within the bridges, footbridges and other

drainage structures

Beams

Simply/continuously supported beams maximum deflections under design loading shall be

L/500 where ‘L’ is the effective length of the span in millimetres as defined in BS 5400 part

4.

Abutments

The maximum allowable deflection of Cantilever members under design loading shall be

L/200 where ‘L’ is the effective length in millimetres as defined in BS 5400 part 4.

For restrained abutments, movement of the restraining tendon shall not be more than 25mm.

Connections

Connection for structural steel members shall be of the same quality and strength as the

mother members preferably by butt welding with cathodes that are of the same quality

material as the mother member.

Connections for non-structural members shall be as per the standard specifications

Where bolts are used, they shall have the same design life as the overall structure under the

prevailing weather conditions.

Bearings

The bearings shall have a guarantee of 100 years with minimal maintenance cost.

The bearing shall be able to accommodate the maximum rotation, maximum direct loading

and any shear deflections.

Barriers

Crush barriers shall be able to resist minimum impact loading specified in BS 5400 part 2:

Specifications for Loads.

Safety barriers shall not be prone to vandalism. Non-motorised safety barriers shall restrain

sliding off and discourage jumping over the facility.

Expansion Joints

Expansion joints shall allow for movements without inducing lateral forces in the members.

The expansion joints shall allow for self-cleansing.


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The expansion joints shall be properly fixed to last the bridge design life of 100years.

The expansion joints shall have a guarantee of 100years with minimal maintenance cost.

Non-motorised traffic Facilities

The non-motorised traffic facilities shall be comfortable, safe, adequate and aesthetically

appealing at proper locations suitable for use by normal, elderly, disabled and the children.

The walking surface shall be of adequate traction to avoid sliding.

BRT Facilities

To meet requirements specified in NaMATA BRT Design Framework (Feb 2018) or as

instructed by NaMATA and other relevant standards.


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3 APPLICABLE TECHNICAL STANDARDS AND GUIDELINES

The design, documentation and construction shall be undertaken in accordance with the

latest standards and design guidance issued by the Ministry responsible for Roads in

Kenya as listed below:

Road Design Manual, Part I; “Geometric Design of Rural Roads”, January 1979

Road Design Manual, Part III; “Materials and Pavement Design for New Roads”,

August 1987

Road Design Manual, Part IV; “Bridge Design”, August 1993

Proposed Manual for Traffic Signs in Kenya,

o Part I, “Road Markings” and,

o Part II, Manual for Traffic Signs in Kenya, June1975

Standard Specifications for Road and Bridge Construction, 1986

NaMATA BRT Design Framework (Feb 2018)

Other internationally accepted standards such as listed below shall be used on approval of

the Employer:

American Association of State Highway and Transportation Officials (AASHTO)

British Standards (BS)

Eurocode

Road Note 40

Road Safety Audits

Adolf Putcher Charts

Standard Culverts and Drifts Manual, 1982

Standard Drainage Structures Manual Part I

Traffic surveys shall generally be carried out following the guidelines and

recommendations of the TRL Overseas Road Note 40: A guide to axle load surveys and

traffic counts for determining traffic loading on pavements, TRL Ltd, Crowthorne,

Berkshire, UK 2004. The applicable Vehicle classification shall be as follows;

i. Motorcycles: motorcycles with or without side-cars e.g. motor tricycles

ii. Saloon car: <= 5 seats

iii. Large car 4WD: <= 9 seats

iv. Minibus/Matatu: <= 23 passengers

v. Pick-up/Van/LGV: <1.5t unladen

vi. Light truck: 2 axles (single rear wheels) 3-6t payload

vii. Medium truck/MGV: 2 axles (double rear wheels) 7-10t payload

viii. Heavy truck/HGV: 3-4 axles rigid

ix. Articulated trucks: >= 5 axles

x. Small bus: 24-40 passengers


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xi. Large bus: > 40 passengers

xii. BRT buses > 70 passengers (standard), 140 passengers

(articulated), 210 passengers (bi-articulated)

xiii. NMT: Bicycle, cart and pedestrian

The Environmental and Social Impact Assessment (ESIA) study will be in accordance with

the Environmental Management and Co-ordination Act (EMCA), 1999 and the

Environmental (Impact Assessment and Audit) Regulations, 2002.

The safety audit shall be carried out in accordance with the Road Safety Audit

Manual/guidelines of the Government of Kenya and any other internationally accepted

standards and as agreed with the Employer.

All the design and construction work undertaken by the Contractor in respect of the Contract

shall comply with these procedures and requirements.


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4 DOCUMENTS REVIEW PROCESS

Whenever a Contractor’s document is due for review, clause 5.2 of the general conditions

of Contract together with any amendments in the Particular conditions shall apply. The

documents review period shall be 21 days.

In addition to the above;

1. If NaMATA fails to inform the Contractor of the approval or of the amendments

required to any part of the document submitted for review, by the end of twenty-one

(21) days of its submission (by hand) to NaMATA, the Contractor shall give

NaMATA notice that the document will be deemed to be approved, should no

comments be received within five (5) working days from the date of delivery by hand

of the said notice to NaMATA.

2. If NaMATA refers any part of the document submitted for review back to the

Contractor for amendments, the approval procedure as set out herein shall apply to the

amended document. Approval of any document shall not relieve the Contractor of its

liabilities and obligations under the Contract

3. For the feasibility study, preliminary design and detailed design Contractor’s

documents, the Contractor shall provide for a presentations meeting with NaMATA to

review the documents.

And the Contractor shall include the cost of the presentations meeting in his Contract

Price.

The documents shall be submitted to NaMATA at least 14 days prior to the

presentation meeting.

4. For design drawings, the reviewed and approved drawings shall be stamped approved

and signed by NaMATA.

5. Reports and drawings printed shall be suitably bound in book format.

6. Covers, titles, paper sizes and fonts of documents shall be as agreed upon between

NaMATA and the Contractor.

7. The number of copies required in the table below may be varied as agreed to on a

case-by-case basis by the Employer.


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The following shall constitute Contractor’s documents;

Contractor’s Documents (Refer to Clause 5.2 of the GC and COPA)

Item Document Description No. of Hard

Copies

No. of Soft copies

in CD Rom

Requirements

1. Preliminary Design Report 10 2 For Review by

NaMATA

2. Detailed Design Report 10 2 For Review by

NaMATA

3. Materials Report 10 2 For Review by

NaMATA

4. ESIA Report 10 2 For Review by

NaMATA/to satisfy

regulatory requirement

5. Design Drawing 10 2 For Review by

NaMATA

6. Monthly and Quarterly

progress Report

5 2 For Review by

NaMATA

7. As Built drawings 3 2 For review by NaMATA

8. Final Construction &

Maintenance Report,

including Maintenance

Manuals

3 2


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5 CONTRACTUAL REQUIREMENTS

The requirements stipulated herein are to be used in addition to sound engineering

knowledge and good industry practice. A requirement must not be understood as an

"instruction" to the Contractor, who must at all times use his discretion and engineering

expertise to critically evaluate the requirement and, if he decides to deviate from or not

to abide by such requirement, the Contractor must provide motivation or

recommendations to NaMATA substantiating the reason for the required deviation. All

deviations will be subject to approval by NaMATA or its nominated representative. The

approved deviation shall not subject the Authority to additional cost not included in

the Contract price.

5.1 Technical Parameters The major technical parameters shall include;

5.1.1 Topographic survey and Construction staking

The land surveying shall include horizontal and vertical control surveys, topographic

surveys, right-of-way surveys, construction surveys, and all other land surveying services

necessary to complete the project in an accurate, neat and timely fashion.

Performance Requirement: Project survey manager to be in-charge of all survey

activities associated with the project and shall be responsible for directing and reviewing

all survey work and be the point of contact for all survey activities.

Design Survey Work

The Contractor shall carry out detailed ground survey along the length of the proposed

project road using the most up-to-date surveying equipment such as total station, GPS, to

examine the road alignment and cross section and any bridge sites and culvert sites that

are considered necessary to complete the detailed design and the estimation of quantities.

The centre lines shall then be set out, levelled, cross sectioned and benchmarks

established. The coordinates of all intersection points shall be tied to the National Survey

Grid, and levels related to the National Benchmarks.

The Contractor shall establish a paired (coupled) inter-visible GPS control points at least

5.0Km apart from each other. The location of these Control Points shall be determined by

reviewing existing topographic maps and site conditions of the project route.

a) The monument for each Control Point shall be die-stamped in the field; the Contractor

shall provide a standard canopy drawing to the Engineer for approval before the

establishment of the control points.

b) The Design-Builder shall maintain an accuracy level of 10mm+5pmm for the (x, y)

coordinates of all the control points.

The vertical control points shall be referenced in the field on permanent concrete posts

with an interval of 300m and shall be shown on the plan and profile drawings apart from

list of benchmarks to be provided on a separate sheet accompanied by a photo of each

benchmark.

Differential level methods shall be used to establish elevations for the vertical Control

Points. The closing error of a levelled circuit shall not exceed ±√K cm in height

difference between the forward and reverse levelling of successive permanent survey

stations. K is a distance in Km between two consecutive bench marks.


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All topographical surveys undertaken by the Contractor shall be to acceptable

international standards for such Works, and after approval by the Engineer, shall be

recorded in standard or electronic survey field books, which shall become the property of

the Employer upon the completion of the project.

The Contractor shall provide all survey data to the Engineer for review. Any discrepancy

found in the data provided shall be corrected by the Contractor. The Contractor shall be

responsible for this additional field survey work.

Construction Surveying

The Contractor shall be responsible for all survey necessary to complete the work. All

survey control data, calculations, surveying and measuring required for setting and

maintaining the necessary lines and grades shall be the Contractor’s responsibility.

Detailed survey records shall be maintained, including a description of the work

performed on each shift, the methods utilized and control points used. The record shall be

adequate to allow the survey to be reproduced. This record shall include graphic notes

depicting control points used and relationship to other control points or reference points,

description, coordinates and location description. Bench marks and Temporary bench

marks shall also have graphic notes depicting description, elevation, coordinates and

location description. The Survey Manager shall provide a copy of each day’s record to the

Engineer when requested within three calendar days after the end of the shift.

Construction Stakes, Lines and Grades

1) The Contractor shall:-perform the construction engineering, necessary calculations,

staking work, including:

Establishment of survey point and centerlines

Reference control points, when necessary

Set stakes for construction limits, right-of-way, drainage items, slopes, pavement

structure, embankment and subgrade controls, bridge control points for vertical and

horizontal alignment of all components, and any other stakes necessary to control lines

and grades

2) Furnish all stakes, templates, straightedges, and other devices necessary to check,

mark, and maintain points, lines and grades

3) Run level circuits to verify benchmarks the full length of the road construction project.

On bridges, establish four benchmarks, two on each side of each structure unless physical

conditions prohibit placement.

4) Maintain orderly and clear field notes in standard field notebook consistent with

standard engineering practice

Use standard field books consistent with those customarily used by the

construction industry

Allow the Engineer to inspect these field books at any time

The books become the Employer’s property once work is completed

5) Correct any errors at the Contractor’s own cost

6) Assume responsibility for all final accuracy of construction


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Tolerance for detailed survey points

Tolerance for Detailed Survey Points

Feature Tolerance (m) Tolerance of any Point to Straight Line

Fit Between Points X, Y and Z (m) X and Y Z

Structures, Buildings

and Paved Roads etc.

± 0.050 ±0.025 ±0.050

Gravel Pavements ±0.100 ±0.050 ±0.100

All Other Areas ±0.200 ±0.150 ±0.200

Survey Records

Survey records shall be delivered in hardcopy format and also in electronic file format.

The electronic format shall be in ASCII, DWG or DXF format. They shall be delivered at

the time of substantial completion unless requested by the Engineer at an earlier time.

As-Built Records The Contractor shall produce reports documenting the location of the as-built alignments,

profiles, drainage structure locations, and survey control monuments placements. These

reports shall include descriptive statements for survey methods used to determine the as-

built location of the features being surveyed. The Contractor’s as-built data shall include

the coordinate types (x, y and/or z) and feature codes in the format acceptable to the

Employer.

5.1.2 Road Geometry Requirements

The Contractor shall design all roadway geometrics including horizontal alignment,

vertical alignment, cross section elements and super elevation in accordance with the

design criteria.

The Contractor shall provide the engineering services required to furnish the work

products identified in the Contract. The service includes the tasks of data preparation,

data interpretation, and design of construction documents

Performances requirements

The design and construction documents shall be prepared by (or under the direction of) a

professional highways engineer.

Design Criteria

The Contractor shall design and construct the Works to meet the following requirements:

i. Class of Highway: Class A2S/A2S R

ii. Maximum Highway Design Speed: 120 Km/hr

iii. Min. Radius of Hor. Curve: 600m (Design speed 100km/h),100m(Design

Speed in town 50km/h)

iv. Carriage way normal camber: 2.5%, shoulder fall: 4%. Maximum super-

elevation: 6%. For super-elevated sections, the shoulder fall shall be the same as

the super-elevation.

v. The Contractor shall coordinate and ensure that the project design

accommodates and allows for the design of technically and environmentally sound

project.

vi. BRT System:-

o station saturation shall be < 40%

o facilities shall be in accordance with the NaMATA BRT design

framework (2018) or as instructed by NaMATA


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o One way Lane per direction

o Median station

o Passing lane at station

o To prepare the detailed plan and design for the following amenities:-

Passenger information displays, Public address systems

Toilets, drinking water, rest and waiting areas and protection

from weather;

Facilities for physically challenged;

Seating and standing at bus shelters;

Lighting, fans etc. at bus stops:

Advertisements and kiosks;

Revenue collection i.e. Ticketing, Ticket checking, Cash

handling etc

Plan Submittal Requirements The Contractor shall produce plans & specification that aid & facilitate design review by

the Employer and provide adequate information for safe, efficient & high quality

construction. The plans shall include (at a minimum) the following items:

- Cover sheet & list of Standard Drawings

- General rules & general layout sheet

- Typical sections

- Roadway plan and profile

- Roadway cross section

- Bridge Plans and construction details

- Drainage schedule

- Bridge schedule

As Built drawings

The Contractor shall be responsible for producing a complete set of as-built Drawings

upon completion of the project. As-built plans shall incorporate all design changes of

field changes that occurred throughout the project duration. As built plans shall at a

minimum contain the following items in the format agreed upon with the Engineer,

Cover sheet:

Project Location Map

Locations, lengths, Reference points

Scales, north arrow, station equations

Beginning and End of project

Title Block, Signature Block

General Notes

Typical sections

Plan and Profile sheets

Alignments

Ditch Grades

Culvert/Bridge locations

Bridge layout Plans and structural details

Culvert Plans

Roadway cross sections

Site data and drawings

Site data and drawings shall available at the employer’s office and a copy shall be

provided upon request. Data and drawings provided under this section is for the

Contractors’ information only and the Contractor shall undertake detailed investigation


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and prepare detailed designs for employer’s approval.

Horizontal Alignment Design

Whereas it is desired that the proposed road follows the existing road in as far as possible,

Contractor should not assume that the proposed upgrading will follow the existing

alignment for the entire length of the road. It is expected that Contractor should propose

re-alignments where they are required to improve the geometry and safety aspects of the

road to the employer’s approval. Where possible, the proposed re-alignments shall fit

within the road reserve.

Vertical Alignment Design

The vertical alignment shall comply with the design requirements of Road Design Manual

Part I.

