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KERALA WATER AUTHORITY

KIIFB- AUGMENTATION OF WSS TO KOLLAM

CORPORATION PHASE II- PACKAGE II-

CONSTRUCTION OF 20LL OHSR AT VASOORICHIRA

TENDER NO.06/2018-19/SE/Q

DUE DATE :18-06-2018 at 3.00 pm

NOTICE INVITING TENDER

VOLUME II

SCOPE OF WORK

OFFICE OF THE SUPERINTENDING ENGINEER

KERALA WATER AUTHORITY

JALABHAVAN, KOLLAM

KERALA STATE

TELE .0474 – 2745293

Tenderer Superintending Engineer

CONTENTS

Page No.

1. General information -

2. Scope of the Tender -

3. Detailed Scope of Tender -

4. General Specification & Requirement -

5. Vendors List -

6. Additional Information -

7. Maintenance -

8. Assessment Cost of work -

9. Implementation schedule -

10. Clarifications -

11. Corrections and Nodifications -

12.. Annexures -

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KERALA WATER AUTHORITY

KIIFB- AUGMENTATION OF WSS TO KOLLAM

CORPORATION PHASE II- PACKAGE II-

CONSTRUCTION OF 20LL OHSR AT VASOORICHIRA

SCOPE OF WORK

1. GENERAL INFORMATION

Kollam is a coastal city on the banks of Ashtamudi Lake that took the title God's

Own Country without much doubt. The city lies about 71 kilometers north of the state

capital, Thiruvananthapuram. The city hosts the administrative offices of Kollam

district and is a prominent trading city for the state. It is connected to all the important

towns in Kerala both by roads and railways.

Kollam town is provided with water supply from Sasthaamcottah lake, a fresh water

lake, situated about 26 Km away from Kollam city. Supply of water from this scheme is

limited due to shortage of water in Sasthamcottah Lake. Hence it is proposed to

augment the scheme with source as Kallada River. The scheme is proposed to be

implemented in three phases. Phase– I is sanctioned under AMRUT and Phase –II under

KIIFB. Phase - III will be taken up later.

2. SCOPE OF THE TENDER

Scope of the tender covers the following components and auxiliaries.

2.1 Design & Construction of 20 LL Capacity OHSR at Vasoorichira.

2.2 Maintaining the components supplied, installed and constructed as part of this

contract during the maintenance period from the date of commissioning of the

scheme in a satisfactory manner acceptable to the Executive Engineer, in

accordance with clause 8.24 of Volume 1.

2.3 Handing over all the components supplied, installed and constructed under this

contract to Kerala Water Authority with necessary documents and list of items after

completing the works, in accordance with clause 8.26 of Volume 1.

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3 DETAILED SCOPE OF TENDER

Detailed scope of the work is as follows

3.1 Design of the OHSR considering the specific site conditions, soil investigation report

and design requirements.

3.2 Construction of the OHSR as per the approved design and requirements mentioned

in this scope of work.

3.3 The Over Head tank at Vasoorichira shall be rectangular in shape of capacity 20

Lakh litres. The out let level and inlet level of the service reservoir shall be +23.960m

& + 27.560 m respectively. The average ground level at site is +3.630m.

3.4 The tank shall be provided with the following pipe specials, valves etc.

a. 500 mm CI wall casting pipes for outlet

b. 2 Nos. of 350mm CI wall casting pipes for inlet & overflow

c. 1 No. 350mm CI wall casting pipes for scour arrangements

d.1 No. 500mm CI DF sluice valve (class II) for outlet

e. 1 No. 200 mm CI DF sluice valve (class II) for scour

f. 350mm DI Double flanged pipes of sufficient length shall be connected for inlet and

overflow arrangements.

g. 500mm DI Double flanged pipes of sufficient length shall be connected for outlet

arrangements.

h. 200mm CI Double flanged pipes of sufficient length shall be connected for scour

arrangements.

i. CI duck foot bends with proper anchoring should be provided at the ground level

of each vertical connection.

j. DI/CI vertical connection pipes and exposed portion of pipe specials shall be

painted with suitable paint of approved quality and color.

3.5 It is proposed to utilize the bottom portion of the OHSR in ground floor and 1st floor

as staff quarters/store/office. Slabs shall be provided at 1st & 2nd brace levels

suitably designed so that the space can be utilized for the above purpose.

Foundation, columns, Braces, slabs etc. shall be designed considering the probable

load due to the weight of partition walls and live loads on slabs as per standard

specification.

