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Tender Value
₹44.5 L
EMD Value
₹45,000
Closing Date
18 Jun 2026, 6:00 pm
The Executive Engineer, Water Resources Investigation Division, Bhuj
Construction of 2 Nos Small River CheckDam at chobari Village of Taluka Bhachau Kachchh (Karavango,ovarivaro vokdo)
311422
SBD –02 of 2026-27
Open
Civil - All
Kutch
10 documents required · 10 mandatory
₹1,500
The Executive Engineer, Water Resources Investigation Division Bhuj
₹45,000
4 Jun 2026
4 Jun 2026
4 Jun 2026
18 Jun 2026
4 Jun 2026
4 Brief Description of work
9 Camp Regulations
11 Power Supply
13 Post, Telegraphs & Telephone
14 Bank Facility
15 Supply of Petrol & Diesel
WORK AND SITE CONDITION
1.00 INTRODUCTION: -
GENERAL FEATURES OF THE PROJECT
The Purpose of work is to Construction of 2 Nos Small River CheckDam at chobari
Village of Taluka Bhachau Dis:-Kachchh (Karavango,ovarivaro vokdo)
2.00 LOCATION:-
The proposed site is situated as below: -
The proposed project site is situated near Villages: Chobari of Bhachau Taluka of
Kachchh-District.The nearest railway station is bhachau.
3.00 COMMUNICATION: -
The nearest city & town is Bhachau is a taluka place of Kachchh district. Nearest
villages are connected through VRB & SH with district and taluka place.
4.00 BRIEF DESCRIPTION OF WORK: -
WORK TO BE EXECUTED / SCOPE
(b) C.C in 1:4:8R.C.C. Work
(c) T.M.T BAR Reinforcement
(d) "NOMINAL MIX" Conc. grade 1:2:4
(e) Back filling
4.1 Proposed work consists following: -
Construction of 2 Nos Small River Check Dam at chobari Village of Taluka
Bhachau Dis:-Kachchh (Karavango,ovarivaro vokdo)
4.2 Cost of work: Rs.
II. PRINCIPAL DETAILS OF WORK:
Works to be performed for the various items included in Bill of Quantity.
The above information is only a general outline and does not in any way limit, the
performance of all work and supply of plant, machinery, all labour and materials
necessary for completing the works as shown in the approved working drawing and
mentioned in the specification. No extra payment or claim on account of any additions
or alteration in working drawing shall be admissible.
Availability is good except showing and harvesting period. However, there may be
shortage of skilled labour like masons, carpenter’s operators, mechanics etc. However,
the contractors shall have to make his own inquiry in this regard and quote his rates.
Area being highly rural, there is no local housing arrangement available and contractor
will have to make his own arrangements for his staff and labour etc.
7.00 WATER SUPPLY:
The contractor shall have to make his own arrangements of water supply for this work.
Fresh use of available water for work will be allowed free of cost to the contractor from
the river length flowing in the construction areas and area transferred to Narmada
Water Resources, W.S. & K. Department. Contractor shall have to make his own
arrangement for Pumping, purification; storage tanks, pipe line etc. for the said purpose
at his own cost.
Suitable and adequate arrangement shall have to be made by the contractor for
drainage of water around his colony and work spots. The contractor shall also have to
install and maintain at his own cost suitable drainage system to dispose off sewage &
solid waste from his colony. The labour colony layout shall be got approved from the
Engineer-in-charge.
9.0 CAMP REGULATIONS:
The contractor shall be responsible for maintaining law and order in his camp and on
his work, and shall employ such officers, watchman or other persons as required,
unauthorized or undesirable persons shall be excluded from the camp and the work. If
in the opinion (which shall not be questioned) of the Engineer-in-charge any employee
or agent of the contractor misbehaves and/or causes obstructions in the proper
execution or otherwise makes himself undesirable, the contractor shall on receipt of the
instruction to do so remove him from the premises
10.00 MEDICAL AID:
There is no dispensary on Project Site. However, there is a Government Hospital at
Bhuj / Kachchh. The Services of this Hospital will be available to contractor's staff and
labour on payment of requisite charges as may be required to be paid by the agency at
his risk & cost.