Road Cross-Section Minimum road cross-section shall be as specified in the Road Design manual and the

NaMATA BRT design framework (2018).

Embankment slopes

i. 1:4 for fills less than 1m

ii. 1:2 for fills over 1m but less than 4m and,

iii. 1:1.5 for fills greater than 4m.

iv. Pavement widening, Side ditches, cut off ditches and service lanes shall be designed

as per Road Design Manual, Part I.

v. Culvert outfall drains shall be designed to have the same cross section as a cut off

ditch Type 2.

Junctions

i. Minor Junction Type (minimum): As provided for in the Road Design Manual, Part I;

“Geometric Design of Rural Roads”, January 1979

ii. Extent of Improvement of the off road at the junctions (minimum): Major road Km

0.5, minor roads Km 0.05 into the off road.

Non-motorised Traffic facilities

The Contractor shall provide comfortable, safe, adequate and aesthetically appealing

non-motorised traffic facilities at proper locations.

The facilities shall be suitable for use by normal, elderly, disabled and the children.

The walking surface shall be of adequate traction to avoid sliding.

The minimum number of new footbridges shall be 1 No., however, the Contractor

shall assess the adequacy and where necessary provide for more footbridges in his bid

to ensure adequacy of the facilities.

The footbridges design criteria shall include;

(i) The vertical clearance above the road riding surface to be min.6.0m

(ii) The substructure of the footbridge should be in such a way as not to cause

obstruction to storm water drain or space for other services e.g. fibre underground

cables power lines, pipes lines etc.

The footbridge shall preferably be of composite structural members i.e concrete

substructure, steel superstructure and appropriate roofing material.

The footbridges design and workmanship shall be aesthetically appealing and user

friendly to all pedestrians (including people with disability), cyclists and motorcycles.


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5.1.3 Pavement Design and Materials Investigations

General

The pavement design shall be as per the Road Design Manual Part III: Materials and

Pavement Design for New Roads (August 1987).

The Contractor shall establish the subgrade class of all the in-situ materials along the road

based on CBR's measured on samples that have been soaked for 4 days.

Pavement Design Criteria

i. Road Design Life: 20 years

ii. Road Design Analysis Period: 20 years

iii. Minimum Design Flood Return Period: 50 years

iv. Design subgrade bearing strength: Minimum subgrade bearing strength S4

v. Pavement structure: Based on traffic requirements with minimum design traffic loading

class T0.

a. Surface Dressing/Gravel Wearing Course not recommended as the primary

wearing course.

Sub-grade and Material Designs

The Contractor shall undertake extensive soils and materials testing in relation to the:

(i) adequacy of sub grade materials on existing and new alignments;

(ii) stability of existing embankments and cuttings and their capacity for raising or

deepening;

(iii) suitability of cut materials to be utilized as fill;

(iv) identification of suitable borrow pit and gravel pit location and an estimate of the

volumes of suitable material they may yield and potential water points;

(v) Identification of suitable sources of aggregates and an estimate of the volumes they

may yield.

Appropriate sub-grade treatment and minimum sub-grade cover shall be adequately

provided in the design which is to be determined by the Contractor.

Moisture ingress into the fill and pavement layers shall be limited through the appropriate

engineering designs including appropriate surface and sub-surface drains.

The potential of collapsible soils and active sub-grades shall be investigated and

appropriate actions for treatment implemented.

Gravel and Crushed Stone Sources

The Contractor shall identify sources of suitable gravel/crushed stone sources at his own

cost. The Contractor shall obtain all necessary permits and leases prior to opening any

quarry/borrow site, and thereafter, submit copies of the permits and leases to the

employer.

The Contractor shall take all necessary steps to rehabilitate the quarry / borrow site, in

accordance to the NEMA licence and including landscaping, grassing and planting of

trees.

Sand for Concrete Works

The Contractor shall identify sources of sand for concrete and other building Works that

comply with the specifications in the Road Design Manual, Part III; “Materials and

Pavement Design for New Roads”, August 1987.


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Water for Construction

The Contractor shall identify sources of water for construction, and provide in his Lump

Sum Price for the procurement of adequate quantities of water that comply with the

specifications in the Road Design Manual, Part III; “Materials and Pavement Design for

New Roads”, August 1987. This may necessitate drilling of boreholes. Under no

circumstances will salty or brackish water be used in any part of the construction of the

road.

5.1.4 Traffic Requirements:

i). Traffic studies and data to be based on Road Note 40.

5.1.5 Hydrology/Hydraulics

General

A hydrological study shall be carried out to establish the hydraulic condition and

adequacy of the existing structures along the road, and identifying places where

additional new structures are required.

Hydrology/Hydraulic study criteria

i. Topographical scale maps: 1:50,000 and 1:250,000 shall be obtained for catchments

delineation;

ii. Catchment characteristics shall to be determined from the mapping, as follows:

Area in 2km;

Length of longest water course in km;

Catchment slopes;

Slope of longest watercourse.

Soil characteristics shall be obtained and assessed from published data (Ref

National Atlas of Kenya) and from site observations;

iii. Rainfall characteristics shall be assessed from published data and data obtained from the

Meteorological Department;

iv. Relevant discharge data shall be obtained from the offices of Ministry(s) in charge of

Water Resources and Irrigation;

v. The main river crossings shall be examined to estimate the mean annual flood and

observe any evidence of overtopping;

vi. Catchment vegetation cover characteristics shall be determined;

vii. Catchment land usage will be assessed;

viii. Flood models shall be selected and flood computations to be made based on catchment

characteristics, and adjusted to reflect observed site conditions;

ix. The flood model results shall be compared with the existing structures capacity and

recommendations shall be made for improvements, where necessary.

Methods of flood prediction

The Contactor must use TRRL East Africa flood model and any other method and adopt

the design discharge as the maximum value obtained from the two methods as long as the

values do not differ by 50%, ‘otherwise use 1.5 times the lower value.’

Sizing of Drainage Structures

i. The size of drainage structures shall be determined using design flood calculations

resulting from the hydrological study. Structures shall be sized according to the following

requirements.

ii. The Contractor shall be responsible for the confirmation of structural and hydraulic

capacity and hence adequacy of drainage structures to be retained on the road

iii. Bridge waterway area shall be designed to pass a 50 year flood with a minimum clearance

of 1.0m below soffit of beams/slab.


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iv. Box culverts of opening greater than 5 m2 shall be designed to pass a 25 year flood with a

minimum free board of 1.0m.

v. Box / pipe culverts of opening less than 5 m2 shall be designed to pass a 10 year flood.

5.1.6 Drainage

i. The Contractor shall provide a safe and well-drained corridor for use and maintenance of

the road.

ii. The design and construction of all drainage structures and appurtenances shall adequately

address functionality, durability, ease of maintenance, maintenance access, safety,

aesthetic and protection against vandalism according to Contract specifications and

standards.

iii. In fulfilling the requirements for drainage, the Contractor shall abide by and fulfil the

requirements related to drainage features while at the same time meeting requirements of

other required design elements on the project. Drainage The primary objective shall be:

• Maintain drainage pattern

• Provide culvert opening for natural drainage channels

• Prevent undue accumulation and retention of water upon and adjacent to the roadway

• Provide the roadway against storm and subsurface water damage

iv. Providing a safe driving surface for the traveling public

v. The Contractor shall be responsible for the drainage system along the project. All design

work shall comply with the Drainage Manual including the engineering analysis

necessary to design any drainage structures.

vi. Drainage design should achieve the most effective and economical methods by which

runoff water can be passed through and removed from the roadway.

vii. The designer shall check all stages of design for accuracy, completeness and compliance

with the Brief and relevant Standards.

viii. A design Summary Sheet shall be prepared for all road bridges on completion of the

design, and shall be included in the set of design drawings. The Design Summary Sheet is

an important feature of the design as it contains a summary of all major features of the

design. The main items to include on the Design Summary Sheet are:

Details of the span configuration.

The design cross-sections used in the analysis at critical positions, eg support and

mid-span.

Details of the reinforcement and/or prestress and the section capacities at the critical

sections.

The serviceability design moments and resulting stresses at the critical sections.

Live Load Distribution Factors for different loadings.

Design Live Load.

The available live load capacity at the critical sections, for use in checking heavy load

movements.

Foundation information, i.e. design bearing pressures for spread footings and design

pile loads for piled foundations.

Design Scour allowance.

Drainage Submittals/Plans

The Contractor must prepare plan sheets, notes, and details to include the following inter-

alia:

- Drainage structure sheets

- Ditches and outfall sheets

- Ditch and outfall cross section sheets

- Pipe and Box/ slab culvert tabulation

- Erosion control details and plan


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5.1.7 Culverts

Minimum size

Access pipe culvert minimum Diameter size: 600mm

Cross culvert minimum Diameter size: 900mm

Multiple box culverts: cell number should not exceed six (6) cells.

Culvert Material

Reinforced concrete shall be used for all cross and access culverts. Alternative Materials

for culvert shall be subject to employer’s approval.

Concrete Class for pipe, surround, bedding and end structures

The Contractor shall use standard drawing, Drainage Manual and Standard Specification

for the selection of the concrete class.

Culvert Documentation

The Contractor must supply the following for culvert documentation:

For minor culvert: Culvert Design Sheet

For Major culvert: Design computation

Open Channels and Ditches

The Contractor shall use standard drawing, Drainage Manual and Standard Specification

for design and construction of Open Channels and Ditches.

5.1.8 Bridge Structure

General Requirements

The Contractor shall perform structural analysis and design of bridges and other

structures included in the project.

Standards

The following is a list of publications that shall be used for all design and construction.

BS 5400 - Steel, Concrete and Composite Bridges

Road Design Manual (RDM)

Adolf Putcher Charts

BS 8110 – Structural use of Concrete

BS 1881 – Testing Concrete

Standard Culverts and Drifts Manual, 1982

Standard Drainage Structures Manual Part I

This is not a comprehensive list and other applicable publications may be required to

complete all design. The Contractor shall request clarification of any ambiguity or

conflict contained in these standards before proceeding with design or construction.

Bridge Structure Criteria

i). Design Drive Speed: Design drive speed of the Road Section

ii). Bridge Width: Same as the Subgrade Width

iii). Design Vehicle Load: BS5400 HA Load, 45 units HB Load

iv). Intersecting Angle: this is the right included angle between the route centerline in

advancing direction and the centerline of pier and front wall of abutment cap, etc;

v). Bridge Deck Slope: 2.5%

vi). Clearance: Minimum 5.5m

vii). Design Flood Frequency: 1/50


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Demolition

The Contractor shall demolish if there is substandard structures such as fords, drifts,

vented causeways, and any insufficient structures (structurally and hydraulically) along

the project. The Contractor shall design and construct appropriate structures in place of

those who would be demolished.

Design and Performance Requirement

New Bridges

For structure site(s) identified provide a Structure Selection Report as part of the Draft

Structural Report. Prepare the selection report with supporting drawings, tables, and

discussion as needed. Include the following (as a minimum):

Review the structure site data to determine the requirements that will control the structure

size, layout, and type.

Propose recommended superstructure and substructure alternative(s). Propose foundation

alternative(s). Determine the structure length, width, and span configurations that satisfy

horizontal and vertical clearance criteria. Consider hydraulic opening and potential scour

requirements. For walls, propose wall type and foundation alternatives.

Consider restrictions due to site access and transport limitations, and local material

availability.

Recommend proposed adjustments to profile alignment and grade necessary to

accommodate bridge location and freeboard requirements.

Recommend a structure layout, type and rehabilitation alternative(s) as applicable.

Include a preliminary sketch(s). More than one alternative may be recommended. State

criteria used to evaluate each alternative.

The Contractor will provide a summary of the detailed structural design criteria and

submit to the Engineer for approval.

Structural Drawings

Prepare structural drawing(s) that show all details necessary for construction of the

bridge.

The following (as a minimum) is an estimate of the Contract plan sheets required for

typical simple span structure:

Minimum Plan Sheet Requirement for Typical Simple Span Structure

Sheet Description Sheet Description

A Plan View, Elevation View, General

Notes, Profile Grade Diagram

J Typical Section

B Foundation Plan, Subsurface Profile,

Estimate

K Deck Plan

C Slope Protection L Bridge Railing

D Abutment 1 M Bridge Railing

End block

E Abutment 2 Q Transition Railing

F Wing walls R-T Rebar List

G Beam Framing Plan

H Beam

I Beam Details


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Submittals and Design Calculations

The Contractor shall prepare all plans and calculations in support of the design and in the

accordance with the standards provided in this section of the Contract Document. The

Plan and calculations shall be submitted to the Employer’s Representative as a draft for

review and comments. Any comments on the draft plan and calculations will be returned

to the Contractor for incorporating the comments during the finalization of the

documents. The Final report shall be submitted to the Engineer for approval after

addressing the comments. The final report must be approved by the Engineer prior to

commencement of any activity related with the construction of bridges.

5.1.9 Retaining walls

Standards

The Contractor shall design and construct Retaining walls in accordance with the Recent

Specification for design of Highway Bridges & guidelines and any other relevant manuals

approved by the employer.

Performance Requirements

The Contractor shall design, furnish and construct retaining walls for the project.

Gravity walls and Cast-in-place cantilever walls shall constitute acceptable retaining

walls for permanent applications provided they are done to applicable standards.

5.1.10 Traffic Marking

Standards

The Contractor shall design and install pavement markings in accordance with the

following specifications & guide lines:

Proposed Manual for Traffic Signs in Kenya， Part I；“Road Markings

Manual for Traffic Signs in Kenya，Part II， June 1975


The Contractor shall design & install pavement markings that will be uniform in type,

colour, dimensions, location & reflectivity as provided in Standard technical

Specification.

Design and Construction Criteria

Effective pavement marking shall serve as a means of informing, guiding, warming, and

controlling drivers.

Pavement marking shall comprise edge lines, centerlines, and pavement arrows, word

messages of any traffic markings necessary to provide for the orderly & predictable

movement of all traffic throughout the project. The Contractor shall consider pavement

markings when developing the geometric layout of the project.

Traffic Marking Materials

The Contractor shall furnish & install pavement markings with internally reflectorized

thermoplastic paint in accordance with Kenya Standard Specifications for construction of

Road and Bridges.

5.1.11 Road Signing


The Contractor shall design furnish and install a complete permanent sign system for the

project. The design must provide for the orderly & predictable movement of all traffic


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and provide such guidance & warnings as may be needed to ensure the safe & informed

operation of the traffic stream.

Design and Construction criteria

The sign system shall:

Provide for uniformity in shape, color, dimensions legends, illumination &

reflectivity as provided in Standard Technical Specification.

Provide adequate time for proper motorist response.

Provide for case of maintenance & service

Sign Construction

The Contractor shall:

Furnish and install all signs, posts, foundations & associated materials.

Install and construct the signs to conform to the requirements of Standard

Specifications

Provide positive guidance to the traveling public at all times during construction

by the use of new signing to ensure safe & informed operation while traffic is

maintained on the roadway.

Retro-reflective Studs (Cat Eyes)

The Contractor shall design for installation of Retro-reflective Studs as per the Standard

Specifications.

Guard-Rail, Edge-Marker and Culvert Marker Posts

Guardrails shall be installed where fill heights are greater than 3.0 m, and on these

sections, the shoulder shall be widened by 0.50 m (to 1.75 m or 2.00 m as appropriate).

Guardrails shall be provided in accordance with the requirements of the Road Design

Manual, Part I; “Geometric Design of Rural Roads”, January 1979, but incorporating

steel posts for box culverts and reinforced concrete posts at high embankment locations.