3.6 The site shall be leveled properly. 1 No. of suitably designed RCC stair case of

minimum width 0.90m shall be provided to facilitate movement of men and

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materials from ground to floor level of the reservoir. Two Nos.M.S. Ladder 50cm

inside spacing using 50 X 12mm M.S.flats and 2 Nos 16mm MS Rods welded to the

stringers at 30cm c/c shall be provided for stepping from floor slab to roof slab. 1

No. MS ladder shall be provided for inside of the tank. Balcony slab of minimum 1.0m

width and 12cm thickness shall be provided around the reservoir.

3.7 Minimum 34 Nos. 100mm C.I S&S, Slotted Vent Cowl (Terminal Guard with

mosquito net and 4 Nos. – Rectangular CI manhole cover 455x610 mm with frame

(low duty) shall be provided.

3.8 Hand rails using 25mm GI class B pipes @1m C/C as verticals, 25mm GI Class B pipes

@ 0.50m as horizontals and each vertical post immersed in cement concrete shall be

provided around roof slab and balcony slab and the hand rail shall be painted with

approved steel primer and aluminum paint two coats. Stainless steel hand rails

approved by the Engineer – in- charge shall be provided around the stair slab

wherever necessary.

3.9 The OHSR shall be tested before plastering for its water tightness by filling with

water supplied by the contractor.

3.10 All the design shall be in accordance with IS 456:2000, IS 3370 (Part II) - 2009 with

latest amendments. Levelling course with M15 shall be provided below column

footing. Concrete Mix not leaner than M25 for piles, pile caps, column footings,

columns, braces and floor beams, and M30 for floor slab, balcony, side wall, column

inside tank, roof beam and cover slab shall be used. If pile foundation is proposed,

method of piling is to be specifically mentioned in the design. If strip footing or other

foundations are proposed, the way of execution is to be specifically mentioned in the

design. Earth quake resistant design is to be followed. High yield strength deformed

bars or tor steel bars as per NIT shall be used as reinforcement. Plastering shall be

in cement mortar 1:3, 12mm thick 1 coat for all exposed surfaces. Inside the

reservoir shall be plastered with cement mortar 1:3, 12mm thick 2 coat including

flushing coat with 2% water proofing compound.

3.11 A minimum free board of 15 cm below the bottom of the roof beam shall be

provided.

3.12 Soil investigation details are attached with the NIT for reference. If necessary the

contractor has to carry out his own soil study for design and construction. The

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design shall be got approved by the Design wing of Kerala Water Authority

(WASCON) before construction work is started.

3.13 The site for OHSR is the WTP site at Vasoorichira. The land is marshy and piling is

proposed as foundation for WTP components and OHSR. However the foundation

shall be finalized and approved as per clause 2.2.12 above.

3.14 The access to the tank site shall be formed suitably by cutting or filling earth as per

site requirements for enabling the conveyance of materials. Painting exterior walls

with two or more coats of Acrylic Smooth exterior paint of required shade including

priming coat of exterior primer applied @ 2.20 kg/ 10 sqm) as directed shall be

done.

3.15 Painting letters or figures of approved size (Block, Roman, Italic/Indian) 30.00cm

height with black Japan paint of approved brand and manufacture etc as per

direction. (KERALA WATER AUTHORITY - KIIFB 2016-17 - AUGMENTATION OF

WSS TO KOLLAM CORPORATION- PHASE -II – 20 LAKH LITRES OHSR-

VASOORICHIRA) as directed by the departmental officers shall be done.

3.16 All steel work including GI hand rails shall be painted with Deluxe Multi Surface

Paint two or more coat applied @ 0.90 ltr/10 sqm over an under coat of primer

applied @ 0.80 ltr/10 sqm of approved brand and manufacturer to give an even

shade as approved by the Engineer in charge.

3.17 Suitable capacity lightning arrestors as approved by the engineer in charge shall be

provided at suitable location.

3.18 Properly designed water level indicator as approved by the Engineer in charge for

easily identifying the water level in the tank at any time shall be provided.

3.19 2 Nos. RCC valve chambers of inside size 2.0mx1.50m and 1.50m height with

bottom leveling course shall be provided.

3.20 A common chamber of suitable size to collect the wash water and overflow from

the OHSR shall be provided in the compound and the water collected in this chamber

shall be conveyed to the “waste water recycling unit constructed as part of 100 MLD

WTP” by laying 160mm or higher dia. uPVC pipe with pressure rating 6 kg/cm2 of

sufficient length. (If the waste water recycling unit is not constructed even at the end

period of this work, the pipe should be laid near to the location of “waste water

recycling unit as per approved layout of WTP and connected components”.