11.00 POWER SUPPLY:
Power supply shall be arranged by the contractor at their own cost. No power supply is
guaranteed by the department.
The contractor shall construct and maintain the inspection roads and quarries roads for
all purposes required during construction at his own cost. There will however be no
charge for any reasonable use of any road constructed by Government at site of work.
At present site is only approachable during fair weather.
13.00 POST, TELEGRAPHS & TELEPHONE:
Post office is available at taluka head quarter. Contractor shall make their own
arrangements for telephone if required.
14.00 BANK FACILITY:
Branches of Nationalized Bank and other Schedule Banks are available at Taluka. head
15.00 SUPPLY OF PETROL & DIESEL:
There is no petrol pump near Dam site. However, Petrol & Diesel will be available from
Taluka Head Quarter.
16.00 MATERIALS: - (Quarry details are shown for guidance purpose only)
Water is scarily available in Dam vicinity area however contractor shall have to make
his own arrangement and inquiry regarding this at his own cost.
Good quality natural sand will be available within lead of 80 km from all site of bhachau
Taluka. However, sand of required quantity may not be available in reasonable lead.
The contractor should arrange to obtain the sand of approved quality from any lead. No
extra claim shall be admissible for extra lead.
(c) COARSE AGGREGATE (CRUSHED METAL)
The black stone crushed metal for concrete work will be obtained from stone crushers
situated in the vicinity of dam site within 80 km lead near village bhachau Taluka.
However coarse aggregate of required size & quantity may not be available in
reasonable lead, the contractor
should arrange to obtain the coarse aggregate of required size & of approved quality
from any lead. No extra claim shall be admissible for extra lead.
The good quality black stone hard stone to be used in pitching / Masonary work
available within 60 km distance from dam site near village nilpar of rapar Taluka. The
contractor shall have to make his own inquires regarding availability of above materials
and other materials for work and accordingly he should quote the rates. If the materials
of required standard are not available from the specified quarries, no extra lead will be
payable by the department. Contractor should make his own arrangement to bring all
materials from any lead without any extra cost to the Department.
Signature of Contractor Executive Engineer
Water Resources Investigation Division
GENERAL CONDITION
GENERAL CONDITIONS
Sr. Particulars Page
2 Interpretations
3 Period Of Completion
4 Language Of The Contract
5 Notice And Instructions
6 Tools, Plants & Equipments And Instructions
7 Reference Marks & Bench Marks
8 Information And Data
9 Permission To Enter And Work In Private Field
11 Removal Of Contractor's Men
12 Certificate Of Completion Of Works
13 Tolls And Duties
14 Old Curiosities
15 Engineer's Decisions
16 Other Contractor's
17 Other Workmen
18 Payment And Certificates
19 Release Of Claims
21 Observance Of Laws, Local Regulations & Attachments
22 Contractor Dying Recomming Insolvent, Insane Or Imprisoned
23 For Closure Of Works By Government
24 Extension Of Time
25 Settlement Of Disputes
26 Base Lines And Grades
27 Damage By Floods Or Accident
28 Reference Marks And Bench Marks
30 Income Tax, Surcharge, Education Tax
31 Labours Welfare Cess
32 Contract Documents And Matter To Be Treated As Confidential
33 Work Order Book
GENERAL CONDITIONS
All the conditions given in the clause appearing herein after shall be deemed to
form a part of the contract in S.B.D. form and shall be deemed as supplemental to the
same. These conditions shall be binding to the contractor in the same manner as terms
and conditions in the S.B.D. Form.
1.00 DEFINITIONS:
In the contract (as hereinafter defined), the following words and expressions shall have
the meanings hereby assigned to them.
(a) Approved/Approval:
Means approved / approval in writing by the Engineer-in-charge.
Means the instructions and information for tenderers, general and special conditions of
contract, specifications, drawings, tender (including schedules of quantities & tender
prices), the formal agreement and all agenda and attachments related to the above.
(c) Contractor:
Means the particular person, firm or corporation with whom the contract has been made
for executing the works under question.