The Contractor shall provide for retro-reflective studs on the guardrails every 4 meters.

The edge marker post shall be provided at 100m interval.

The culvert marker posts and edge markers shall be of reinforced concrete design.

Road Reserve Boundary Posts

The road reserve boundary posts will be reinforced concrete type, with the chainage

engraved on the side of the post visible from the road.

The road reserve boundary post shall be provided at 100m interval and at the major

junctions.

5.1.12 Road Safety Measures Requirements

i. The Contractor shall maintain a safe environment for all road users and give special

consideration to winding potentially hazardous conditions.

ii. The designs shall incorporate Traffic calming measures in built-up areas and any other

areas where it is deemed necessary.

Street lights

The Contractor shall provide for street lighting of the additional BRT infrastructure with

minimal maintenance and operation cost and shall be required to reinstate any street


11 | P a g e

lighting that may be damaged during the course of the Works.

The poles in which the bulbs will be fitted shall have a clearance of at least 10 metres

above the riding surface.

The lighting shall be bright enough throughout the road to allow safe driving without

having to put vehicle head lights on and enhance pedestrians’ security especially at night.

The wiring connection for the street lighting shall preferably be through underground

cables.

The Street lights shall be protected against vandalism.

The preferred street lighting shall be LED light fixtures and may be solar powered

provided that the batteries can provide a minimum of 10 years maintenance free

operation.

5.1.13 Environmental and Social Impact Assessment (ESIA) Requirements

The Contractor shall prepare for approval by NEMA the Environmental and social Impact

Assessment (ESIA) Study Report.

Upon receipt of the NEMA approval, the Contractor shall implement ESMP

(Environmental and Social Management Plan).

5.1.14 Design Base Statement Requirements

The Contractor shall prepare a Design Base Statement that summarizes the key design

criteria to be used for this project and, as the design proceeds, produce a Design

Departures Report to ensure it is documented and clear where the final design departs

from the agreed design criteria.

5.1.15 Safety Audit Requirements

The Contractor shall be required to undertake a safety audit of the detailed design by an

independent road safety auditor who has experience and expertise in road safety

engineering. This individual shall not have been involved in preparing the detailed

design. The Contractor shall ensure that the audit is carried out on completion of the

detailed design, but before commencement of the civil Works, and that there is sufficient

time for the road safety auditor to undertake the audit in the country and for the auditor to

visit the site as often as necessary. In accordance with the Road Safety Audit Manual, the

detailed scope of the audit shall be agreed with NaMATA prior to mobilization of the

safety auditor. A separate Road Safety Audit Report for Detailed Design shall be prepared

for review by NaMATA.

5.1.16 Technical and Safety Audit Requirements

The Contractor is advised that a Technical and safety Audit of the project is likely to be

carried out by an independent consultant to verify and validate the appropriateness and

accuracy of the Design Base Statement, Preliminary Design, Detailed Design and

Constructed Works. The Contractor shall fully cooperate with the Technical and safety

Audit Team, consider issues identified in the Technical and safety Audit Report and, as

agreed with NaMATA, remedy the non-compliance issues identified by the Technical

Audit.

5.1.17 Permits and Licenses Requirements

The Contractor shall obtain at his own cost all licences and permits necessary for the

execution of the Contract.


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5.1.18 Details of Employer’s Personnel

The Employer’s personnel shall be as detailed in the Appendix A of this Employer’s

requirement

5.1.19 Contractor’s Personnel Qualifications

The Contractor’s Personnel Qualifications shall be as detailed in the bidder’s

Qualification Evaluation Criteria

5.1.20 Nominated Sub-Contractors

The Contractor shall engage a Nominated Service provider for the provision of

HIV/AIDS programme and gender sensitisation awareness and monitoring

5.1.21 Facilities for Employer’s Personnel

The Contractor shall ensure that the Engineer’s team is adequately supported and

equipped as detailed in Appendix B of this Employer’s Requirement. In particular it shall

ensure that there is sufficient administrative, secretarial and interpreting provision to

enable Engineer’s team to concentrate on their primary responsibilities. It must also

transfer funds as necessary to support its activities under the Contract and to ensure that

its employees are paid regularly and in a timely fashion.

5.1.22 Provisional Sums

The following provisional sums shall be included in the financial bid:

S/N Provisional Sum Amount (Ksh)

1. Allow Prime Cost (P.C.) sum of KES 5,000,000 for off-road environmental

mitigation measures to be used as directed by the Engineer 5,000,000

2. Allow a Prime Cost (P.C) sum for Employer’s Representative Staff training. 5,000,000

3. Allow a Prime Cost (P.C) sum for relocation of Services 100,000,000

4. Provisional Sum for Employer’s Nominated Service Provider for provision

of HIV/AIDS programme and gender sensitisation awareness and

monitoring

8,000,000

5. Allow a Prime Cost (P.C) sum for Land Acquisition in areas where there is

inadequate corridor to fit design which meets Employer's requirement 100,000,000

6. Allow a provisional sum for payment to Kenya Power Company for

incoming electricity supply to each electricity pillar 50,000,000

X Total 268,000,000

5.1.23 Dayworks

The Contractor shall provide a Daywork schedule as per the General Conditions of the

Contract and any amendments thereof in the Condition of Particular Application. The day

work schedule shall form part of the Contract.

5.1.24 Schedule of Payments

The Schedule of Payments shall be as detailed in the Particular Conditions and Appendix

to tender.

5.1.25 Project specific Information

NaMATA has provided information in Appendix C that is pertinent to the design and

implementation of the Project. While this information may be used by the Contractor in

preparing its bid for this project, NaMATA does not take responsibility for its accuracy. It

has been provided to the Contractor for information purposes only.

Information provided by the Client

As built drawings of Thika Superhighway

Typical BRT design

Thika Superhighway completion report

Topographic Survey maps and data for the entire link and surrounding areas;


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Files containing GPS coordinates for the entire route link;

5.2 Preliminary Design The Preliminary Design shall, inter alia, include alignment, position of the road within

the Road Reserve, proposed road cross-sections, the influence on land, environment

and utilities, to such detail that a review can be undertaken to ensure compliance with

these requirements. Prior to submission of the Preliminary Designs, the Contractor

shall submit detailed design criteria and structure recommendations by way of the

Design Base Statement for review by NaMATA. Design criteria not in compliance

with the Design Manuals should also be brought to the attention of NaMATA by way

of the Design Departures Report for evaluation and approval of design exceptions

prior to incorporation in the design. The Preliminary Design shall also demonstrate

design standards clearly so as to enable NaMATA to assess the design.

Information about consultation on technical and socio-economic matters by the

Contractor with relevant Authorities and other parties concerned must be provided.

Details of interviews held with affected land owners including contact information

and agreements reached regarding access arrangements, accommodation of services

as well as other information pertaining to the Preliminary Design enabling NaMATA

to approve such Preliminary Design.

The Contractor shall consider the following aspects:

(i) Preliminary Topographic Surveys: The Contractor shall carry out the survey to the

accuracy specified in the Technical requirements for Topographic survey and

Construction staking. The survey shall include sections of the road proposed for re-

alignment.

(ii) Preliminary Geotechnical Investigation: The Contractor shall carry out a complete

geotechnical investigation of the proposed route.

(iii) Hydrology/Hydraulics Study: The Contractor shall analyse and document

Hydrology/Hydraulics assumptions, check the size of existing drainage structures and

propose the main drainage requirements for the road. The Contractor shall document

the preliminary Drainage Design in the Hydrology/Hydraulics report. The study shall

include a narrative description and schedules of proposed drainage structures,

conditions, and facilities. All Hydrologic and Hydraulic drainage computations for

the design presented in the plans shall be included along with supporting design

information such as drainage maps, geological data and geotechnical data.

(iv) Preliminary Geometric Design of the Road: The Contractor shall design the Works

according to the agreed design criteria. The Contractor shall investigate various

alignments, assess and design the horizontal and vertical alignments, taking into

account :-

a) Agreed design criteria

b) Current and/or anticipated traffic volumes and composition, exiting terrain,

infrastructure and land use

c) Local fixed points such as bridges

d) Geotechnical and soils investigations

e) Hydrological and drainage characteristics

f) Environmental Impact

g) Social impact

h) Land-take


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(v) As the project proceeds, the Contractor shall present to NaMATA alternatives for

improvement in alignment of the road and for improvements where the road passes

through villages and settlements.

(vi) Road drawings to include:

a) Plan drawings at a scale of 1:2000 or other agreed scale to show alignments,

vegetation type, main drainage elements, right of way and clearly show areas

of land take

b) Profile drawings to scale 1:2000/1:200 or other agreed scale, to include the

existing road surface or natural ground level and proposed vertical alignment.

(vii) The Contractor shall undertake the geometric design of the road using a modern and

comprehensive (Computer Aided Design and Drafting) CADD package. This CADD

software must be capable of allowing the designer to assess different alignments along

the proposed route and also for preparation of a visual 3D representation of the

designed roads. All topographical and design data shall be supplied in a format

suitable for input to Civil 3D design software or similar. The design shall be

referenced to a line or string which shall contain details of chainage (or station),

horizontal and vertical geometry information.

(viii) Preliminary Pavement design: The Contractor shall divide the road into homogenous

sections in terms of traffic loading and strength, and propose at least two alternative

pavement options in terms of layer type, quality and thickness of pavement

considering the project traffic loadings for each section. The Contractor shall take

into account availability of suitable construction materials along the route.

(ix) Preliminary Design of Structures. The Contractor shall carry out topographic survey,

geotechnical investigation, hydrological study and others that are necessary to prepare

structurally sound and cost effective design layouts for major structures in the project

road.

a) Topographic survey for preliminary design of structures:- The Contractor shall

carry out topographic surveys of the sites of the proposed structures extending

500m to either side. Cross-sections of stream beds shall also be taken. These

surveys shall be presented on drawings at a scale of 1:1,000 in plan view

together with a longitudinal section along the anticipated axis of the structures.

The drawings shall indicate the location of the geotechnical investigations made

during the geotechnical study referred to below.

b) Geotechnical investigations for preliminary design of bridges:- The Contractor

shall carry out a geotechnical survey by drilling boreholes until he establishes a

stable ground, analyse and present the findings in a comprehensive geotechnical

report.

c) Hydrological and hydraulic design of bridges:- Hydrological and hydraulic

studies shall determine flood characteristics of the streams crossed, including the

elevation of the water surface, the velocity of flow, for a recurrence interval of

100 years.

d) Preliminary geometric design of bridges and drawings.

Location plans for bridge / structure and approaches

Longitudinal sections of approaches

Elevation of the structure

General arrangement to show type of foundations, abutments, piers and

deck


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Short report on main issues in building the bridge and how these will be

mitigated e.g. wide fast flowing river

The Contractor shall pay particular attention to the following specific issues and shall

consider the following aspects:

5.2.1 Traffic Studies

Traffic Surveys: the Contractor shall make use of the existing vehicle traffic surveys

conducted on the project road that forms part of the route. Data from NaMATA on

traffic count surveys, if available, shall be reviewed to assist with estimating the

Annual Average Daily Traffic (AADT). Traffic volumes and composition shall be

estimated.

The traffic studies shall comprise of the following:-

(i) Speed and Delay survey. This survey would be done separately for the traffic stream

and for buses, both peak and off peak period to assess the journey and running speeds

along with delays along the entire length of the corridor.

(ii) Road Network Inventory Surveys of entire length of corridor including all

Intersections and service roads in the influence area;

(iii) Boarding / alighting survey of passenger at major bus stops. This survey shall

provide an estimate of bus stop loads as well as total bus passenger demand on the

corridor;

(iv) Origin / Destination cum Opinion Survey both for bus and Intermediate Public

Transport / private modes (auto-rickshaws and two-wheelers) at all major bus stops

and intersections respectively during peak periods on sample basis. The O-D survey

for bus passengers shall be conducted at all the bus stops on the selected corridors and

shall provide an estimate of distance wise bus passenger demand on the respective

corridor. The O-D cum opinion survey for other users shall in addition provide the

potential shift to the new system;

(v) Direction-wise Classified Traffic Volume Survey All types of modes will be

counted separately and Passenger Occupancy survey at all intersections. This survey

will provide information on section wise daily and peak hour traffic volume and

composition on the corridors;

(vi) Traffic Signal time and saturation flow survey at all signalized intersections for

morning, midday and evening peaks as well as off peak period.

(vii) Parking survey (on-street and off-street) would be carried out along the entire

length of the corridor to collect the details about parking accumulation and parking

duration for peak period. The parking demand assessment would enable to plan for

providing alternate parking facility; and

(viii) Pedestrian Survey at all major intersections for peak periods. Both along and across

movements will be counted to gauge the Intensity of pedestrian Traffic for provision

of requisite pedestrian facilities as well as minimizing pedestrian vehicular conflicts.

(ix) Traffic Forecasts: the Contractor shall quantify both the direct and indirect impact of

the road development and the analytic approach must include appropriate forecasting

techniques/models and be supported by appropriate survey instruments, including:

a) Population and Settlement survey,

b) Economic and market survey; and

c) Transport survey (for motorized and non-motorized transport (NMT), including

pedestrians).

The traffic forecasts should include the generated, diverted and induced traffic. The

forecasts should include best estimate of likely demand (based on economic activity,


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past growth trends, growth in vehicle population, etc) and the more critical variables

should be subjected to sensitivity analysis. The forecasts should also include the

impact on the project area during the construction period.

(x) Axle load survey and traffic engineering: The Contractor shall use appropriate

techniques to verify and adjust the existing unrepresentative sample data from

KeNHA weigh stations and data from their axle load surveys and Equivalent Standard

Axle (ESA) and preliminary pavement design. The Contractor shall use this data to

analyse traffic and specify the design of the required traffic features, including

alignment and junction design. Based on traffic analysis, the Contractor shall

determine the location of signs and markings, guardrails and guide posts, as well as

rest areas, bus stops, and pedestrian facilities, in accordance with standards and

guidelines provided by NaMATA.

(xi) Any other Survey as required.

The above traffic data shall be compiled into a Traffic impact report.

5.2.2 Soils Materials and Pavement Investigations

The Contractor shall undertake extensive soils and materials testing in relation to the:

(i) adequacy of sub grade materials on existing and new alignments;

(ii) stability of existing embankments and cuttings and their capacity for raising or

deepening;

(iii) suitability of cut materials to be utilized as fill;

(iv) identification of suitable borrow pit and gravel pit location and an estimate of the

volumes of suitable material they may yield and potential water points;

(v) Identification of suitable sources of aggregates and an estimate of the volumes they

may yield.

The Contractor shall take samples along the project road at intervals of a maximum of 500m.

The Contractor shall assume that, at each location, three types of material representing the

existent pavement layers are to be tested. Field and laboratory tests shall include soil

classification (sieve analysis and Atterberg limits), 5 point modified proctor test, moisture

content, 3 point CBR (4 days soaked) and 3 point CBR (un-soaked).

With regard to sampling from borrow areas and stone quarries, the Contractor shall carry out

tests as described below:

(i) Testing of construction materials shall include grain size distribution, maximum dry

density, moisture content and plasticity index.

(ii) Aggregate tests shall cover specific density, relative density and water absorption,

abrasion, crushing value, flakiness index, bitumen affinity, sodium sulphate

soundness and polishing value.

(iii) For borrow areas, at least three trial holes per site are to be excavated to prove

overburden, quality and quantity of materials at each location.