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3.21 The approved layout of TP and other components will be furnished to the

contractor and the contractor shall accept the location of the OHSR in the approved

layout. Soil investigation is to be carried out by the contractor at this location before

submitting the design. If pile foundation is proposed and approved for the OHSR,

piling works are to be completed before starting the work of superstructure of the

TP components in the compound. The contractor shall wait for completion of piling

works of TP components to start the super structure of OHSR. The selected

contractor shall submit proposed time schedule for execution and the same will be

approved by the Executive Engineer considering the time schedule for execution of

the TP components. Both contractors shall work in harmony to safeguard the

interest of the department and their own. Disputes if any with the contractor of TP

shall be informed in writing to the Executive Engineer and the decision of the

Executive Engineer or higher authority shall be accepted.

3.22 Land scaping shall be done at the OHSR premise as directed by the Engineer in

charge

Any further requirements related to the construction work if directed by

concerned Engineers have to be met with. All technical specifications as per NIT

have to be fully satisfied. All the design shall be in accordance with IS 456:2000, IS

3370 (Part II) - 2009 with latest amendments. Soil investigation details are attached

with the NIT for reference. If necessary the contractor has to carry out his own soil

study for design and construction. The design shall be got approved by the Design

wing of Kerala Water Authority (WASCON) before construction work is started. The

access to the tank sites shall be formed suitably if necessary as per site

requirements. Minimum M 30 mix has to be used for reinforced concrete water

retaining portions of all structures. Other reinforced concrete components shall be

with minimum M25 design mix. Excavation is to be carried out through all classes

of soil including rock if any up to the required level. If pile foundation is necessary,

the same has to be carried out by the contractor as per approved design and

recommendations of design approving authority.

4 GENERAL SPECIFICATIONS AND REQUIREMENT

These Specifications cover the items of work in structural and non-structural

parts of the Works coming under purview of this document. All work shall be

carried out in conformation with this unless specified otherwise. In general,

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provisions of Indian Standards, Indian Roads Congress Codes, MORTH

Specifications for Roads and Bridge Works (III Revision) and other national

standards have been followed. These Specifications are not intended to cover the

minute details. The work shall be executed in accordance with best modern

practices. All codes and standards referred to in these Specifications shall be the latest

edition including all applicable Official Amendments and revisions thereof.

4.1 Storage of materials:

The conveyance, unloading and stacking of materials procured for the project will

be the responsibility of the tenderer. Authority takes no responsibility for

providing material stack yard. Tenderer will not be allowed to stack the materials

on road side in such a way to causes hindrance to normal traffic.

4.2 Safety at site:

Tenderers alone shall be responsible for any damage to men and materials and that

may occur at site due to lapses in safety measures. During night hours, contractors

shall provide sufficient lighting and watching at the site. Failure to adhere to these

clauses shall attract fine and penalties by way of deductions from the payments to

contractors at an amount worked out at department rates.

4.3 Approval of Materials

4.3.1 Approval of all sources of material for Works shall be obtained in writing

from the Executive Engineer before their use on the project. The contractor shall

verify that the entire quantity required for the work could be obtained from the

approved locations from where material is to be taken. Any extra lead, in the

eventuality of material not being available at the said locations, will not be allowed,

should be locations subsequently approved be located at a distance involving more

lead.

4.3.2 Where the terms crushed gravel/shingle, crushed stone, broken stone or

stone aggregate appear in any part of the Tender Documents for work, they refer to

crushed gravel /crushed shingle / crushed stone aggregate obtained from an

integrated crushing plant having appropriate primary crusher, secondary crusher and

vibratory screen.

4.3.3 Raw and processed samples of the mineral aggregates from the approved

quarry shall be submitted by the Contractor at no extra cost.

4.4 Use of equipment of work

The following conditions regarding use of equipment’s on works shall be followed

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4.4.1 The Contractor shall be required to give a trial run of the equipment(s) or

establishing their capability to achieve the required Specifications and tolerance to the

satisfaction of the Engineer before commencement of the work.

4.4.2 All equipment’s provided shall be proven efficiency and shall be operated

and maintained at all times in a manner acceptable to the Engineer.

4.4.3 No equipment or personnel will be removed from site without permission of

Engineer.

4.5 Quality Control on Works and Materials

4.5.1 The Contractor shall be responsible for the quality of the work in the entire

construction work within the contract. He shall, therefore, have his own independent

and adequate set-up for ensuring the same.

4.5.2 The Engineer shall inspect the work from time to time during and after

execution of work and ascertain the quality of the work tested (by himself, by his

Testing and Quality Control Units or by any other agency deemed fit by him) generally

as per the requirements of the CPHE EO Manual. Additional tests may also be

conducted where, in the opinion of the Engineer, need for such tests exist.

4.5.3 The Contractor shall provide necessary cooperation and assistance in

obtaining the samples for tests and carrying out the field tests as required by the

Engineer from time to time.