(d) Construction Plant:
Means all equipment, machineries, appliances or things of whatsoever nature required
for the execution, completion or maintenance of the work or temporary works.
(e) The Department:
Means Government of Gujarat, Narmada, Water Resources, Water Supply and Kalpsar
Department, Gandhinagar.
Means the drawings referred to in the specifications, any modifications of such
drawings approved in writing by the Executive Engineer, and such other drawings as
may from time to time be furnished or approved in writing by the Engineer-in-charge.
(g) Executive Engineer / Engineer-in-Charge:
Means the Engineer-in-charge of the works, specified parts of the works under the
contract or such other departmental assistants or subordinates referred to Engineer-in-
charge to whom the Executive Engineer may have delegated certain in duties entrusted
to them. It is however, to be distinctly understood that, no delegation of powers shall be
made to such departmental assistants or subordinates, except in respect of supervision
to ensure compliance of the contract conditions.
(h) Government:
Government of Gujarat.
Means Indian Standard specifications.
Means a day from midnight to midnight.
Means from the beginning of a given date of calendar month to the end of preceding
date of the next calendar month.
Means three consecutive seasons (winter, summer, Monsoon each includes four
months) in Calendar year.
Means seven consecutive days.
Means Rupees of Indian Currency.
(o) Employer or Owner:
Means the Narmada Water Resource, Water Supply & Kalpsar Department,
Means the lands and other places on, under, in or through which, the works are to be
executed or carried out and any other lands or places provided by the Owner on
availability for the purposes of the contract together with such other places as may be
specifically designated in the Contract or subsequently approved as forming part of the
(q) F.A., C.A., CMD, DMC; FM, PCC, RCC NMC:
Means fine aggregate, coarse aggregate, concrete mix design, Design mix concrete
Fineness modulus, Plain cement concrete, Reinforced cement concrete, Nominal mix
concrete respectively.
(r) Fck, fcr, FY, fd:
Means characteristic cube compressive strength of concrete, Modulus of rupture of
concrete (Flexural tensile strength) characteristic strength of steel, Design strength
(s) Superintending Engineer:
Means the Superintending Engineer Kachchh Irrigation Circle, Bhuj in overall charge of
(t) Chief Engineer:
Means the Chief Engineer (Panchayat) & Additional Secretary N.W.R. & W.S. Kalpsar
Department, Gandhinagar in overall charge of the work.
(u) Temporary Works:
Means all temporary works of every kind required for performance of the Contract.
Means the works to be executed in accordance with the contract.
Means Gujarat Engineering Research Institute includes head office at Vadodara and its
Regional and district level laboratories. Nearest Regional laboratory is GERI, Bhuj.
2.00 INTERPRETATIONS: -
Words imparting the singular only, shall also include the plural, 'he' includes 'she' and
vice versa, unless this is repugnant to the extent. Wherever the term specifications is
used apart from a specified standard specifications, it shall mean the specification of
plan prepared for a particular item as per instructions to the contractor for executing the
3.00 PERIOD OF COMPLETION: -
The period of completion of the work under this contract shall be 8 (Eight) months
including monsoon as idle period.
4.00 LANGUAGE OF THE CONTRACT: -
All written materials and correspondence in connection with the contract shall be in
5.00 NOTICE AND INSTRUCTIONS: -
The contractor shall furnish the postal address of his site office. Any notice or
instructions to bed given to the contractor under the terms of the contract shall be
deemed to have been served, if it has been delivered to his authorized agent or
representative at site, or sent by registered letter to the site office or to the address of
the Firm last provided by the Contractor.
6.00 TOOLS, PLANTS & EQUIPMENTS AND INSTRUCTIONS: -
The contractor shall provide at his own expenses all tools, plants and equipments and
instruments required for the execution of the work especially for the work.
7.00 REFERENCE MARKS & BENCH MARKS: -
In addition to the permanent bench marks constructed by the Department, the
contractor shall establish at his own cost, at suitable points, referenced lines and
temporary bench marks as may be necessary. The contractor shall confirm values of
permanent Bench Marks as stated above by double leveling or by Total Station before
starting the work. The contractor shall remain responsible for the sufficiency and
accuracy of all bench marks and reference lines. He shall take precautions to see that
the lines, point and bench marks fixed by the Department, are not disturbed by his work
and shall make good any such damage. Survey of levels for establishment of TBM at
work site from PBM shall be recorded in level book.