(iv) For quarries, at least three trial holes and at least one borehole per site to prove

overburden, quality of material and quantity of materials.

(v) Water tests to include pH value, Chloride content and Sulphate content.

The Contractor shall include a draft sampling and testing programme (to include numbers of

each type of test for testing work) for the road, borrow areas and quarries. This shall be

refined and updated once the assignment commences.

The Contractor shall consider issues in retaining existing embankments and cut areas,

widening of existing embankments and cut areas as well as the design of new embankments,

cut areas, areas of weak subgrade, swamps etc. Calculations showing the proposals are safe,


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buildable, expected settlement as well as drawings showing assumptions for various

situations and any special Works are to be included.

Preliminary Design Report

The Contractor must submit a preliminary design report containing the following:

Construction Works or upgrade Works

(i) Design Base Statement and Design Departures Report

(ii) Description of the Works including preliminary investigation results, analyses

and interpretation of findings

(iii) Geometric design and road safety audit findings as well as analysis of design

options and recommendation of most viable option. This will include vertical

clearance calculations, sight distance calculations at bridges and other

obstructions, capacity analysis, junction design, etc

(iv) Geotechnical evaluation and Topographical survey report

(v) Preliminary materials report and pavement design with preliminary materials

investigation. This should include two alternative pavement designs for each

homogenous road section

(vi) Details regarding drainage design including positions and sizes of drainage

structures

(vii) Traffic accommodation during construction

(viii) Consideration of environmental impacts. This should include preliminary

findings with regard to environmental and social impact and road safety

(ix) Consideration of safety history for Upgrade Works

(x) Drawings consisting of the following:

Title Sheet

location maps, layout plans and profiles

typical cross sections showing cut and fill slopes

typical cross section drawings showing pavement details

Layout drawings, where applicable, indicating horizontal alignment

details, intersections and accesses

bridge drawings

drawings for cross drainage

Longitudinal sections indicating proposed vertical alignments and typical

road cross-sections and pavement details.

Structures

Compilation and submission of a preliminary design report containing inter alia the

following:

(i) Description of the Works

(ii) Traffic analysis if not already covered elsewhere

(iii) Preliminary foundation investigation

(iv) Hydraulic calculations or confirmation of previous hydraulic calculations in

the case of bridge widening (if applicable)

(v) Conceptual design

(vi) Accommodation of Utilities where applicable

(vii) Traffic accommodation during construction

(viii) Environmental impact details

(ix) Diagnostic Survey Report if appropriate.

5.3 Detailed Design The Detailed Design shall involve the preparation of detailed working drawings,

project specifications and the appropriate documentation for construction purposes.


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The Detailed Design of the Road shall include, but will not be limited to, the

following:

(i) Design Base Statement.

(ii) All working drawings, schedules and designs required for the Construction Works in

accordance with the applicable standards and codes of procedure listed herein.

(iii) Project specifications and other provisions required for the Construction Works.

(iv) Design changes to the drawings, to comply with the Engineering Requirements or as

agreed by NaMATA.

(v) A detailed geotechnical report.

(vi) A detailed topographical survey report.

(vii) Hydrology, hydraulic and Drainage design report.

(viii) A detailed materials report.

(ix) Road Safety Audit report.

(x) Design drawing(s) for bridges consisting of a general arrangement drawing shall be

submitted for approval prior to the commencement of the Detail Design. All approval

requirements of other relevant authorities shall be adhered to.

(xi) Requirements for land acquisition related to borrow areas and temporary

accommodation of traffic and details of negotiations with land owners if applicable,

according to the procedures as agreed to from time to time.

(xii) Traffic analysis and traffic loading.

(xiii) Environmental and Social Impact Statement (compliance with environmental

requirements).

(xiv) Resettlement Action Plan and valuation Report

Design Drawings

The Contractor shall prepare and submit Contract drawings as specified below. For

bidding purposes the drawings shall be reduced in scale as indicated in the section on

preparation of bidding documents or to any other scale agreed to with NaMATA. The

Contractor shall submit and obtain approval from NaMATA the layout of all drawings

prior to preparation of any drawings.

The amount of detailing produced on the drawings shall be sufficient to convey in an

unambiguous manner the intentions of the designer and to facilitate construction of the

structure. No major or significant details shall be left to the discretion of the party

responsible for the supervision of the Works or to the Contractor.

All details drawn and dimensions shown on the drawings shall be to scale, however, in

circumstances where this is not the case, it shall be clearly stated on the drawings that

they are not to scale (NTS). To all such dimensions the abbreviation “NTS” shall be

added.

(i) Standard of draughting shall comply with the requirements of BS 5070 : Part 1;

(ii) The line thicknesses used shall not be less than the following:

Dimension drawings – 0,50 mm preferably with 0,35 mm minimum thickness in the

case of small or intricate detailing, and 0,25 mm for dimension lines;

Reinforcement detail drawings – 0,50 mm preferably with 0,35 mm minimum

thickness in the case of small or intricate reinforcing steel, 0,35 mm for structure

outlines and 0,25 mm for dimension or indicator lines;

Bending schedules – 0,50 mm thickness for sketches and 0,25 mm for dimension

lines.


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(iii) The size (height) of letters for titles shall not be less than 5 mm, and for notes,

dimensions, etc., not less than 2,5 mm. The drawings shall be in black ink with the

writing on the drawing either stenciled or machine printed.

Standardized draughting practices shall be used for the arrangement of details on the

drawings, development and detailing of sections, presentation of details, dimensioning

and identification of items.

The information to be provided in the title block shall include the name of the bridge,

number of the structure, name of the watercourse, description or number of the road on

which the structure is located, kilometer distance.

Bridge drawings

For each bridge the set of working drawings shall consist of:

(i) Site plan

(ii) Longitudinal sections

(iii) Subsurface data

(iv) General arrangement drawing

(v) Foundation layout

(vi) Concrete drawing

(vii) Pre-stressing detail drawing

(viii) Reinforcement detail drawing

(ix) Parapet drawing

(x) Miscellaneous detail drawing

(xi) Bending schedules.

Major culvert drawings

For each major culvert the set of working drawings shall consist of the following:

(i) Site plan

(ii) General arrangement and concrete detail drawing

(iii) Reinforcement detail drawing

(iv) Bending schedules

Location Plan Scale

Key Plan 1: 20,000

Layout Plan and Longitudinal Section (1km) Hor: 1:2000

Plan: Contours at 0.5m intervals

Road Reserve and Coordinates

Control Beacons and Coordinates

Centre Line and 500m Coordinates

Utility Locations

Earthworks Limits

Properties in or near the road reserve

Vert:1:200

Line Diagrams:

Cross Road Drainage

Guardrails (L & R)

Kerbs (L & R)

Line Markings (L,C,R)

Road Signs

Subsurface Drain (L & R)

Side Drain (L & R)


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Location Plan Scale

Climbing Lanes (L & R)

Longitudinal Section:

Original Ground Level

Existing Road Level

Final Road Level

Vertical Alignment data

Horizontal Alignment data

Final Levels (L,C,R)

Ground Level on c/l.

Camber and Super elevation.

Cross Sections Hor: 1:2000

Cross sections are to be provided at 100 m

intervals and at significant changes in cross section

Vert:1:200

Typical Cross Sections

Benching Details for Cut and Fill and Specification

Subgrade Preparation and Specification

Pavement Layer details

Soil Survey Layout Plan Hor: 1:2000

Contours at 0.5m intervals

Road Reserve and Coordinates

Control Beacons and Coordinates

Centre Line and 500m Coordinates

Utility Locations

Earthworks Limits

Vert:1:200

Longitudinal Section

Original Ground Level

Existing Road Level

Final Road Level

Test Pit Locations and Findings

Subgrade Preparation and Widening (L & R)

Borrow and Gravel Pit Details

Borrow Pit Location Plan 1:50,000

Roads

Land Boundaries

Pit Locations

Pit Design Sheet

Detailed Location Diagram

Pit Diagram

Control Beacons

Boundary Coordinates

Test Pit Coordinates

Contours

Ownership Details

Test Pit Materials Analysis Diagrams.

Recommended Materials Utilization.

At 20m intervals


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Location Plan Scale

Drainage Schedules

Longitudinal Section through Culverts

Dimensions and Levels

Hydraulic Data

Culvert Type.

Schedule of Utility Services

Location

Service

Owner

Modification /Protection

Ducting Required

Remarks including Owners Contact (Name and Phone

Number)

General Drawings (if not covered in Design Manuals)

Typical Cross Sections

Transition Lane Details and Markings

Temporary Road Signs

Information Sign Details

Site Office Layouts

Site Laboratory Layout

Housing Layouts

Standard Culvert Details

Standard Guardrail Details

Junction and Urban Layout Drawings 1:200

Fully dimensioned layout drawings showing all road

furniture, lighting, road markings, guard rails etc for each

major rural junction and each urban or semi urban area

subject to a 50kph speed limit.

Design contours, setting out coordinates and levels

Accommodation Works Drawings and Schedules

To be prepared for each affected frontager Various

Structural Drawings Various

General Layout Drawings

Temporary Works Details

Abutment and Wing Wall Details

Deck Details

Foundations

Reinforcement Details

Scour and Erosion Protection Details

Bending Schedules

Precast Element Details

Standard Bearing Details

Railings and Ancillary Details


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5.4 Construction Works shall be carried out in accordance with the provisions of the Conditions of

Contract, Standard Specification for Road and Bridges Construction 1986 Edition

Published by the Ministry of Transport and Communication and the special

specifications in Appendix B

Testing during Construction

Tests shall be done as per the Clause 7.4 of the Conditions of Contract and the

applicable Technical Standard. The type and nature of test shall depend on the type of

work and the approved design.

5.5 Test on/After Completion

5.5.1 Test on Completion

Test on completion shall be done as per the Conditions of Contract to demonstrate

that the Project performance and Contractual requirements have been met and the

road is functional. The following test shall apply;

1. Visual inspection of Works

2. Roughness Index

3. Deflection Test

4. Concrete strength

5. Cracking measurements/tests

6. Any other applicable test

5.5.2 As Built Documents and As Built Drawings

In addition to the provisions of the Conditions of Contract, within three (3) months

after the completion of each phase of the Construction Works the Contractor shall

provide NaMATA, with a Construction Completion Report, a schedule of fixed assets

and as-built drawings, in hard copy as well as in the agreed electronic format, and as

amended from time to time and all such other records as may be required and agreed

upon. Material as-built records shall be submitted in the same manner as the as-built

drawings within six weeks of each section being completed.

5.5.3 As-built Drawing

Prior to the commencement of Test on Completion, the Contractor shall submit to

NaMATA two sets of digitally-based as-built drawings for the entire project road on a

durable medium, suitable for reproducing copies, showing full details of the Works as

Constructed containing necessary identifiers to cross reference with specific

information in the Maintenance Manual. As–built drawings shall include:

The final layout of the Works at 1:500 scale or other approved scale

Finished ground levels for the whole of the in the form of spot levels on a 5 m

square plan grid for all earthworks/landscape slopes within the extent of the

Works undertaken, and, for carriageways and other paved areas, spot levels on

cross sections at maximum 20 m centres.

As-built records of all drainage systems including pipe class and levels,

bedding/surround details. etc.

All variations instructed by the Engineer;

Full pavement details;


2 | P a g e

Earthworks details including capping layer thicknesses and any special treatment

necessary at or below sub-grade level;

Drainage details showing all drainage runs, culverts and outfalls. If levels are not

indicated on drawings, schedules should be prepared and included as part of the

as-built records;

Structures details

Types of pipes and geotextiles used by the Contractor. Pollution traps, petrol

interceptors and flap valves, including access routes or arrangements and the

location of surface water drainage and channels shall also be indicated;

The precise location and depth of spare Utility ducts and their intended future use.

Depths and locations should be recorded relative to fixed reference points;

Road lighting, including column positions and electrical details;

Road signs, including legend, size and locations;

Road markings, Safety fences, including types, anchorages etc;

Kerbing, kerb types and paved verges.

Rock fall protection;

Details of sightlines/visibility splays; and

Areas of topsoil placing, including depth, and landscaping and planting (if any).

Electrical installations

5.5.4 Geotechnical Report

The Contractor shall provide a geotechnical report which will contain all geotechnical

data gathered by the Contractor as a result of investigations for the Works and

information of relevance to the maintenance of all earthworks. The Report shall

include, as a minimum, the following:

1. Earthworks: general description of earthworks - problems and their solutions, weather

conditions, plant used, haul conditions, comparison of predicted and actual quantities

of acceptable and unacceptable material, topsoil and planting details, etc.;

2. Cuttings: location of all materials excavated (and any replacement) and their

subsequent destination in the Works (with dates). Instability problems, unusual

ground conditions, ground water conditions and problems, etc.;

3. Embankments: source and location of all materials placed (with dates), plant used,

foundation treatments and settlements, instability problems, etc.;

4. Sub grade/pavement: problems with subgrade preparation. Placement methods (and

problems) for all pavement layers;

5. Imported materials: details of all imported materials - source, use, location in Works,

suitability, performance, etc.;

6. Structure foundations: records, effectiveness and problems of soil and ground water

conditions encountered, including Temporary Works. Pile logs, pile tests and other

relevant test details. Settlement records with dates of each major stage including

backfill of abutments and approach fills (give geometry). Settlement control stations,

as-built foundation dimensions, etc.;

7. Testing: summary of Site laboratory testing - moisture conditions value, dry density,

moisture content, particle size distribution, Atterberg limits, etc with comment on

results and effectiveness;

8. Instrumentation: give as-built details, including location, purpose, readings with dates,

and effect of resulting action. Performance and usefulness of installation, etc.

9. Summary: comment on need to continue monitoring or removal from Site; and give

summary of problems experienced and design changes.


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5.5.5 Road Maintenance Manual

The Contractor will be required to supply a road maintenance manual, which is

intended to provide a reference document giving details of the road design and

construction and to identify areas where special maintenance (i.e. increased frequency

of inspection over the standard periods) is required and why. It shall be concise and

cross referenced to other relevant records, in particular to as-built drawings. It shall

contain the following:

a. A record of key design parameters (including pavement design) that could have a

bearing on future maintenance Works. Details such as assumed traffic flows used to

determine pavement thicknesses/PSV values etc should be included;

b. Details of the various pavement types and thicknesses used in the Contract, including

sub-base and capping (strengthened sub-grade) together with CBR’s taken or assumed

at sub-formation. Overlaid areas and the condition of existing foundations shall be

specifically noted. Material test results shall be listed and appended. Details shall also

be given of any pavement Works constructed during the hours of darkness. The

measurement of wind speed during laying of any wearing course material shall be

given;

c. Location and treatment of any items encountered, which could possibly become a

maintenance problem in the future such as soft areas, buried watercourses or unusual

or unforeseen conditions that arose during construction;

d. A brief description of the different material types used in embankment construction

and their locations. Any geotechnical problems that required special treatment shall be

recorded. Areas which required special drainage treatment or which need observation

after construction should be specifically noted, together with plans showing the areas

concerned;

e. A record of all features requiring particular attention by the maintaining authority,

with guidance on the type and frequency of the maintenance envisaged;

f. A record of where the road has been constructed through contaminated ground and

any special precautions that are required when working in the area both from an

engineering and health and safety point of view. Detailed location plans should be

included of any hazardous areas such as those likely to generate methane;

g. Drainage installation details and any problems with permanent drainage design and

construction. Details of any drainage runs which do not have self-cleansing velocity.