4.5.4 The Contractor shall carry out modification in procedure of work, if any, as

directed by the Engineer in charge during inspection.

4.5.5 Works falling short of quality as per tests indicated in Clause 4.5.3 above

shall be rectified by the Contractor as directed by the Engineer at his own cost.

4.5.6 For testing of samples of soil, soil mix, granular material and mix, bituminous

mix, aggregates, cores etc. Samples in the required quantity and form shall be supplied

to the Engineer in charge by the Contractor at his own cost.

4.5.7 For cement, bitumen and similar other materials where essential tests are to

be carried out at the manufacturer’s plants or at laboratories approved by the

Executive Engineer other than the site laboratory, the cost of samples, sampling,

testing and furnishing of test certificates shall be borne by the Contractor. He shall also

furnish the test certificates to the Executive Engineer.

4.5.8 For testing of cement concrete at site during construction, arrangement for

supply of samples, shall be made by the Contractor as per the frequency and number

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of tests specified in the Handbook of Quality Control for Construction of roads and

runways, IRC Special Publication No. 11, and relevant IS codes or relevant Clauses

(1702, 1704, 1707, 1717 etc.,) as specified for in MORTH Specifications for Roads and

Bridge Works (III Revision).

4.5.9 The method of sampling and testing of materials shall be as required by the

IS Standards. In the absence of relevant Indian Standards, the sampling and testing

procedure to be used shall be as approved by the Executive Engineer.

4.5.10 Where the Executive Engineer considers that in the interest of the control of

the quality on materials or workmanship, modifications, if any, are necessary, such

modifications shall be carried out by the Contractor at no extra cost.

4.5.11. The carriage and stacking of materials shall be done as directed by the

Engineer in charge. Any tools and plants required for the work shall be arranged by

the Contractor.

4.5.12. Responsibility for Loss or Damage - Loading, carriage, unloading and

stacking shall be done carefully to avoid loss or damage to the materials. In case of any

loss or damage, recovery shall be affected from the Contractor at twice the

departmental issue rates of the materials. If the departmental issue rates of the

materials are not available then the recovery shall be affected at twice the prevailing

market rates as determined by the Executive Engineer.

4.6 Carriage of Materials

The carriage and stacking of materials shall be done as directed by the Engineer in

charge. Any tools and plants required for the work shall be arranged by the

Contractor.

4.6.1 Responsibility for Loss or Damage

Loading, carriage, unloading and stacking shall be done carefully to avoid loss or

damage to the materials. In case of any loss or damage, recovery shall be affected from

the Contractor at twice the departmental issue rates of the materials. If the

departmental issue rates of the materials are not available then the recovery shall be

affected at twice the prevailing market rates as determined by the Executive Engineer.

4.6.2 Mode of Carriage

Depending upon the feasibility and economy, the Engineer in charge shall

determine the mode of carriage viz. whether by mechanical or animal transport or

manual labour.

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4.6.3 Stacking, Covering and Protection

4.6.3.1 Material shall be stacked in such a manner as to ensure the preservation of

their quality and fineness for the work. Different types of materials shall be stacked

separately and in such a way that counting and measurements can be done without

disturbing the stacks. Any material that is liable to be affected by rain or other

adverse weather conditions shall be covered and protected against the same.

4.6.3.2 Earth, dismantled materials, malba and other similar materials shall be

stacked as directed by the Engineer in charge.

4.6.3.3 Cement bags, steel bars, structural steel sections, bricks and timber

and other similar materials shall be stacked in regular tiers.

4.6.3.4 Pipes of RCC, DI, PVC, GI, CI, MS etc. shall be stacked in rows.

4.6.3.5 Lime stone, metal, sand and such similar materials shall be stacked as

directed by the Engineer in charge.

4.6.4 Measurements

Length, breadth and height of stacks shall be measured correct to 1(one) cm. The

quantity shall be worked out in cubic meter correct to two places of decimal. The

volume of stacks shall be reduced by percentages as shown against each for looseness

in stacking to arrive at the net quantity for payment. No reduction shall be made in

respect of articles or materials for which mode of payment is by length or weight or

number.

4.7 Earthwork, Erosion Control and Drainage

Earth work excavation shall cover all classes of soil including hard rock, in

accordance with the requirements of lines, grades and cross sections. Hard rock

requiring blasting but where blasting is prohibited for any reason shall be excavated

by chiseling, wedging or any other agreed method.