8.00 INFORMATION AND DATA: -
The information and data furnished herein related to the works and site conditions are
general. It shall be the responsibility of the contractor to fully acquaint himself with other
aspects which are relevant to the work.
9.00 PERMISSION TO ENTER AND WORK IN PRIVATE FIELDS: -
The Department will arrange to provide authority to the contractor and his personnel for
entering the private field to fulfill his obligations under this contract, for transport and
communications to the site work for the contractor shall use public roads in the area.
10.00 ACCIDENTS: -
It shall be the contractor's responsibility to take safety measures to prevent accidents
on the works. He shall indemnify the Government against any claims for damage or for
injury to persons or property resulting from and in the course of work and also under the
workmen's compensation Act. On the occurrence of an accident during the
performance of the works, which results in death of which is so serious that it might
result in death, the contractor shall immediately report the matter to the police and
within 24 hours of such accident, report in writing to the Executive Engineer the facts,
stating, clearly and in sufficient details the circumstances of such accident and the
subsequent action taken by him as may be needed under Rules/Acts in force. All other
accidents on the work involving injuries to persons or damage on the work to property,
other than that of the contractor shall be promptly reported to the Executive Engineer
stating clearly and in sufficient details the facts and circumstances of the accidents and
the actions taken. In all cases, the contractor shall indemnify the Govt. against all
losses or damages resulting directly or indirectly from the contractor's failure to report in
the manner aforesaid. This include penalties or fines, if any payable by the Govt. as a
consequence of failure to give notice under the workmen's compensation Act or failure
to confirm to the provisions of the said Act in regard to such accidents.
In the event of an accident, in respect of which, compensation may become payable
under the workmen's compensation Act. Including all modifications thereof, whether
such compensations may become payable by the contractor or by the Government as
principal employer, the Executive Engineer may retain, amount of money due and
payable to the contractor, such sum or sums of money as may, in the opinion of the
Executive Engineer-in-charge be sufficient to meet such liability. On receipt of the
award from the labour commissioner in regard to quantum of compensation the
difference in amount will be adjusted.
11.00 REMOVAL OF CONTRACTOR'S MEN: -
The contractor shall on the written direction of the Executive Engineer immediately
remove from the works, any person employed there on, who may, in the opinion of the
Executive Engineer, be in competent or has misconduct himself, such persons shall not
be employed against on the works without the written permission of the Executive
Engineer in charge.
12.00 CERTIFICATE OF COMPLETION OF WORKS: -
As soon as the works completed, the contractor shall give notice of such completion of
the Executive Engineer and within one month of receipt of such notice, the Engineer-in-
charge shall furnish the contractor with a certificate of completion or otherwise, inform
him in writing giving reasons for not granting the certificate.
13.00 TOLLS AND DUTIES: -
The contractor shall unless otherwise specified in the contracts, pay all duties, tolls,
octroi, quarry fees, royalties and other taxes on all materials and articles that he may
14.00 OLD CURIOSITIES: -
All old curiosities, relies, coins, minerals and other items of archeological importance
found in excavation or pulling down shall be the property of the Govt. and shall be
handed over to the Executive Engineer, should any structure be uncovered, the
Executive Engineer's instruction shall be obtained before its demolition or removal.
15.00 ENGINEER'S DECISIONS: -
It shall be accepted as an inseparable part of the contract that in matter regarding
materials, workmanship, removal of improper work, interpretation of the Contract
specifications, mode of procedure and the carrying out of the work, the decision of
Executive Engineer / Engineer-in-charge which shall be given in writing, shall be final
and binding to the contractor.
In case of any discrepancy between the descriptions of items in the Bill of Quantity and
Technical Specifications the former shall prevail. And further in case of any discrepancy
between the discrepancy S.B.D. and Technical Specifications the former (S.B.D. Form)
shall applicable. In case any clarification on any item is necessary, the contractor shall
forthwith apply to the Executive Engineer, any modifications in specifications ordered by
the Engineer-in-charge would be in writing.