Potential problems with drainage outlets and lengths of water courses outside the

highway boundary where the Employer has a commitment to maintain them. Specific

reference shall be made to pollution control measures that have been incorporated in

the Works. This shall include pollution and petrol interceptors, pollution ponds and

flaps together with details of location, access arrangements for inspection and

maintenance, recommendations for maintenance, agreed emergency response

procedures for spillage of noxious substances and details of design and pollution

levels agreed with the relevant authority. Details of effectiveness of any temporary

drainage methods;

h. Any other items or areas for which the Employer will have a specific maintenance

responsibility, (e.g. acoustic fences and barriers, landscape areas or boundary fences,

including mammal proof fencing and details of noise fences);

i. Full details including accurate locations shall be given of any functioning

instrumentation or gas monitoring plant. The intention of any future monitoring shall


4 | P a g e

be specifically noted. Details of expected settlement of embankments should be

provided;

j. Full records of any experimental or trial features in the pavement construction or

elsewhere on the scheme, with liaison addresses and details, and details of reporting

procedures/reference;

k. Details of any operation/maintenance requirements arising from the RSA and agreed

by the Employer;

l. Details of pumping stations for highway drainage, including maintenance agreements

for pumps, availability of spares and automatic/emergency procedures for

breakdowns;

m. Any special conditions on balancing pond or ditch maintenance in terms of hydraulic

or environmental aspects;

n. Details of oil interceptors;

o. Appendices, including

key plan showing site chainage;

list of Contract drawings;

operations advice;

a copy of the Contractors defect list with programme showing outstanding Work

to be completed/rectified during the Defects Notification Period;

a copy of the Contractor’s Taking-Over Certificate for the whole or sections of the

Works

a list of Contractors and sub-Contractors and sources/suppliers of components;

and

the estimated costs of maintaining any non-standard elements;

p. full records shall also be included of any trials that have been carried out on Site; and

q. Fully detailed information necessary for a pavement management system.

5.5.6 Structures Maintenance Manual

The Contractor shall compile a structures maintenance manual in accordance with

Relevant Standards and in accordance with best international practice. The structures

maintenance manual shall include the following headings and sub-headings:

Inventory General Inventory Details

Structure Type Details

Structure Summary

Drawings Location Plan (and/or Strip Map)

General Arrangement Drawings

As-Built Drawings

Design and Check Certificates

Construction Compliance Certificates

Key Correspondence

Design Drawings

Design Option Choice

Construction Special Construction Techniques

Construction Problems and Repercussions

Materials, Components and Treatments Materials

Components


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Surface and protective treatments

Certification and Tests

Operation Manual

Log Book

Access

Inspection Acceptance Inspection

Inspection Schedule

Inspection Records

Maintenance Routine Maintenance Schedule

Design Features Affecting Maintenance

Maintenance Cycle

Lifecycle Maintenance Plans

Assessment and Load Management Assessments and Review

Load Management

Legal

Environmental

Supplementary records

The structures maintenance manual shall include, without limitation:

1. The original (master) set of full size drawings, on a durable medium suitable for

reproducing copies, showing full details of the Works as constructed at an appropriate

scale;

2. A design calculations report. The Contractor’s designer shall prepare the design

calculations report which shall include, for each major element of the Works, design

the following information:

A description of the design philosophy, referring to principal standards employed

and

The various design parameters, and loadings used during design;

A schedule of principal calculations (including checks) required to define the

design details of the Contractor’s proposals forming the scheme; and

Copies of selected principal calculations, and records of checking procedures as

required by the Engineer;

3. Photographs of each structure. The photographs should show the general structural

elevations together with particular details such as bearing shelves (showing access for

inspection) and abutment inspection chambers. The photos should show good and bad

details with a note suggesting how the detail might be usefully improved in the future.

A general view of the bridge/structure in the surrounding landscape is also required.

Photographs must be in colour and to be a good standard. The colour prints should be

175 mm by 125 mm in size or any other agreed size and should be mounted and titled,

either in one album or in A4 loose leaf plastic wallets. The title should include, as a

minimum, the following information:

Structure;

Description;

Contract Name;

Designer;

Contractor;

Date; and

Photograph Reference; and

4. Fully detailed information necessary for a bridge management system.


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5.5.7 Electrical Installations Maintenance Manual

The Contractor will be required to supply an Electrical Installations Manual, which is

intended to provide a reference document giving details of the installation design and





a) Sufficient as-built information and test certificates to enable any electrical equipment

to be operated on a day to day basis

b) The installation shall be commissioned and substantially completed so that no part of

the installation shall need to be de-commissioned for either electrical or civil remedial

Works. Adequate access shall be provided to the appropriate standard and shall be

compliant with the health and safety regulations;

c) As-built drawings details including site details, electrical circuits and electrical loads.

Any lines of demarcation between the Employer and local authorities must be clearly

identified. Details of mechanical equipment and labels;

d) An inventory of spare equipment held, quantities and where stored shall be provided

to the Employer;

e) An electrical certificate of compliance shall be handed to the Engineer.

5.5.8 Lighting Installations Manual

The Contractor will be required to supply a Lighting Installation manual, which is

intended to provide a reference document giving details of the installation design and





a) details of column supplier, make of lantern and model type, modification status, lamp

setting within lantern, lamp type and make of photo electrical cell (including serial

numbers of all units), shall be notified to the Engineer;

b) Schedules of equipment installed during the Works;

c) Schematic layouts of power distribution; and

d) A record of all cable joints.

5.5.9 Test after Completion

Test after completion shall be done as per the Conditions of Contract to demonstrate

that the Project performance and functionality of the road. The following test shall

apply;

1. Visual inspection of Works

2. Roughness Index

3. Deflection Test

4. Concrete strength

5. Cracking measurements/tests

6. Any other applicable test


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CONTRACTOR’S REPORTING OBLIGATIONS

The Contractor shall be required to submit the following reports/documents to the Employer's

Representative during the project and at the completion of the Works for approval or

otherwise as a routine submission.

The Contractor is advised that there shall be project monitoring site meetings.

The Contractor shall include in the Contract Price costs related to Employer’s personnel

attending scheduled and ad hoc site related meetings where necessary. The costs shall cover

road and air travel, accommodation allowances, meals, among others.

The meetings at minimum shall include;

i. Preliminary and detailed design presentation meeting

ii. Presentations meeting with the project Key stakeholders

iii. Scheduled monthly progress monitoring site meetings

iv. Additional one ad hoc meeting per month

No extra cost will be paid to the Contractor for detailed design drawings and needed site

investigation. These costs are deemed to be included in the Contract Price.

5.6 Progress Monitoring The Contractor shall prepare the following project planning and progress reports:

Report Timing Description

Inception Report 4 weeks

from order

to

commence

Confirm methodology and work plan, task assignment,

project team and staff schedule and Log-Frame indicators

Project Control

Plan

6 weeks

from order

to

commence

Define all quality and performance controls for the

assignment

Monthly

Progress

Reports

Monthly* Concise summary of progress and key achievements in

previous month; planned activities for coming month; EVA

or similar update, identify critical issues to be addressed

and report against Log-Frame indicators. The Monthly

Progress Reporting should also include a presentation on

the Monthly Report to be made by the consultant to

NaMATA.

Quarterly

Progress

Reports

Quarterly* Update activity and staff schedule showing actual against

planned progress and achievement of Log-Frame

milestones / deliverables. Description of work completed in

previous quarter and planned activities for coming quarter.

Summary of issues addressed, identification of potential

problems, delays, etc. Quality Management Report. The

Quarterly Progress Reporting should also include a

presentation on the Quarterly Report to be made by the

consultant to NaMATA.

Draft 4 weeks Comparison of actual versus original planned activities,


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Report Timing Description

Completion

Report

before

Contract

end

inputs, costs with reasons. Key issues raised and addressed

during the assignment. Evaluation of performance against

Log-Frame indicators. Outstanding issues.

Recommendations to NaMATA on how to improve service

provision. The Draft Completion Report should also

include a presentation on the Report to be made by the

Contractor to NaMATA.

Final

Completion

Report.

1 week after

Contract

end

As above, updated with final activities, inputs, costs, plus

incorporation of comments from NaMATA.

* Submission dates to be agreed with NaMATA

5.7 Contents of Monthly Progress Reports The Contractor shall submit a monthly progress report, and in any case accompanying

each interim payment request consisting of the following:-

A progress narrative;

Quality certifications;

Monthly baseline progress schedule update;

Monthly subContract report;

Quantity calculations;

Statement of materials and labour request

Order on Contract status report;

5.8 Contents of Progress Narrative Report The progress narrative shall summarize the following information:-

Activity and progress for the Contract, including design and construction and

identification of the start and completion dates of work on any major activities;

Quality Control efforts, including results of any Design Reviews and/or quality audits;

Problems/issues raised in previous progress reports or resolved during the period;

Critical schedule issues and proposed resolutions, proposal of actions planned to

correct negative float and explanation of potential delays and/or problems and their

estimated impact on performances and the substantial completion date; and

Issues which may need NaMATA’s attention on action for the next month, including

Design Reviews

5.9 Contents of Quality Certifications Report The Contractor shall submit monthly a certificate signed by the Design Quality Control

Manager and the Construction Quality Control Manager certifying the following to the

previous month:-

That all work, including that of the Designer, subContractor, suppliers, etc has been

checked and/or inspected by the Quality Control staff and that all work, except as

specifically noted in the certification, conforms to the requirements of the Contract; and

That the quality plan and all measures and procedures therein are functioning properly

and are being followed, except as specifically noted in the certification.


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5.10 Contents of Order on Contract Status Report The Contractor shall provide a report of outstanding order on Contract requests

containing the following:-

The issue title;

A brief description of the change;

Any outstanding issues to be resolved;

The estimated cost and time implications; and

Projected resolution date.

5.11 Technical Reports In addition to the routine progress, inception and assignment completion reports described

above, the Contractor shall prepare the following technical reports, initially in draft form

for discussion with NaMATA and other relevant parties, and as Final Reports for as

approved by NaMATA.

The Contractor shall submit two electronic copy and one original hard copy of all draft

Technical Reports to NaMATA. Electronic reports shall be in a format that can be read

by Microsoft Office 2007 or earlier. NaMATA shall endeavour to review and approve or

comment on the draft reports and communicate its comments to the Consultant within

two weeks of their receipt. Documents and reports which are not structured

comprehensively will not be considered draft and will be returned to the Contractor for

revision.

The Contractor shall submit one electronic copy and one signed hard copy of all Final

Technical Reports to NaMATA.

The data files, if any, from calculations or drawings carried out using specialist software,

for example Road Design, Structural Design or Computer Aided Design, shall also be

submitted to NaMATA on non-rewritable discs or other agreed format. NaMATA shall

be the owner of all reports and documents submitted as a result of these services.

1. Design Base Statement

This shall define the set of design criteria and assumptions that are agreed by NaMATA

as the basis of all design work for the project. This may include revisions and alternatives

to the relevant technical manuals where appropriate.

2. Feasibility Study Report

This shall include a summary of all analysis carried out to assess the feasibility of the

proposed project, including route assessment, traffic studies, economic and financial

evaluation.

3. Preliminary Design Report

This shall include a summary of preliminary data collection and engineering

investigations including analysis and interpretation of findings, and preliminary design

drawings, cost estimates, risk assessment, and response to the safety audit findings.

4. Topographic Survey Report

This report shall contain a detailed description of the method of survey, a list of

established control points with their coordinates, the location of traverse control points, a

list of inter-visible control points, a list of scale factor for each established control point,

check control points, etc. All data shall be in electronic format for digital terrain model

usage.


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The report should be sufficiently detailed to provide the supervision consultant and the

Contractor with adequate and easily referenced survey information during the

construction stage.

5. Hydrological and Hydraulic Report

This report shall detail all assumptions, standards and criteria used in the calculation of

peak run off from each catchment, and such calculations shall be submitted in full.

Hydraulic calculations shall be submitted for each existing or additional drainage

structure.

The condition of each existing structure shall be summarized and reasons stated for its

abandonment, extension or enlargement. The need for erosion or scour protection for

each structure shall be evaluated and quantified.

6. Soils Materials and Pavements Report

This report shall summarize all geotechnical, soils and pavement investigation findings,

including investigations relating to the identification and estimated volumes of borrow

pits, gravel pits and quarries.

Full details of identified geotechnical problems along the road alignment, such as weak

sub-grade and slope stability problems, shall be documented and calculations provided.

Remedial measures options shall be proposed and evaluated and quantified.

Testing regimes shall be described and all test results annexed.

7. Design Options Report

This shall be prepared where a number of design options have been considered and shall

include a description, summary of the analysis and recommendations as to the preferred

option proposed by the Contractor.

8. Detailed Design Report

The Report shall include a concise Design Statement, that provides a summary of all

design standards, criteria and assumptions used to prepare the design, and the dates and

scope of all survey and data collection activities. This shall be prepared in tabular form

and act as an Executive Summary to the design report.

The main report shall fully detail:

horizontal and vertical alignment design including the identification of key

constraints and considerations and mass haul calculations;

road pavement and drainage design including evaluation of whole life cost

options;

Structural Reports for all bridge and structures design, covering issues of

standardization, prefabrication, ease of construction and including annexed

detailed design calculations for each major structure;

Borrow pit, gravel pit and quarry identifications and design, including details of

haul routes and materials distribution within the Works;

Design of all highways ancillary features (safety fencing, road marking, traffic

signs, etc);

Provisional Traffic Management Plan.


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The report shall include a list, in each section, the relevant design standards followed and

a Departures Report identifying all instances where these standards have been deviated

from and the reason for such deviation.

The report shall include the estimated Construction Quantities and Economic Analysis of

the presented design.

The report shall include a provisional traffic management plan detailing how motorized

and non-motorized traffic and pedestrians shall be accommodated during the construction

phase.

9. Road Safety Audit Reports

The reports for safety audits at each stage of the design process shall be prepared in

accordance with the Road Safety Audit Manual. The Contractor shall also prepare the

Responses Report to demonstrate how each item raised in the audit reports has been

addressed.

10. Environmental and Social Impact Assessment Report

The Contractor shall prepare the status of implementation of the EMP contained in the

Environmental and Social Impact Assessment Report (ESIA) prepared by NaMATA.

11. Special Specification

The design manual contains many options in relation to both materials requirements and

methods of construction. During the construction stage, the project site conditions and

availability of materials may render some options inappropriate. Further, for future

maintenance purposes there may be a need for standardization, particularly in relation to

street furniture and road markings.

The Contractor shall therefore review the General Specification and recommend specific

options, or possibly additional options, which shall be incorporated into the Works after

approval by NaMATA.


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6 QUALITY ASSURANCE

6.1 Requirements

The Contractor shall operate a quality management system complying with ISO 9001:

2001 for the duration of the Contract.

The quality management system shall describe the management, organisation,

responsibilities, procedures, processes, resources and programme for the Works and

shall cover all stages of the Contract including design, procurement, execution,

construction, completion, testing, commissioning and activities during the Defects

Notification Period. The quality management system shall be contained in:

a. the design quality plan; and

b. the construction quality plan.

Where a quality plan refers to or relies on the Contractor’s quality manual or

procedures the relevant part of that manual or procedure shall be reproduced in the

relevant Quality Plan. There is no need to supply a complete quality manual.

6.2 Quality Plans

Specific quality plans shall be based on the requirements shown below unless

otherwise agreed by the Engineer and shall be submitted in two stages.

Stage 1 quality plans are required to be submitted with tenders and shall contain the

information required by Sections 22.3 and 22.4 below.