4.8 Slips and Slides

If slips, slides, over-breaks or subsidence occur in cuttings during the

process of construction, they shall be removed at the cost of the Contractor as ordered

by the Engineer- in- charge. If slips occur, the slipped material shall be removed and

dressed to a modified stable slope. Removal of the slipped earth will not be paid for if

the slips are due to the negligence of Contractor. Adequate precautions shall be taken

to ensure that during construction, the slopes are not rendered unstable or give rise to

recurrent slides after construction. If finished slopes slide into the roadway

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subsequently, such slides shall be removed and paid for at the Contract rate for the

class of excavation involved, provided the slides are not due to any negligence on the

part of the Contractor. The classification of the debris material from the slips, slides

etc., shall conform to its condition at the time of removal and payment made

accordingly regardless of its condition earlier.

4.9 Dewatering

If water is met within the excavations due to springs, seepage, rain or other causes,

it shall be removed by suitable diversions, pumping or bailing out and the excavation

kept dry whenever so required or directed by the Engineer- in- charge. Care shall be

taken to discharge the drained water into suitable outlet as not to cause damage to the

works, crops or any other property. Due to any negligence on the part of the

Contractor, if any such damage is caused, it shall be the sole responsibility of the

Contractor to repair / restore to the original condition at his own cost or compensate

for the damage. Sumps made for dewatering must be kept clear of the excavations /

trenches required for further work. Method of pumping shall be approved by

Engineer; but in any case, the pumping arrangement shall be such that there shall be

no movement of subsoil or blowing in due to differential head of water during

pumping. Pumping arrangements shall be adequate to ensure no delays in

construction.

4.10 Filling, Backfilling

All fill material will be subject to Engineer's approval. If any material is rejected by

Engineer- in- charge, Contractor shall remove the same forthwith from the site at no

extra cost. Surplus fill material shall be deposited / disposed off as directed by

Engineer- in- charge after the fill work is completed. No Quarry dust/earth fill shall

commence until surface water discharges and streams have been properly

intercepted or otherwise dealt with as directed by Engineer- in- charge.

The Backfilling should be done with Red Earth / Quarry dust wherever necessary.

Fill material shall be free from clods, salts, sulphates, and organic or other foreign

material. If any selected fill material is required to be borrowed, Contractor shall

make arrangements for bringing such material from outside borrow pits. The

material and source shall be subject to prior approval of Engineer- in- charge. The

approved borrow pit area shall be cleared of all bushes, roots of trees, plants, rubbish

etc. top soil containing salts / sulphate and other foreign material shall be removed.

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The materials so removed shall be burnt or disposed off as directed by Engineer.

Contractor shall make necessary access roads to borrow areas and maintain the

same, if such access road does not exist, at his cost.

4.11 General site grading

1. Site grading shall be carried out as insisted by the Engineer- in- charge.

Excavation shall be carried out as specified in the Specification. Filling and

compaction shall be carried out as specified.

2. If no compaction is called for, the fill may be deposited to the full height in one

operation and leveled. If the fill has to be compacted, it shall be placed in layers not

exceeding 225 mm and leveled uniformly and compacted.

3. To ensure that the fill has been compacted as specified, field and laboratory tests

shall be carried out by Contractor at his cost.

4. Field compaction test shall be carried out at different stages of filling and also

after the fill to the entire height has been completed. This shall hold good for

embankments as well.

5. Contractor shall protect the earth fill from being washed away by rain or

damaged in any other way. If any slip occurs, Contractor shall remove the affected

material and make good the slip at his cost.

6. The fill shall be carried out to such dimensions and levels as indicated on the

Drawings after the stipulated compaction. The fill will be considered as incomplete

if the desired compaction has not been obtained.

8. If so specified, the rock as obtained from excavation may be used for filling and

leveling to indicate grades without further breaking. In such an event, filling shall be

done in layers not exceeding 500 mm, approximately. After rock filling to the

approximate level, as indicated above has been carried out, the void in the rocks

shall be filled with finer materials such as sand, broken stone, etc. and the area

flooded so that the finer materials fill up the voids. Care shall be taken to ensure

that the finer fill material does not get washed out. Over the layer so filled, a 100

mm thick mixed layer of broken material and earth shall be laid and consolidation

carried out by a 12 tonne roller. No less than twelve passes of the roller shall be

accepted before subsequent similar operations are taken up.

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4.12 Fill density

The compaction, only where so called for, in the schedule of quantities / items shall

comply with the specified (Proctor / Modified Proctor) density at moisture content

differing not more than 4 percent from the optimum moisture content. Contractor

shall demonstrate adequately at his cost, by field and laboratory tests that the

specified density has been obtained.

4.13 Inclusive documents

The provisions of special conditions of contract, those specified on the tender as

well as execution Drawings and notes or other Specifications issued in writing by

the Engineer shall form part of these Specifications.

4.14 Order of precedence, clarifications and interpretation

When the various Specifications and codes referred to in preceding portion are at

variance with these Specifications and with each other, the following order of

precedence will generally be accepted.