The Executive Engineer/ Engineer-in-charge's final authority mentioned above applied
to technical considerations and does not included decisions regarding sums due to or
from the contractor or extension of time.
16.00 OTHER CONTRACTOR’S: -
When two or more contractors are engaged on work in the vicinity, they shall work
together in spirit of Co-operation and accommodation. The contractor shall not take or
cause to be taken any steps or actions taken may cause disruptions, discontent or
disturbance to the work labour and arrangements of other contractor in the neighboring
and the project locations. In case of any difficulties amongst the Contractors, the
Engineer-in-charge shall direct the matter, in which each contractor shall conduct his
work so far as it affects the others.
17.00 OTHER WORKMEN: -
The Executive Engineer shall have full authority to depute workmen on the work site,
execute other works not included in the contract. The contractor shall afford every
reasonable facility during working hours to enable such workmen to carry out the other
works provided that such work shall be carried out in such manner as not to impede the
progress of the work included in the contract. The contractor, however, shall not be
liable for any damage which may happen to or be occasioned by such other works,
provided he complied with the instruction in connection therewith and provided that the
damage is not caused by the contractor or his workman.
18.00 PAYMENT AND CERTIFICATES: -
Payment for the work done by the contractor shall be caused on measurements
recorded at various stages of the work. The contractor or his authorized agent or
representatives shall remain present at the time of recording of each set of
measurements and sign the appropriate documents in taken of their acceptance.
If for any reasons of the contractor or his authority agent is not available, and the work
is suspended the Executive Engineer to avoid recording of measurement during the
absence of the contractor or his authorized for representative does not remain present
at the time of such measurements, after the contractor has been given a three days’
notice in writing, such measurements may be taken in his absence and shall deemed
be accepted the contractor.
Payment will be made to the contractor of different stages of work done and approved
as specified in Technical Specifications.
The contractor shall submit his bills for the work done to the Engineer-in-
charge's in the printed form. The Engineer-in-charge's shall thereafter verify the
claims in the bill, and arrange for admissible payment as far as possible within ten days
of the presentation of the bill, after deducting there from all the amounts as per terms of
the contract. The full rate shall be valid only when the item concerned is accepted as
having been completed fully in accordance with the sanctioned specifications regarding
details of release of part payments. On completion of the entire work, the contractor will
submit his final bill. Payment of this bill shall not be considered conclusive evidence as
to the sufficiency of any work or materials or
correctness of measurements to which it relates, nor shall it relieve the consultant from
the liabilities arising from any defects.
All interim payments shall be treated as advance payments. All payments will be made
19.00 RELEASE OF CLAIMS: -
After completion of work and prior to final payment, the contractor shall furnish to the
Engineer-in-charge a release of claims against the Govt. arising out of the contract,
other than claims specifically identified, evaluated and accepted from the operation of
the release by the contractor.
20.00 RECOVERIES: -
Any recovery ordered by the Government shall be recovered from any bill of money
retained from this contract and shall be deemed to the arrears of land Revenue and the
Govt. may, without prejudice to any other rights and remedies of the Govt. recover the
same from the contractor as arrears of revenue.
21.00 OBSERVANCE OF LAWS, LOCAL REGULATIONS & ATTACHMENTS:-
The contractor shall confirm to all laws of the land and the regulations and bye laws of
any local authority. The contractor shall protect and indemnity govt. against all claims or
liabilities arising from or based on the violation of such laws, ordinances, regulations,
bye laws, decrees or attachments by him or his employees.
22.00 CONTRACTOR’S DEATH BECOMING INSOLVENT, INSANE OR IMPRISONED:
In the event of the death or insanity of the contractor the contract may be terminated by
notice in writing, pasted at the site and advertised in one issue or a local newspaper. All
acceptable works shall thereafter be paid at appropriate rates, after recovering all dues
of contractor to Govt. to the persons entitled to received and give a discharge for such
In the contractor is a imprisoned, becomes insolvent, has a receiving order made
against him, or carries on business under a receiver for the benefit of the creditors or
any of them, or, if it is a partnership firm it becomes dissolved, or if it is corporation it
goes into liquidation or commences to be wound up (not being a voluntary winding up
for the purpose only a amalgamation or reconstruction) the Govt. will be at liberty.