Stage 2 quality plans shall fully satisfy the needs of the Contract, the requirements of

ISO 9001:2000 and the relevant parties’ quality manuals and procedures. The stage 2

quality plans shall be approved by the Contractor’s Quality Director and shall then be

submitted to the Engineer for review and approval prior to commencement of any

related activity. No Work shall commence prior to the relevant quality certificate

(Annex 5) having been approved by the Engineer.

Each quality plan shall indicate “hold points”, i.e. points where no further Work or

activity will proceed without the written approval of the designated person identified

in the related quality procedure or Work instruction. All quality plans shall be

submitted with a completed quality certificate.

6.3 Design Quality Plan (Stage 1) The design quality plan (stage 1) shall contain (as a minimum):

• A copy of a current certificate from an accredited certification body showing that the

Contractor’s designer, and any associated or subContracted parties, operates a quality

management system complying with ISO 9001:2001;

• Identification of key personnel, with CV's, to be engaged in the design;

• Identification of key personnel, with CV's, to be engaged in checking and

• certification of the designs (where appropriate);

• List quality procedures to be provided;

• identify specialist activities and personnel;

• Describe arrangements for quality control; and

• Identify hold points.


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6.4 Construction Quality Plan (Stage 1)

The construction quality plan (stage 1) shall contain (as a minimum):

• A copy of a current certificate from an accredited certification body showing that the

Contractor, and any associated or subContracted parties, operates a quality management

system complying with ISO 9001:2001;

• Identification of key personnel, with CV's;

• A list of Subcontractors to be employed;

• A list of quality procedures and method statements to be provided (paying particular

attention to control of Subcontractors' Work);

• Description of specialist activities and personnel;

• Description of arrangements for quality control of purchased products and materials;

• Description of control of workmanship;

• Identified hold points; and

• The Contractor’s designer's key personnel for examination of the Works, with CV's. The

Contractor shall provide an organisational chart showing the interrelationship between

these staff, design office staff and the Contractor’s staff for construction.

6.5 Quality Audits

The Contractor shall afford full opportunity for the Engineer to examine and audit his

quality management system and quality plans and those of its Subcontractors and

suppliers to ensure that the requirements of the Contract are being met. These quality

audits will be undertaken on a regular basis but reasonable notice shall be given to the

Contractor by the Engineer of the date of any such audit.

The Contractor shall rectify all non-compliances notified as a result of the audit by the

Engineer within the timescale set for such notification.

It is expected that the frequency of audits will be as follows:

a. Contractor and Contractor’s designer - no more than 2 audits per year; and

b. Supplier - 1 audit per year of a sample percentage.

In the event of specific problems arising, special audits, over and above the stated routine

audits may also be performed.


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Appendix A:

Special Specifications for Road and Bridge Construction


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Appendix A:

Special Specifications for Road and Bridge Construction

Description Clause Special Condition

Location and Extent

of Site

101 As specified in the Employer’s requirements.

Extent of Contract 102 As specified in the Employer’s requirements.

Drawings 103 As specified in the Employer’s requirements.

Programme 104 As specified in the Employer’s requirements.

Order of Work 105 As specified in the Employer’s requirements.

Submissions to the

Engineer

106 Time for submissions shall be as specified in the

Employer’s requirements.

Certificate of

Completion

107 The minimum length of road for which a Certificate of

Completion will be issued shall be as stated in the

Particular Conditions of Contract.

Method of

Construction

108 The Employer’s Representative normal working hours

shall be as stated in the Particular Conditions of

Contract.

Health, Safety and

Accidents

117 Add the following Sub-Clauses

(l) Compliance with the Occupational, Safety and Health

Act (OSHA), 2007.

(m) The Contractor shall take an active role in civic and

public health education to his employees and the

community in general. To this end the Contractor shall

initiate and co-ordinate a HIV/AIDS awareness

programme as detailed in the Employer’s requirement.

Use of Explosives 119 Add the following Sub-clause

119.1 Explosive and Blasting

The following shall apply to all provision, handling,

storage and use of explosives:

(a) The Laws of Kenya governing explosives

and other requirements and regulations of the

Government of Kenya and other authorities shall be

complied with.

(b) No explosives of any kind shall be used

without the prior written consent of the Employer.

Once this consent is granted, the Contractor shall be

solely responsible for obtaining, handling,

transporting, storing, accounting for using and

disposal of surplus detonators, fuses, bulk explosives

and any other thing associated with blasting, and for

complying in all respects with the safety and any

other regulations of the Government of Kenya for

blasting and shall indemnify the Employer against all

consequences whatsoever arising out of the consent

so given by the Engineer.


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(c) The Contractor shall be solely responsible

for the provision, supply, handling, storage and

transportation of all explosive ancillary materials and

stores and all other things of every kind whatsoever

required for blasting operations and shall not

delegate or sub-Contract these activities without the

approval of the Employer.

(d) Before issuing the Contracts completion

Certificate, the Contractor shall remove all unused

explosives from the site on completion of the Works

or which are ordered by the Engineer, and shall

submit to the Employer written confirmation of

compliance with this instruction.

(e) The Contractor shall submit to the

Employer monthly returns detailing the quantity of

explosive brought to site together with quantities

used during the month and the location and quantity

of rock blasted.

Protection of Existing

Works and Services

120 Add the following:

Any damage to, or interference with, existing utilities,

caused by the Contractor’s operations during the

progress of the Works, shall be deemed to be the

responsibility of the Contractor, who shall undertake to

make good at his own expense any damage so caused to

the existing underground utilities or other features. The

Contractor shall be liable in respect of all claims arising

from such damages or interference that may occur.

The Contractor shall be responsible for arranging in

liaison with the relevant authorities as soon as the

requirements are known for the moving of or alterations

to services such as power and telephone lines, water

mains, sewers and surface water drains which are

affected by the Works. The arrangements for such

moving or alteration shall be subject to the agreement of

the Employer and the relevant authorities.

Diversion of services 121 Add the following;

a) The Contractor shall acquaint himself with the

position of all existing services such as sewers, water

pipes, underground drains, cables for electricity and

telephone lines, telephone and lighting poles etc

before commencing any excavation or other work

likely to affect existing services. The cost of all plant,

equipment and materials, labour, technical and

professional staff, transport and the like necessary for


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determining such locations, including making good

any damage caused to such services, all to the

satisfaction of the Employer, shall be included in the

tender rates. No other payment will be made for the

costs of such operations, or for making good of

damage caused thereby to the existing services.

b) The Contractor shall pay any charges arising from

the moving of such services for which Provisional

Sums have been included in the Schedule of Prices.

Subject to the agreement of the Employer and upon

production of receipts, the Contractor shall be

reimbursed in interim certificates the net cost of such

moving or alteration plus the percentage inserted in

the Schedule of Prices for all costs and profits in

making the payments.

c) The Contractor shall be entirely responsible for and

shall repair at his own cost, any services that may be

damaged by his plant, equipment or personnel for not

following the laid down procedure of locating and

shifting services, or damage that may occur

subsequent to alteration of such services. The

Contractor shall indemnify the Employer against

claims arising from damages to existing services.

Liaison with

Government Officials

and Police


In addition to the requirements of maintaining liaison

with Government Officials and Police, the Contractor

shall be responsible for acquainting himself with all

current and valid ordinances or regulations, which may

affect the work.

Provision of land 124 Notwithstanding the provisions of this clause, all

requirements of land for deviations, quarries, stockpiles,

spoil areas and borrow pits when not in the road reserve

but required for construction purposes shall be approved

by the Employer, but the Contractor will make necessary

arrangements with the property owners concerned and

pay all charges arising therefrom, on or before

completion of the Contract.

The Contractor shall remove all temporary Works and

shall restore all such land to the condition in which it

was immediately prior to the occupation thereof as far as

is reasonable and practicable. No separate payment shall

be made to the Contractor on account of these items and

the Contractor shall make due allowance for them in his

rates.


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The Employer shall not provide land for the Employer’s

Personnel houses.

Any encroachment of the road reserve, for example by

kiosks, shall be brought to the Employer’s attention by

the Contractor at the earliest opportunity.

Water Supply


There are some seasonal natural water courses, water

pans and boreholes which could be used as water

sources. In addition, there are privately owned boreholes

whose use can only be through private arrangements

between the owners and the Contractor.

The Contractor may create additional water sources by

systematic harvesting and conservation of seasonal

surface water runoff through various methods including

development of river courses, diversion of runoff to

borrow pits or other excavations he may have made. The

Contractor may also opt to drill new boreholes. No

separate payment will be made for such Works except

when the Contractor has received approval to sink

boreholes in which case payment will be made at rates

entered by the Contractor in the Schedule of Prices.

Before harvesting water from the natural watercourses,

water pans and boreholes, the Contractor will have to

seek the approval and obtain permits from the Ministry

responsible for Water and Natural Resources.

Excavations, borrow pits or natural ponds purposely used

for water harvesting shall be located, shaped, fenced or

otherwise safeguarded to the satisfaction of the Employer

so as not to present a danger to the people or animals nor

result into soil erosion.

In all cases and at all times the Contractor shall comply

with the regulatory provisions of the National

Environment Management Authority (NEMA). No

separate payment will be made for complying with

NEMA regulations.

Information from

Exploratory Borings

and Test Pits

127 Delete the contents of Clause 127 and substitute with the

following Sub-Clauses:

127.1 Materials Report

The Contractor shall include the material report

information from Exploratory Borings and Test pits.

A preliminary materials report may be availed by the

Employer for the Contractor’s information only, and any


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conclusions in regard to suitability of materials, location

of borrow pits and material quantities, made by the

Contractor based on this information, shall be his own

responsibility.

127.2 Trial Sections

The Contractor shall allow in his programme for

construction of trial sections and carrying out tests upon

them as directed by the Employer. Trials would normally

be required at the start of each pavement layer and if

change of method or equipment deems it necessary as

directed by the Employer. The time for completion of the

Contract shall not be extended because of the time

needed to construct trial sections and evaluate the tests

on them.

At least fourteen (14) days before the work of laying any

pavement layer is commenced the Contractor shall

construct a trial at least 100 m in length and to the full

construction width and shall be laid to the specified

depth for the material. For each trial the Contractor shall

use the materials, mix proportions, mixing, laying,

compaction plants and construction procedure that he

proposes to use for the main work. The main work of

laying the pavement layer shall not be commenced until

this trial has been tested and approved by the Employer.

No variation in the construction procedure, mix

proportions, size, grading or source of any of the

constituents shall be made without the agreement of the

Employer who may first require new trial sections to be

carried out.

Trial sections, which eventually prove satisfactory, will

be paid for using the rates under the appropriate items in

the Schedule of Prices, as if the trial sections were part of

the normal work. No separate payment will be made for

trial sections and testing.

Signboards 131 Add the following Sub-Clause:

131.1 Provision of Signboards

At the commencement of the Contract, the Contractor

shall provide and erect five( 5No.) signboards, to be

located at the locations to be shown on the ground by the

Employer’s representative, and as instructed by the

Employer. All the signboards shall comply with the

requirements and details shown in the Book of


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Drawings. Any amendments to the details in the Book of

Drawings, prior to the signboards being erected, shall be

with the approval of the Employer.

Housing

accommodation for

the Employer’s

Personnel, office and

laboratories for the

Employer’s Personnel

with laboratory and

survey equipment and

furniture

132 Facilities for Employer’s Personnel

Mobile Toilets

The Contractor shall provide adequate clean mobile

toilets on the various construction sites.

(a) Radio communication equipment

The Contractor shall install, maintain and license as

necessary a radio communications network for the

duration of the Contract and for the exclusive use of the

Employer. The communication network shall be

complete and shall consist of one fixed base radio station

complete with all accessories and complete trans-

receiver stations for each of the Employer’s Personnel

staff cars, mobile office and laboratory. The equipment

provided shall have a range adequate for mobile units at

extreme ends of the Site to communicate with each other

and/or with the central control. The model and make of

the radio communication system shall be approved by

the Employer.

The Contractor shall be responsible for obtaining all

necessary permits and licenses needed for the operation

of the radio call services. The Contractor shall maintain

the equipment in good working condition, including

charging of batteries for the mobile units.

Failure by the Contractor to provide or maintain the

equipment shall make him responsible for all costs that

may be incurred as a result of the Employer’s personnel

using alternative means of communication, including

delays in supervision and approval of the Works.

Ownership of the radio equipment shall revert to the

Employer on completion of the Contract.

Payment for complying with this requirement is included

in the Schedule of Prices.

(b) Mobile phones

The Contractor shall provide, connect and maintain six

(6) mobile phones for the exclusive use by the Employer

and for the duration of the Contract. The Contractor shall

provide airtime for these mobile phones as directed by

the Employer.


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Employer’s Personnel Laboratory

The Contractor shall provide a fully equipped and

furnished standard ‘mobile’ laboratory with equipment

indicated in table below and maintain it for the duration

of the Contract. The mobile laboratory exterior shall be

of weather-proof construction material, provided with

mosquito-proof and burglar-proof windows and lockable

doors and suitably insulated against heat and cold, all to

the satisfaction of NaMATA in respect of construction,

design and siting. The floor shall be adequately damp,

and termite proofed.

The laboratory shall be connected with a piped potable

water supply, and 24-hour power supply suitable for

running the laboratory equipment, and with adequate

lighting and power points to the satisfaction of NaMATA

Equipment and Apparatus to be provided for the Employer’s Personnel mobile

laboratory

Scales and Balances Sample Preparation Equipment

No Item No Item

2

Heavy Duty Solution

Balance, 20 Kg Capacity ± 1

g

1 Hydraulic Sample Ejector

1 8-12 Kg Capacity Electronic

Balance, ± 0.1 g

1 Soil Mortar

1 5-8 Kg Capacity Electronic

Balance, ± 0.1 g

1 Soil Pestle

1 200-300 g Capacity

Electronic Balance, ± 0.01 g

1 Paraffin Warmer (2 qts.)

2 Buoyancy Balance, 6 Kg x

0.1g

1 Sealing Paraffin (50 lbs.)

Classification Equipment (BS1377) 1 Cone Mould and Tamping Rod, set

No Item 1 Density Basket

2 Complete Liquid Limit Set

(Casagrande ) Aggregates (BS 812-Complete set)

2 Plastic Limit Set Complete No Item

1 Pocket Penetrometer 2 Flakiness Gauge

1 Shrinkage Troughs 30 Sodium/Magnesium Sulfate salt, Kg

2 Shrinkage Limit Device 1 Los Angeles Abrasion Machine


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Complete complete with all accessories

Specific Gravity Equipment (BS 1377)

(Coarse and Fine, also see Concrete Test

Set)

1 Organic Impurities Test complete

Set

No Item 1 Aggregate Crushing Value complete

set

1 Pycnometer Top and Jar 1 Aggregate Impact Value Device –

complete

4 Specific Gravity Bottles,

100ml.