1. Written instructions of the Executive Engineer.

2. Special Conditions of Contract, Special specifications Item wise Technical

Specifications, if provided, and Execution Drawings.

3. Provisions of Standard Specifications.

4. I.S. Codes.

5. IRC Codes, MORTH Specifications, etc.

6.The Manual on Water Supply and Treatment and the Manual on Sewerage and

Sewage Treatment issued by CPHEEO, Ministry of Urban Development, New Delhi.

7. The attention of the Contractor is drawn to those Clauses of IS codes which

require either Specification by Executive Engineer or the mutual agreement

between the supplier and purchaser. In such cases it is the responsibility of the

Contractor to seek clarification on any uncertainty and obtain prior approval of

the Executive Engineer before taking up the supply/construction.

4.15 Unacceptable work

All defective Works are liable to be demolished, rebuilt and defective

materials replaced by the Contractor at his own cost. Defective materials

demolished from work site for bad work have to be removed from work site by the

contractor, at his own expense, latest within a week, failing limit the Engineer shall

get it removed from the site in a manner he deems fit and the expenditure towards

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this shifting shall be removed from the bills of the contractor delay with penalty as

deemed fit by the engineer. In the event of such Works being accepted by carrying

out repairs etc. as specified by the Engineer, the cost of repairs will be borne by the

Contractor.

The relevant Indian Standards and the rules and regulations of local authorities in

regard to safety provisions shall be observed.

4.16 Water Tightness test

All hydraulic structures, either water supply or drainage etc., such as sewer lines,

joints etc., or any other liquid containers shall have to be tested for water tightness.

The Contractor shall give all such hydraulic tests by making his own arrangements

for water filling and disposal of water after the test and shall repeat this test, if

necessary, until the requisite test results are obtained without any claim for extra

cost or compensation. The water tightness test shall be conducted as specified in IS:

4127- 1983. The tendered rates for hydraulic structures shall include all costs

incurred by the Contractor for water tightness test. If any such hydraulic structure

or fixture is found to be unsatisfactory at the time of giving this test the Contractor

shall either repair or demolish and construct the same as directed such that the

structure is made absolutely water tight and declared as satisfactory by the

Engineer. The decision of the Engineer will be taken as final. The Contractor may

use at the time of construction, for increasing the water tightness, approved

proprietary chemicals only with the express permission of the Engineer to serve the

purpose of the Contractor to facilitate such type of work for his own convenience

and advantage. But in all such cases, the Contractor will not be entitled to any extra

rate. The Contractor shall see that every effort is made to make structures and

fixtures water tight, by resorting to such chemicals and making efficient use of

proportion and grading of materials etc., as provided originally in the Specifications.

4.17 Clearing of site - All surplus materials, and all tools and temporary structures

shall be removed from the site as directed by Engineer and the construction site left

clean to the satisfaction of Engineer.

4.18 Service lines if damaged during excavation shall be made good either by Contractor

or by other agency as Engineer may decide and the cost of the same shall be borne

by the Contractor wholly in either case.

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4.19 Contractor shall not be paid any additional compensation for excess excavation

over what is specified as well as for any remedial measures that are specified.

4.20 All steel materials shall be painted with two coats of anticorrosive epoxy paint over

a priming coat, all approved by the Authority.

4.21 The bidder shall study each item and inspect the site to his satisfaction before

quoting and detailed scope of work, is verified at site. The foundations, pipe lines

and other structures completed as a part of this tender are to be 100% safe, durable

and functional. He shall be responsible to conduct the necessary test on part of the

items of materials used and as a whole after the completion of work as per the

norms stipulated by the Indian Standard codes and satisfy the Engineer in charge/

Agreement authority on the acceptability, quality, performance and adequacy of the

system in parts and as a whole.

4.22 Tenderer should furnish the names of suppliers of each item if he is not a

manufacturer of the same. The full particulars regarding method of execution of

work or any other relevant information shall be furnished to enable the Authority

to have a correct evaluation of the technical bid in Cover B.

4.23 Blasting

4.23.1 Blasting shall be carried out in a manner that completes the excavation to

the lines indicated with the least disturbance to adjacent material. It shall be done

only with the written permission of the Engineer. All the statutory laws, regulations,

rules, etc., pertaining to the acquisition, transport, storage, handling and use of

explosives shall be strictly followed.

4.23.2 The Contractor may adopt any method or methods of blasting consistent

with the safety and job requirements. Prior to starting any phase of the operation

the Contractor shall provide information describing pertinent blasting procedures,

dimensions and notes.

4.23.3 The magazine for the storage of explosive shall be built to the designs and

Specifications of the Explosives Department concerned and located at the approved

site. No unauthorized person shall be admitted into the magazine which when not

in use shall be kept securely locked. No matches or inflammable material shall be

allowed in the magazine. The magazine shall have an effective lighting conductor.