(a) To give such liquidator, receiver or other person of whom the contract may become
vested the option of providing an appropriate guarantee for the performance of such
(b) To terminate the contract forthwith by notice in writing to the contractor the liquidator,
the receiver, or person in whom the contract may become vested, and take further
actions as provided in the clause "Default by contractor' if this termination is in order
23.00 FOR CLOSURE OF WORKS BY GOVERNMENT:-
If at any time after award of the contract, the Govt. for any reason what so ever, does
not require the whole or any part of the works to be carried out, the Engineer-in-charge
shall give 10 days’ notice in writing to that effect to the contractor. The contractor shall
not have claim to any compensation whatsoever, on account of any profit or advantage
which he might have derived from the execution of such works.
There upon, the contractor shall be paid at contract rates for works executed and, in
reasonable amount as certified by the Engineer-in-charge, for the items here under
mentioned, which could not be fully utilized on the work because of the foreclosure.
(a) Preliminary site work such as temporary road, temporary labour huts, staff quarters and
the site offices, storage accommodation water storage tank, etc. which was necessary
for execution on the works under the contract.
(b) Contractor's material either brought to site or for which the contractor is legally bound to
accept delivery from the suppliers, provided however, the quantities or such materials
are not in excess or reasonable requirements of works. The decision of the Executive
Engineer for works will be final and conclusive. If the contractor wishes to take away
some of the materials the Executive Engineer may permit him to do so.
(c) Mobilization and repatriation of contractor's site staff and imported labour. The
contractor shall if required by the Executive Engineer, furnish him books of account and
other relevant documents as may be necessary to enable him to certify the reasonable
amount payable under this condition.
24.00 EXTENSION OF TIME:-
Time shall be considered as the essence of the contract. If however, the failure of the
contractor to complete the work as per the stipulated dates referred to the above arises
from delays on the parts of the Govt. in supplying the basic data, such as B.M. Values,
ruling level, Contractor Maps as a Counter-part assistance provided in the tender,
Design mix/Nominal mix, handing over clear site etc. that it has undertaken to supply
under the contract, with a time frame set or from delays in handing over sites, or from
increase in the quantity of work to be done under the contract, or change in scope of
work or Force Majure, an appropriate extension of time will be given. The contractor
shall request such extension within one months of the cause of such delay and in any
case before expiry of the contract period.
25.00 SETTLEMENT OF DISPUTES:-
If the contractor considers any work demanded of him to be outside the requirements of
the contract, or considers any drawings, record or ruling of the Engineer-in-charge of
any matter in connection with or arising out of the contract or the carrying out of work,
to be unacceptable he shall promptly ask the Executive Engineer, the Executive
Engineer shall give his written instructions or decision within a period of thirty days of
Upon receipt of the written instructions or decision, the contractor shall promptly
proceed without delay to comply with such instructions or decision.
If the Executive Engineer fails to give his instructions or decision in writing within a
period of thirty days after being requested, or if the contractor is dissatisfied with the
instruction or decision of the Executive Engineer, the contractor, may within thirty days
after receiving the instructions or decision, appeal to the Superintending Engineer, who
will afford an opportunity to the contractor to be heard and to offer evidence in support
of his appeal. The Superintending Engineer will give decision within a period if sixty
days after the Contractor has given the said evidence in support of his appeal. The
decision of the Superintending Engineer shall be final and binding to the contractor.
26.00 BASE LINES AND GRADES:-
A. Permanent base line (and cross lines) shall be established at sufficiently close intervals
with bench marks at all corner points to serve as “ Reference Grid ”. The contractor
shall provide at his expense, all templates, pillars, stacks, equipment, materials and
labour for establishing the grid lines and pillars & preserve during the whole period of
construction. These shall be laid out with prior approval of the Engineer-in- charge. No
base line or bench mark or reference mark shall be used as reference line, or bench
mark or level for the work without prior approval of the engineer. The contractor shall
maintain certified copies of such approved reference lines, marks and levels and shall
not remove any of them without prior approval of the engineer.