10 Aluminium trays (0.45 x 0.2 x

0.03m)

3 Specific Gravity Bottles,

220-250 ml Field Density Test

Compaction Equipment (as per BS

1377)

No Item

No Item 4 25mm Steel Chisel

3 Procter Rammer (2.5 Kg) 4 Large Sand Scoop

6 Procter Mould (1 Liter) 10 Peg

5 Heavy Rammer (4.5Kg) 4 Density Pack

30 Ounce Moisture Content

Cans, 50 ml

4 Mixing Trowel

2 Dozen Straight Edge, 12” 4 Rubber Mallet

6 12” Ruler Knife 4 Field Density Plate

2 Vacuum air cleaner 4 Sampling Spoon

36 Complete set of CBR

Moulds

4 Sand Density Apparatus,

12 Swell Gauges complete with plastic jugs, set

Concrete Testing 4 Plastic Jugs and one gallon field

cans

No Item 4 Steel Hammer, 1 Kg

1 Concrete Measure ½ (cu. ft). 1 Cylindrical Container for Sand

Calibration, H = 152, dia = 152

4 Slump Cone, Set 2 Troxler or similar nuclear density

testing apparatus complete with

4 Tamping Rod Relative Density of Cohesion-less Soils for

Sand

4 Straight Edge No Item

2 Folding Rule, 3 m 1 Complete Relative Density Set.

220/50/1 ph A.C. (0.1 and 0.5 cu. ft.)

36 Cubic Moulds, 150x150x150

1 2000 Kn. Capacity Testing

Machine

1 Mixing Pan, 24 x 24 x 3” Deep

1 Guard for above tester, Set 1 Portable Platform Scale

1 Cubic Specimen Capping

Set

1 Straight Edge

6 Concrete Curing bottle, with

Thermometer

1 Hoist, minimum lifting capacity, 125

kg.

2 Cyclap Concrete Capping

Compound - 100 lbs Water

1 Concrete Test Hammer No Item


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(Schmidt Hammer or

equivalent)

Sand Equivalent Test 1 Quality of Water Test, complete Set

No Item Sampling Bituminous Materials

1 Sand Equivalent Test Set No Item

10 Sand Equivalent Stock

Solution 1 kg Bottle

24 1Qt. Sample Can

Moisture - Density Test (BS 1377) 24 1 Qt. Small Mouth Can

No Item 6 Hubbard - Carmick Specific Gravity

testing Bottles

1 CBR Loading Machine,

electrical Mechanical Analysis of Soils

5 Heavy Compaction Rammer

(4.5 Kg) No Item

45 CBR Mould with all

accessories

1 Hydrometer, ASTM 151 H

2 Slotted Surcharge Weight 4 Stopwatch 30 min., 1/5 sec.

24 Surcharge Weight 1 Beaker Glass, 250 ml.

2 Filter Screen 6 Graduated Cylinder, 100 ml

2 Trimming Knife, 6” Blade 1 High Speed Stirrer

4 Plastic Graduated Cylinder,

100 ml.

3 Dispersing Agent, Kg


200 ml. Penetration of Bituminous Materials


1000 ml

Bitumen Penetrometer (Automatic

and Hand Operated)

10 Wash Bottle 12 Needles-Stainless steel or brass

Grade 440c

4 Small Sand Scoop Containers-Metal or glass cylindrical

flat bottom (tin boxes) 90ml capacity

4 Flexible Spatula 6”. Blade

1” wide

Water Bath

2 Sample Extruder Transfer dish for container

3 Collar, Detachable Thermometers for water bath

3 Tripod Stop watch or electric timer

2 Spacer Disc Heater-oven or hot plate

Asphalt Concrete Testing Viscosity of Bituminous Materials

No Item No Item

1 Bitumen extraction machine

(SMM type)

1 Kinematic Viscometer (Complete)

6 Beakers for above As

required solvent

2 Thermometers

2 Extractors 1 Water Bath (Thermostatical)

100 Cartridges for extractors 1 Timer

2 Bi-metal thermometer (0 –

300 0c) 100 and 300mm Time of Setting of Hydraulic Cement

2 Electrical thermometer (0 –

300 0c) No Item

1 0.10m core drilling machine Scales


11 | P a g e

with 12 core drills

Sampling and Testing Bituminous

Materials

1 Weights, Set

No Item Glass Graduate – 200 or 250 ml

capacity

12 0.5 ltr. Sample Can 1 Vicat Apparatus

12 0.5 ltr. Small Mouth Can Aggregate Testing

1 Penetro-meter with 5

needles No Item

1 Softening point devices

including heating

1 Flakiness Sieves

Marshall Test Miscellaneous

No Item No Item

1 Bench Mixer, 15 lt. capacity 1 Dynamic Cone Penetrometer (DCP)

2 Stirring Rod 1 Spare DCP Set - Penetrometer Shaft

and Hammer

1 Automatic Marshall

compaction machine with

hammer and pedestal

1 Heavy Duty DCP set(capable of 5m

depth)

12 Marshall compaction

moulds complete As

required filter paper for

moulds

40 Spare cones (additional cones to be

supplied as required)

1 Automatic Compression

Machine with flow and

stability gauges

1 Electric or petrol engine powered

light duty penetrometer on mobile

platform capable of penetration to 15

m depth, to include toolkit, spare set

of rods, sampling tubes to collect

undisturbed samples, spares for

engine, and 40 spare cones

(additional cones and rods to be

supplied as required)

1 Sample ejecting device 1 Piezometer

1 Stability Mould 1 Cictran DCP 3.0 software package

for DCP

1 Thermostatically controlled

Standard Water Bath to 60

deg. C

5 Settlement gauges

1 Refusal compaction

equipment BS 594

(Vibratory hammer)

2 Timing Device

1 Gyratory compaction

equipment full set including

spares

1 ¾” Sample Splitter

Miscellaneous

No Item No Item

1 2” Sample Splitter 1 Mechanical Sieve Shaker

20 Laboratory Thermometer 2 English Ruler

6 Armoured Thermometer 2 Metric Ruler


12 | P a g e

10 Pair - Asbestos Gloves 2 Large Log Book

10 Pair - Rubber Gloves 2 Pencil Sharpener

Sample Bags (number of

bags to be

2 6” Protractor

supplied as required) 1 Assorted French Curve Set

1 Trowel, Triangular blade 2 Claw Hammer

2 Deep Cement Pans, 18” X

18” X 3”

2 Hammer for Pull up Nails

1 Concrete Test Hammer 3 Dish Glass

1 Chloride, Alkalinity and 3 6” X 6” Ground Plate Glass

Water Hardness, Set 2 Assorted Screwdrivers (Set)

1 Extra 200,000 lb 12”

Capacity Gauge

6 Fire Extinguisher (Dry Type)

1 Gas or Kerosene - 3 Burner

Stove

6 Flash Light and Battery (Good

Quality)

3 Pocket Calculators,

Scientific

6 15” Clip Board

2 Type 30° and 45° - 12”

Triangle, Set

6 Cross Section Paper Pad

2 Type 30° and 45° - 6”

Triangle, Set

6 Table Brush

2 Rapidograph Lettering Set 1 10cm Coring Machine with set of

extra bits

2 Set English Lettering

Template (Plastic)

2 Vacuum Pump

12 Pocket Type Thermometers

25 - 125 F’, Set

12 Vacuum Pycnometers Plastic Tubing

for Vacuum Line, meter

2 200mm lid 3 Laboratory Tongs

2 200mm receiver 2 Vernier Caliper

2 300mm lid 3 Brass or Copper Brush

2 300mm receiver 3 Nailbrush (hard bristle)

2 Sieve, 75 mm, 300 mm

diam.

3 Point Brush 20-50 mm

2 Sieve, 63 mm, 300 mm diam 1 Point Brush 5-10 mm


diam.

1 Trolley

2 Sieve, 37.5 mm, 300 mm

diam.

3 Refuse Bin


diam.

1 Rain Gauge


diam.

3 Shovel


diam.

3 Spade


diam.

3 Steel hammer, 2 Kg

2 Sieve, 6.3 mm, 300 mm

diam.

1 Water Still

2 Sieve, 5 mm, 300 mm diam. 1 Rapid Moisture Apparatus, Set


13 | P a g e

2 Sieve, 4 mm, 300 mm diam. 2 Mobile weighbridge.

2 Sieve, 3.35 mm, 300 mm

diam. Consumables

2 Sieve, 2.36 mm, 300 mm

diam. No. Item

2 Sieve, 2.0 mm, 200 mm

diam.

100 Cooking gas in 15 kg cylinders

2 Sieve, 1.18 mm, 200 mm

diam.

400 Gunny sacks

2 Sieve, 1 mm, 200 mm diam. 2500 Plastic bag 900 x 450 mm 1000

gauge

2 Sieve, 0.600 mm, 200 mm

diam.

2500 Plastic bag 300 x 450 mm 1000

gauge

2 Sieve, 0.425 mm, 200 mm

diam.

150 Filter paper 150 mm dia. Whatman

No. 5 (packs of 100)

2 Sieve, 0.300 mm, 200 mm

diam.

2 Sieve 0.212mm, 200 mm

diam

20 Filter paper 100 mm dia. Whatman

No. 5 (packs of 100)

2 Sieve, 0.150 mm, 200 mm

diam.

2 Sieve, 0.075 mm, 200 mm

diam.

100 Cotton waste (or drying cloths) kg.

2 Sieve 0.063 mm, 200mm

diam Additional consumables to be

Copies of the latest edition of the following Standard Specifications and publications.

2

Authentic

FIDIC

Copies

FIDIC Conditions of

Contract for EPC/Turnkey

Projects – First Addition

1999

1 Set BS.1924, complete set

1 Set BS.812, complete set 1 Set BS594, complete set

1 Set ASTM’s consolidation of

soils, testing and evaluation.

1 Set BS5835, Part 1.

1 Set BS.882, complete set. 1 Set BS598, complete set

1 Set BS.1377, complete set 1 Set Standard Specification for

Transportation Material and

Methods of Sampling and Testing

(AASHTO) Parts I and II

1 Set AASHTO – Guide for

designing of pavement

structures, Vol. 1 & 2

1 Set ASTM Volumes 04.01, 04.02 and

04.03

1 Set BS. 1881, complete set 1 Set Additional standard as requested

Description Clause Special Condition

Employer’s Personnel Survey Equipment

The Contractor shall provide the following survey equipment for the exclusive use of the

Employer’s Personnel


14 | P a g e

All the survey equipment shall be of a make and quality approved by the Employer and shall

be supplied to the Employer within one month of the Notice to Commence the Works. If not

supplied on time, the Contractor shall hire equipment at his own expense for use by the

Employer as a temporary measure. All the above survey equipment shall revert to the

Employer at the end of the Contract.

Survey Equipment to be provided for the Employer’s Personnel

Item

No. Equipment

Number

to be

Supplied

Remarks and accessories

1 Total Station Leica

TC 1201 or

approved equal

1 No. Plus accessories including on board,

downloading and processing Software, internal

battery and charger with connection cables.

Hard cover carrier case for the Total Station

2 Data Recorder 1 No. With charger unit, including downloading and

data processing software

3 External batteries

and charger

2 No. For the Total Station supplied.

4 Car Charger for

external battery

1 No. Including 4m long cables for connecting to the

12V car battery

5 Digital Level

Instrument

2 No. Plus accessories including tripods, internal and

external batteries and chargers, hard cover

carrier case.

6 Prisms 6 No. Compatible Tilting Super Prisms and carrier

bags

7 Traverse targets 3 No. With adopters for the prism

8 UHF FM 2-way

Portable Radios

2 pairs Plus accessories including batteries and charger

9 Optical Square 3 No. With carrier case

10 Tribrachs 4 No. With optical plumb, circular level bubble and

rotating adaptors

11 Prism Poles 4 No. 3.6m telescopic detail pole with attached bubble

and carrier cases

12 Metal Levelling

Staves - 5m long

4 No. Aluminium 5m-Invar Staves with bubble and

canvas covers

13 Ground plate 2 No. Ground plates for stable positioning of the

levelling staves

14 Tripods 4 No. Compatible adjustable Tripods

15 Vertical Bubbles 6 No. Universal levelling bubble

16 Precision Measuring

Wheel

1 No. Precision measuring wheel with folding grip for

distance measuring in the field. Shockproof

counting mechanism fitted over the measuring


15 | P a g e

Item

No. Equipment

Number

to be

Supplied


wheel.

17 Steel Tape 50m 3 No. Nylon Clad steel open-reel tapes

18 Steel Tape 30m 4 No. Nylon Clad steel open-reel tapes

19 Metal Pocket steel

tapes (5m)

20No.

20 Steel tape repair kit 1No. With carrying case punch and eyeleting tool,

long and short eyelets and assortment of un-

graduated steel tape pieces.

21 Ranging Rods 2.0m

long

18No. 0.5m Red and White coloured point- jointed

rods. Metallic and joinable

22 Pole and staff stand

(holder)

2 No. Tripod like stand capable of holding poles and

staves vertically

23 Collapsible Safety

Traffic Cones

10 No. For road safety

24 Compass 2 No. with a highly resistant case

25 Steel Hammers (4kg

and 2kg)

3 No. 2 No. Sledge hammers 2kg weight and 1No.

4kg sledge hammer

26 Reflective Road

Safety Vests

12 No.

27 Vehicle mountable

Flashing road light

1 No. With adapters and cable

28 Scientific Calculator 4 No.

29 First Aid Kit 2 No. With first aid stuffs

30 Marking Paint 1doz White spray paint in cans(inverted marking

paint)

31 Survey Field Books 50 No. With Hard Cover

32 Marking Chalk To be supplied when required

33 Surveying Umbrella 3 No. Umbrella for protecting of the level from

obstructing light. Large diameter with carrying

bag, dismountable poles and guy ropes.

34 Pangas 6 No. Normal garden pangas or Machete

35 Gum Boots 8 pairs

36 12" Triangular

Architects’ Scale,

Plastic

3 No. Scale to be determined by the Engineer

37 Permanent Markers

Pens and Colour

Roll Flagging tape.

Red and Blue Markers. To be supplied when

required

38 Safety Hard Hat 10No.


16 | P a g e

Item

No. Equipment

Number

to be

Supplied


39 3 metre straight

edge and wedges

3 No

In addition to the above, the following Items shall also be supplied.

Equipment Specification

A set of Dual Frequency

GPS receivers (1 Base

and 2 Rovers) with

accessories and

software, RTK facilities

and accessories.

Onboard, downloading

and processing

Software, internal and

external battery and

chargers with

connection cables. Hard

cover carrier cases

Rapid static (phase) Not more than

Static mode after initialization Horizontal: 5mm + 0.5 ppm

(rms)

Vertical: 10mm + 0.5 ppm

(rms)

Kinematic (phase) Not more than

Moving mode after initialization Horizontal: 10mm + 1 ppm

(rms)

Vertical: 20mm + 1 ppm (rms)

Not more than

Static (phase) with long

observations

Horizontal: 5mm + 0.5 ppm

(rms)


(rms)

Not more than

Static and rapid static (phase) Horizontal: 5mm + 0.5 ppm

(rms)


(rms)

Not more than

Kinematic (phase) Horizontal: 10mm + 1 ppm

(rms)

Vertical: 20mm + 1 ppm (rms)

Facilities for the Employer’s Personnel

(a) General

"Land for the office and laboratory shall be provided by the Employer."

"The design of the office and laboratory shall be as specified in the design drawings; any

alternatives shall be to the Employer’s approval. The office and laboratory may be new

or used subject to their condition being acceptable to the Employer. The Contractor shall

provide equipment and furniture in acceptance these Special Provisions."

"The supply of all potable water to all the facilities to be to World Health Organisation

Standards."

The Contractor shall provide accommodation facilities to the Employer’s personnel.

"The offices, laboratory and installations etc, including all required furniture and

equipment to be provided under this Contract shall be handed over to the Employer in a


17 | P a g e

finished and fully habitable condition not later than 30 days after the Engineer’s Order to

Commence Work and such buildings shall be to the entire satisfaction of the Employer.