The following shall be hung in the lobby of the magazine.

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1. A copy of the relevant rules regarding safe storage both in English and in the

language with which the workers concerned is familiar.

2. A statement of up-to-date stock in the magazine.

3. A certificate showing the last date of testing of the lighting conductor

4. A notice that smoking is strictly prohibited.

4.23.4 All explosive shall be stored in a secure manner in compliance with all laws

and ordinances, and all such storage places shall be clearly marked. Where no local

laws or ordinances apply, storage shall be provided to the satisfaction of the

Engineer and in general not closer than 300 m from the road or from any building

or camping area or place of human occupancy. In addition to these, the Contractor

shall also observe the following instructions and any further additional instructions

which may be given by the Engineer and shall be responsible for damage to

property and any accident which may occur to workmen or the public on account of

any operations connected with the storage, handling or use of explosives and

blasting. The Engineer shall frequently check the Contractor’s compliance with

these precautions.

4.24 Blasting Operations

4.24.1 The blasting shall be carried out during fixed hours of the day, preferably

during the mid-day luncheon hour or at the close of the work as ordered in writing

by the Engineer. The hours shall be made known to the people in the vicinity. All the

charges shall be prepared by the man in charge only.

4.24.2 The Contractor shall notify each public utility company having structures in

proximity to the site of the work of his intention to use explosives. Such notice shall

be given sufficiently in advance to enable the companies to take such steps as they

may deem necessary to protect their property from injury. In advance of any

blasting work within 50 m of any railway track or structures, the Contractor shall

notify the concerned Railway Authority of the location, date, time and approximate

duration of such blasting operations.

4.24.3 Red danger flags shall be displayed prominently in all directions during the

blasting operations. The flags shall be planted 200 m from the blasting site in all

directions. People, except those who actually light the fuse, shall be prohibited from

entering this area, and all persons including workmen shall be excluded from the

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flagged area at least 10 minutes before the firing, a warning siren being sounded for

the purpose.

4.24.4 The charge holes shall be drilled to required depths and at suitable places.

Blasting should be as light as possible consistent with thorough breakage of

material necessary for economic loading and hauling. Any method of blasting which

leads to overshooting shall be discontinued.

4.24.5 When blasting is done with powder, the fuse cut to the required length shall

be inserted into the hole and the powder dropped in. The powder shall be gently

tamped with copper rods with rounded ends. The explosive powder shall then be

covered with tamping material which shall be tamped lightly but firmly.

4.24.6 When blasting is done with dynamite and other high explosive, dynamite

cartridges shall be prepared by inserting the square cut end of a fuse into the

detonator and finishing it with nippers at the open end, the detonator gently pushed

into the primer leaving 1/3rd of copper tube exposed outside. The paper of the

cartridge shall then the closed up and securely bound with wire or twine. The

primer shall be housed into the explosive. Boreholes shall be of such size that the

cartridge can easily go down. The holes shall be cleared of all debris and explosive

inserted. The space of about 200 mm above the charge shall then be gently filled

with dry clay, pressed home and the rest of the tamping formed of any convenient

material gently packed with a wooden rammer.

4.24.7 At a time, not more than 10 such charges will be prepared and fired. The

man in charge shall blow a siren in a recognized manner for cautioning the people.

All the people shall then be required to move to safe distances. The charges shall be

lighted by the man-in-charge only. The man-in charge shall count the number of

explosions. He shall satisfy himself that all the charges have been exploded before

allowing the workmen to go back to the work site.

4.25. MANMADE STRUCTURES, OTHER UTILITIES- AFFECTING THE WORK

When the works under this contract are executed situations may arise when

the works are affected by other manmade structures either in service or

abandoned. It is also likely that other utility services installed by various

Government bodies are affected by the works under this contract. It shall be the

duty of the contractor to ensure whether adequate sanction has been obtained from

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the authority concerned for the work with the help of Kerala Water Authority

before the works of such affected portions are undertaken. Any damage caused to

any of the manmade structure or any of the utility services will have to be made

good by the contractor at his cost. The contractor has to restore the original

position if he has to demolish any structure like culverts, compound walls etc.

during the course of work at his own cost.

5. VENDORS LIST

Two copies of complete list of Vendors/ Manufacturers from whom the valves,

specials, spares etc. can be procured with the product specification broachers /

product identification number etc. shall be submitted by the contractor.

6.0 ADDITIONAL INFORMATION.

The following items are appended with this document for the information of the

tenderer.