B. The contractor shall further lay out the work from these reference base lines in
consultation with the engineer and shall established level connection therewith
notwithstanding the fact that the same might have been checked by the Engineer's staff.
C. The contractor shall be responsible for proper execution of the work to such lines and
grades as may be specified on the drawings or established or indicated by the
27.00 DAMAGE BY FLOODS OR ACCIDENT:-
The contractor shall take full precautions against any damage to the work by flood or
from accidents. No compensation shall be allowed to the contractor for his plants or
materials lost or damaged by floods, unanticipated or otherwise, or from such other
cause, during monsoon or unexpected rains, and he shall be liable to make good any
damage to the plant, machinery or materials of Department hired by him and lost or
damaged by flood or from any other cause while in his possession for use on works.
28.00 REFERENCE MARKS AND BENCH MARKS:-
The basic center line, reference points and bench marks will be fixed by the
Department However the material and labour required for this shall be supplied by the
contractor. The contractor shall establish at his cost, at suitable points, additional
reference lines and bench marks as may be necessary. The contractor shall remain
responsible for the sufficiency and accuracy of all these bench marks and reference
marks. He should take precautions to see that the reference lines or points and bench
marks fixed by the Department are not disturbed by his work and shall make good the
damage at his cost.
29.00 OTHER TAXES:-
The rates to be quoted by the tenderer shall be inclusive of all taxes, excise etc. and no
claim whatsoever in these connections shall be entertained. GST Applicable as per
S.B.D. Section-1(C) Preparation of Bids Clause-13.3
30.00 INCOME TAX, SURCHARGE, EDUCATION TAX:-
Government will recovered central taxes like I.T., S.C. & E.C. as per the Income Tax
Act-1961 and amended from time to time under works contracts from each R.A. Bills/
31.00 LABOURS WELFARE CESS:-
As per prevailing rules under labour Act, labour welfare cess shall be recovered from
R.A. Bills/ Final bill.
32.00 CONTRACT DOCUMENTS AND MATTER TO BE TREATED AS CONFIDENTIAL:-
All documents, correspondence and other matter concerning the contract shall be
considered as confidential and restricted in nature by the contractor and he shall not
divulge or allow access to them by any unauthorized person.
33.00 WORK ORDER BOOK:-
A work order book as prescribed by the Government will be required on the work and
the contractor shall sign the orders in token of acceptance as given by the Engineer-in-
charge or his representative. He shall carry out the orders in true spirit and as required
for the correct performance of the contract. Work order book is the property of the
Department and shall remain in the custody of the Department supervisory staff on
duty. The compliance shall be carried out promptly and reported to the Engineer-in-
charge in good time by the contractor so that the work can be checked. If the contractor
fails to take note of orders or instructions issued in the work order book or tries to avoid
the same, the Engineer-in-charge will have power to take suitable recourse. Any such
action of the engineer for the non-compliance on the part of the contractor shall be
binding upon him.
Signature of Contractor Executive Engineer
Water Resources Investigation Division
SPECIAL CONDITION.
SPECIAL CONDITIONS
Sr. Particulars Page
1 Accuracy of Line, Level & Grades
2 Testing of Materials and works
3 Recovery of hard rock available from excavation
4 Loans of Government’s Tools, Plant & Machinery
5 Assistance in Procurement of Properties, Permits, Import
License, Exchange Facilities etc.