Upon completion of the Contract, the office and laboratory if not rented and all furniture,

fixtures and equipment shall revert to the Employer and the Contractor shall clear the site

to the satisfaction of the Employer. All furniture and equipment to be transported to the

facilities of the Employer as instructed by the Employer."

"The power supply to all the facilities of the Employer to be made available 24 hours a

day. Generators should be made available at all the facilities. Emergency lighting to be

supplied at each facility."

Office for the Employer’s Personnel

a) General

"Upon completion of the Contract, the Employer’s Personnel office, buildings, furniture,

equipment, survey instruments, fixtures and services specified herein shall revert to the

Employer. At the end of the Project the Contractor shall be responsible for transportation

of office contents to the facilities of the Employer as directed."

"The Engineer’s office shall have a minimum and internal floor area of 150 m2. The

office shall be completely separate from that of the Contractor shall be fenced with a 2 m

high barbed wire fence and gate, with padlock and chain."

b) Documents

“Original documents of FIDIC Conditions of Contract for EPC/Turnkey Projects, First

Edition 1999, two copies for Employer.”

c) Furniture and Equipment

“All equipment, furniture, fixtures and surveying instruments to be provided as listed in

table 2 with additional attached list and survey instruments to be provided as listed in

table 3 to be approved by the Employer.

Table 3: Furniture and Equipment for Engineer's Office

No. Description Quantity

1. Meeting table, minimum 3.6 m x 1.5 m, with 8 chairs 1

2. Desk, minimum 1.8 m x 0.9 m, with lockable double chest of

drawers

8

3. Desk, minimum 1.5 m x 0.75 m, with lockable single chest of

drawers

10

4. Tables with smooth flat top, minimum 1.8 m x 0.9 m 4

5. Table for printers and scanner, minimum 1.2 m x 0.6 m 3

6. Swivel type sturdy and comfortable desk chairs 18

7. Visitors chairs 10

8. Table lamps 20

9. Waste paper baskets 18


18 | P a g e


10. White board with accessories 6

11. Wall boards 2.4 m x 1.2 m 12

12. Steel filing cabinets, 1300 mm high, 460 mm wide and 600 mm

deep, each fitted with four lockable drawers on runners.

10

13. Steel general purpose lockable cabinets with shelves with at

least 1.5 sq.m. shelf area

10

14. Steel drawing cabinets suitable for storing all Contract

drawings

2

15. Drawing board for A1 drawings including draftsman's stool 1

16. Filing trays 18

17. Desktop with minimum Core i7 or, 3.0 GHz processor or

higher, multiscan 21” SVGA colour monitor (low radiation),

random access memory of min 32 GB, a CD/DVD

reader/writer (min 52xspeed), Network Card 10/100/1000 and a

hard disk with a capacity of 320 Giga bytes. The computer shall

have two serial ports, one parallel port, and four USB ports and

be supplied with a mouse. A voltage regulator and emergency

power interrupt unit (UPS) with 30 minutes duration shall also

be supplied. All of the above is to be supplied to the satisfaction

of the Employer. The tendered amount shall include for the

maintenance of the computers throughout the Contract period.

12

18. Desktop with minimum Core i7 or 3.0 GHz processor or

higher, multiscan 24” SVGA colour monitor (low radiation),

random access memory of min 2GB, a CD/DVD reader/writer

(min 52xspeed), Network Card 10/100/1000 and a hard disk

with a capacity of 320 Giga bytes. The computer shall have two

serial ports, one parallel port, and four USB ports and be

supplied with a mouse. A voltage regulator and emergency

power interrupt unit (UPS) with 30 minutes duration shall also

be supplied. All of the above is to be supplied to the satisfaction

of the Employer. The tendered amount shall include for the

maintenance of the computers throughout the Contract period.

2


19 | P a g e


19 Laptop computer with a 17” XTFT colour screen, an i7 Core

3.0 GHz processor or higher, EISA Bus, IDE controller,

random access memory of min 4GB, a CD/DVD reader/writer

and a hard disk with a capacity of 400 Giga bytes minimum.

The computer shall have one parallel port, four USB ports and

be supplied with a mouse. A separate multiscan 24” SVGA

colour monitor 1024 x 768 resolution, 70 Hz refresh rate, ET

400 graphics card and a 201 keyboard shall also be provided

with necessary adaptor cable. The tendered amount shall

include for the maintenance of the computers throughout the

Contract period.

All desktop and laptop computers shall be supplied with the

latest version of the following fully licensed software:

Windows 7 Professional or later version

MS Office 2010 or later version

Approved virus detection software with update support

Latest version of MS Project for Windows

4

20 Laser printer with speed of 15 pages per minute and a

resolution of 1200x1200 DPI having carriage for up to A3

paper, plus stationery for the duration of the Contract.

2

21 Desk top hard drive for data storage with capacity up to 500

Gb, including USB connections

10

22 Photocopier with copy size up to A3, capable of reducing or

enlarging between A3 and A4, plus paper and other supplies for

the duration of the Contract.

1

23 A4 size laser colour printer 1

24 Facsimile transmitting machine (approved by the Engineer) 1

26 Scanner resolution 2400 DPI size A4 or similar approved by

the Engineer

2

27 Electronic calculators 12

28 Handheld GPS (Garmin GPSMAP 76C) or equivalent 3

29 Digital camera, min. 10.0 mega pixels and minimum 2

number 2 GB memory card

6

30 Binding machine 1

31 Paper punches 12

33 Paper staplers 12

34 Rain gauges 3

35 Thermometer (max/min) 2

36 First aid and snake bit kit 2

37 Fire extinguishers (dry type) 8


20 | P a g e


38 Ceiling fans or portable fans as agreed with the Engineer 9

39 Air conditioners, 12,000 BTU/hr 9

40 Safe, min. size approx. 0.8 m x 0.5 m x 0.4 m, to be concreted

in place (either wall or floor mounted) complete with lock and

keys.

1

41 Refrigerator (minimum 120 litres) 1

42 Twin hot plates 1

43 Electric kettle 2

44 Water filters 2

45 Thermos jugs, 4.5 litres capacity 18

46 Set of plates, cups and glasses for 36 persons plus cutlery 1


21 | P a g e

Accommodation for the Employer’s Personnel

(a) General

The Contractor shall provide accommodation by renting the houses described below for

the entire Contract duration of the Contract for use by the Employer’s site personnel.

Upon completion of the Contract, furniture, equipment and fixtures as specified in the

design drawings and in Table 1 shall revert to the Contractor. All furniture, equipment

and fixtures to be transported to the facilities of the Employer as instructed."

(b) Upon completion of the Contract, the houses listed below shall revert to the Contractor ".

“The Type I house shall be furnished and equipped and in addition shall at least have

three bedrooms, two bathrooms (one en-suite), kitchen, dining room, living room and

store room/lock-up garage.”

“The Type II house shall be furnished and equipped and in addition shall at least have two

bedrooms, two bathrooms (one en-suite), kitchen, dining room, living room and store

room/lock-up garage.”

“The Type III house shall be furnished and equipped and in addition shall at least have

two bedrooms, one bathroom, kitchen, dining room, living room and store room.”

“The Type IV and V house shall be furnished and equipped and in addition shall at least

have one bedroom, one bathroom, kitchen, living room.”

Housing Units

House Type Number

I 4

II 5

III 5

IV 10

V 10


22 | P a g e

Furniture requirements for senior and junior staff houses

Description No. for each house unit

House Type I&II House Type III House

Type IV

House

Type

V

Double bed with mattress 1 1 Nil Nil

Single bed with mattress 2 2 2 2

Dining table 0.90 m by 1.5

m

1 1 2 2

Carver chairs 2 2 Nil Nil

Settee 1 1 Nil Nil

Dining chairs 6 4 4 4

Bedroom chairs 4 2 Nil Nil

Arm chairs with cushions 4 Nil Nil Nil

Dressing table with mirror

and stool

1 1 Nil Nil

Bathroom stool 1 1 Nil Nil

Cupboard (hanging and

shelved)

2 1 2 2

Desk ( 8 drawers) and

chair

1 1 Nil Nil


23 | P a g e

Coffee table 2 1 Nil Nil

Occasional table 2 1 Nil Nil

Book case 2 1 Nil Nil

Kitchen table 1 1 2 2

Side board 1 1 Nil Nil

Kitchen chairs 2 1 Nil Nil

Chest of drawers 2 1 Nil Nil

Table lamp 1 1 Nil Nil

Set of sheets for double

bed

2 1 Nil Nil

Set of sheets for single

bed

4 2 Nil Nil

Dinner service (set) 1 1 Nil Nil

Set of cutlery 1 1 Nil Nil

Set of pots and pans 1 1 Nil Nil

Set of kitchen utensils 1 1 Nil Nil

Table cloth 2 1 Nil Nil

Set of house cleaning

utensils

1 1 Nil Nil

Electric or gas cooker with

3 plates and oven

1 1 Nil Nil


24 | P a g e

Waste paper basket 4 2 2 2

Dustbin 1 1 2 2

Refrigerator with freezer

capacity 180 litres

1 1 Nil Nil

Gas or electric hot water

for kitchen and bathroom

1 1 Nil Nil

2 Kw Air conditioners 3 2 Nil Nil

Washing machine 1 1 Nil Nil

Table fans 4 2 Nil Nil

Carpets 2.0m x 1.0m 3 Nil Nil Nil

Carpet 3.0m x 4.0m 1 Nil Nil Nil

Curtains to all windows YES YES YES NO


25 | P a g e

Description Clause No Special Condition

Attendance upon the Engineer

and His Staff,

137 The following junior staffs required for

attendance to the Employer’s Personnel are

as listed below and shall be paid salaries,

allowances by the Contractor at prevailing

market rates.

Table 1.3: Staff for attendance upon the Employer’s Personnel

Staff description Number required Staff description Number

required

Assistant Resident Engineer 1 Survey Assistant 3

Inspector of Works 6 Draughtsman 1

Laboratory Technician 1 Levellers 6

Assistant Laboratory

Technician

3 Chain man 12

Laboratory Attendant 12 Office

Administrator

1

Secretary 1 General Clerk 1

Tea Girl/Office Attendant 1 Garden

Attendance

5

Office Messenger 1 House Attendant 4


26 | P a g e

Provision of vehicles, Clause 138

The Contractor shall provide fuel and maintain in good working conditions, with drivers all

the vehicles specified below.

All vehicles to be supplied by the Contractor shall be brand new, right hand drive, diesel

powered and fitted with air-conditioner and power steering as described below.

2 No. Type 1: Minimum 2.8 -litre 4-wheel drive, or equivalent approved, 5 door Sports

Utility Vehicle or similar approved, fitted with air bags, mobile telephone hands-free headset

and 2-way radio.

3 No. Type 2: Minimum 2.8 -litre 4-wheel drive, or equivalent approved, twin-cab pick-up,

fitted with mobile telephone hands-free headset and 2-way radio. .

2 No. Type 3: Minimum 2.7 -litre 4-wheel drive, or equivalent approved, single cab pick-up

(with canvas back and seat), fitted with mobile telephone hands-free headset and 2-way radio.

A minimum of 1 No. of either Type of vehicles above shall be for the Employer’s use on the

project and will be supplied and maintained by the Contractor throughout the Operations

Service Period. Payment will be made as for the vehicles to be supplied during the Design-

Build period.

The Contractor shall replace any vehicle by a similar new vehicle after it has completed

150,000Km.

Ownership of these vehicles will revert to the Contractor upon completion of the Contract.

Section 2: Materials and Testing of materials

Soils and gravels, Clause 205

Whenever in the Contract Documents, a minimum California Bearing Ratio (CBR) is

specified, the CBR of the material shall be at the specified degree of compaction after four

days of soaking in the case of virgin materials and after seven days curing plus seven days

soak in the case of cement or lime improved materials.

Bituminous binders, Clause 211

The ash content of penetration grade bitumen shall not exceed 0.5% by weight.

Setting out, Clause 301

Detailed setting out


27 | P a g e

Reference pegs shall be 50mm x 50mm in section, 600mm long driven 400 mm firmly into

ground and painted white above ground level. The offset from the centreline shall be

indicated by a small nail 20-25mm long with its head driven flush with the top of the peg.

Chainage, offset and reference elevation shall be clearly indicated on the sides of the peg to

the satisfaction of the Employer.

Site Clearance, Clause 401

Add the following as the last paragraph in Sub-clause (a):

The Contractor shall take care not to uproot or damage trees which are within the road

reserve but outside the construction width. After the Contractor has staked out the extent of

the road, the Employer, with the assistance of the Contractor, shall mark out the trees to be

removed. After removal, the trunks and branches of these trees shall be cut up into pieces

not more than 2.0 m in length, transported and neatly stored at the nearest Ministry of Roads

and Works camp at a position to be indicated by the Employer.

Section 5:Earthworks

Mass haul diagram, Clause 509,

No mass haul diagram has been provided with the Contract documents. The Contractor

shall locate suitable materials for constructing earthworks along the alignment and

elsewhere.

Borrow pits, Clause 511

“Fill material which is required in addition to that provided by excavation shall be obtained

from borrow pits to be located and provided by the Contractor but to the approval of the

Employer.”

Section 6: Quarries, Borrow Pits, Stockpile and Spoil Areas

General, Subclause 601

The Employer will not make available to the Contractor any land for quarries, borrow pits,

stockpile and spoil areas, except for those in the road reserves and specifically approved by

him.

The Contractor will be entirely responsible for locating and proving suitable sources of

materials complying with the Standard and Special specifications and for procurement,

winning, haulage to site of these materials, rehabilitating the borrow pits, quarries, stockpile

and spoil areas, and all costs involved therein. Similarly the Contractor will be responsible

for provision of areas for stockpiling materials and disposal of spoil, as well as the costs

thereof. Should there be suitable areas for spoil dumps or stockpiling within the road

reserve, the Contractor may utilise them, subject to the approval of the Employer.


28 | P a g e

No additional payment will be made to the Contractor to cover costs arising from the

requirements of this clause. The Contractor shall include the costs of complying with this

clause in the rates.

Section 7: Excavation and Fill for Structures

Description Clause Special Specification

Excavation

for River

Training

and new

watercourse

709

Add the following:

“For culvert widening the Contractor shall inspect the structures to

be widened and allow for any river training Works he deems

necessary in his rates for excavation.”

Stone

pitching

710

Add the following

All stone for pitching shall be capable of withstanding a crushing

stress of 20 N/mm² when soaked. The source of stone shall be free

from overburden, mudstone, cracks, sand holes, veins, laminations

or other imperfections as may be identified by the Employer

during the approval process.

Section 8: Culvert and Drainage Works

Bedding and

laying of pipe

culverts

809

Delete “round pipe culverts should normally be placed in the in

situ material directly”，and replace with "Usually the round

pipe culverts placed on the bottom of the ground not less than

100mm of macadam cushion" instead.

Minor

drainage

structures

816 Replace UF1 with F1


29 | P a g e

Appendix A:

Other Design Data

(To be provided to all bidders)


30 | P a g e

Appendix B: Other Design Data

The following data, will be provided by the client to all bidders within a period of one month

from the date of issue of bidding documents for information purposes only. Bidders should

however further appraise themselves of the project conditions through appropriate means to aid

in the preparation of their bids.

MOWT design manuals and specifications.

Traffic and axle load Data for the project road

Topographical survey report

Land Acquisition Management system

NaMATA Standard Special Specification Revision O (this should be read in conjunction

with the Ministry of Works and Transport General Specifications for Roads and Bridge

Works)