Annexure - I Tentative Layout Plan of the OHSR and other proposed

components in the land

Annexure – II Location map

Annexure – III Soil investigation report

The bidder shall study each of them and inspect the site to his satisfaction before

quoting. It should be understood that it shall be the contractor’s sole responsibility

that the details under Annexure are verified at site. The foundations and other

structures completed as a part of this tender are to be 100% safe, durable and

functional. He shall be responsible to conduct the necessary test on part of the

items of materials used and as a whole after completion of work as per the norms

stipulated by the Indian standard Codes and satisfy the Engineer in charge /

Agreement authority on the acceptability, quality, performance and adequacy of the

system in parts and as a whole.

6.1 MAINTENANCE

The scope of work includes maintenance of the system for a period of 12 months

from the date of commissioning of the scheme as specified in clause 2.20.

6.2 ASSESSMENT OF COST OF WORK

6.2.1 Tenderer shall assess separately the expenditure that may have to be incurred for

each of the items and provide an itemized schedule of such works without

mentioning rates. Any item of work which has not been specifically mentioned in

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this scope of work but are found imperative for the satisfactory completion of work

shall be considered as included in this scope of work and no claim for any extra

item will be entertained unless specifically approved by the agreement authority.

6.2.2 Bidders shall quote lump sum amount for the work in the prescribed form provided

in the tender document. However, it should be clearly understood that the Authority

can not be charged for any imperfect or incorrect assessment and any unforeseen

items of work, which has not from the unit cost shall be reckoned for payments

under this contract amount.

6.2.3 Tenderer should furnish the names of suppliers of each item if he is not a

manufacture of the same. He should also furnish the full particulars regarding

method of execution of work or any other relevant information of the technical bid

in cover B.

6.3 IMPLIMENTATION SCHEDULE

The work shall be completed in all respects within 15 months and the

commissioned scheme shall be maintained for a period of 12 months from the date

of commissioning of the scheme. In case any maintenance works are attended by

KWA during this period of 12 months due to failure on part of the contractor to turn

up and complete the work, the expense shall be charged from the retention amount

or any other amount due to the contractor.

6.3.1 The contractor shall submit a properly designed schedule bar chart and CPM

network showing his plan of action for the completion of the project. The total

project shall be divided into a minimum of 12 activities and the planed progress

should be indicated clearly.

6.4 CLARIFICATIONS

All clarifications about the work if any should be sought up to 11 am. on

01-06-2018 will be answered through e-mail / published in web and any doubts raised

thereafter will not be entertained.

7 CORRECTIONS AND MODIFICATIONS TO BE INCORPORATED IN VOLUME I OF

THE NIT.

As per proceedings No. KWA/HO/WN 33/97 dated 20/09/2016,

Government Order No. GO(P)No. 429/15/fin dated 28/09/2015 of the Finance

(Industries and Public works-B) Department is implemented in Kerala water

Authority also.

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Again as per proceedings No. KWA/HO/WN 33/97 dated 25/01/2017,

Government Order No. GO(P)No 19/2016/fin dated 03/02/2016 of the Finance

(Industries and Public works-B) Department and Government Order No GO(P)

No.124/2016/fin dated 29/08/2016 of the Finance(Industries and Public works-B)

Department are implemented in Kerala water Authority in toto. (The scanned copy

of the proceedings is attached separately).

Accordingly certain corrections and modifications are to be incorporated in

Volume I of this NIT.The security deposit mentioned in vol. 1 of NIT is redefined as

Performance guarantee. So wherever the term security deposit comes in Vol. 1 of

NIT shall be read as performance guarantee. The collection, repayment and all the

matters regarding Security Deposit in vol. 1 of NIT will be according to Performance

guarantee mentioned in the above Government order.

The performance guarantee mentioned in vol. 1 of NIT is redefined as

Additional performance guarantee. So wherever the term performance guarantee

comes in Vol. 1 of NIT shall be read as Additional performance guarantee. The

collection, repayment and all the matters regarding performance guarantee in vol. 1

of NIT will be according to Additional performance guarantee mentioned in the

above Government order.

The retention amount collected from the bills of the contractor mentioned in

vol. 1 of NIT is redefined as Performance security deposit. So wherever the term

retention amount/retention comes in Vol. 1 of NIT shall be read as Performance

security deposit. The collection, repayment and all the matters regarding retention

and security deposit in vol. 1 of NIT will be according to Performance security

deposit and performance guarantee and mentioned in the above Government order.

As per the above Government order the EMD is redefined and hence the

clause 8.11 of vol. 1of NIT is modified according to item 2 of the above Government

order.All the modifications as per the above proceedings are applicable for this

tender.

The GST implemented by Government of India with effect from 01-07-2017

is applicable for this tender.

TENDERER SUPERINTENDING ENGINEER