6 Security Measures
7 Applicability of Specifications
8 Dewatering & Diversion as and where Required
9 Applicable Publication
SPECIAL CONDITIONS
1.0) ACCURACY OF LINES, LEVELS AND GRADES:
The various works shall be done true to the line, levels and grade. The periodical
checking of these works by the government staff shall not absolve the contractor of his
responsibility regarding the accuracy of lines, levels and grades. In case of any
deviation or discrepancy in line, level or grade at the meeting faces, the contractor shall
have to make good the discrepancy at his own cost and without any extra
compensation for the additional work involved. Whenever such discrepancy is found to
arise at the junction of works of different contractors, the responsibility to set right such
discrepancy lies with contractors concerned. The engineer in charge shall further have
been unquestioned right if need to be rectify the discrepancies and recover the cost
from the contractor or contractors according to proportion as he may consider
2.0) TESTING OF MATERIALS AND WORKS:
2.1 All materials before being incorporated in the work shall be inspected visually & by
common field tests according to Table-2 of GERI guidelines for Quality Control &
Quality Assistance Vol.1,2002 and if necessary tested before being approved by the
Engineer. Any work on which such materials are used without prior inspection (and
when necessary prior testing) and without approval or written permission of the
Engineer- in -charge is liable to be considered as unauthorized, defective and not
acceptable. Testing charge shall be paid by department only as per S.B.D. Section-3
(C) clause 34. Any additional test required to be carried out at any stage of the work as
per instruction of Engineer - in -charge etc/ C.E (Q.C) / E.E (Q.C.) / D.E.E.(Q.C.) shall
be carried out at department’s cost, However sample test results are failed then
retesting charges shall be borne by the contractor, but if sample test results are found
ok, the Cost of testing charges of material shall be borne by the department.
2.2 The contractor shall, however supply all material required for tests and also make good
at his cost with materials, mixes, core holes and similar for other materials as may be
directed by and to the satisfaction of the engineer in charge. An authorized
representative of the contractor shall have to remain present at the time when the
sample or cores etc are taken & shall be authenticated the facts, if so required. When
the contractor's agent fail to remain present at aforesaid time, the sample or cores etc,
taken by the engineer in charge or his representative shall be considered to be
authentic. The contractor will however, be informed about the details of such sample
and cores etc that have been taken.
2.3 The materials, mixes and cores etc. shall be tested at field laboratory / GERI / other
government approved laboratory and the results given by them shall be considered
correct and authentic. The contractor shall be given access to all operational tests that
may be carried out as aforesaid, so that, he may satisfy himself regarding the
procedure and methods adopted. It shall than be contractor's responsibility to carry out
the finished item of work to the standard based on the laboratory design and test.
2.4 The method of sampling and testing and procedures and standard shall be as laid by
respective IS code of practice and GERI manual / as mentioned in the tender.
2.5 (a) DESIGN MIX ( DMC ) OF CONCRETE :
Concrete mix design of stipulated or designated grades of concrete shall be carried out
at GERI laboratory/or Govt. Approved laboratories. All materials required shall be
supplied, loaded, carted and unloaded at respective Laboratory by contractor at his own
(b).NOMINAL MIX (NMC) OF CONCRETE:
No mix design is necessary for nominal mix concrete. Nominal mix shall be carried out
as per table mention in the regional S.O.R-2024-2025 .Page no-68. Preliminary test
cubes of size 15x15x15cms shall be casted and tested for 7 days and 28 days, well
before starting of actual work at departments own field laboratory / Govt. Approved
Laboratory at the cost of department.
2.6 The materials, mixes, cores etc. shall be tested day to day or periodically at the field
laboratory set up at the site of work by the contractor at his own cost or nearby regional
or district level GERI laboratory or Engineering/Polytechnic colleges in Gujarat or
government approved (R&B, IRRIGATION Deptts. etc) private laboratories where
facility of testing are available as per BIS rules & regulation or Government approved
private institutes and the results given there by shall be considered correct and
1. The schedule showing number and type of lists to be carried out under this
contract is attached with this tender. Out of total number of such tests,80% tests
will be carried out in site laboratory, 10% in Government approved laboratories
and 10% in GERI laboratories. However minimum one test of all types of tests
shall have to be carried out in GERI laboratories only.
2. Site laboratory tests will be carried out by qualified Engineer or Executive
Engineer-in-charge of the work.
3. 80% of site tests will not be carried out at one time but will be related to the
progress of work and consumption of materials
4. Prescribed registers for recording details and results of tests will be maintained
on site of work.
5. The tests which are not done in GERI laboratories e.g. electromatic bearing etc.
will be carried out in the laboratory Consented by the Executive Engineer. (R &
B Circular No. PARCH-1o2007-28-C, dated 31-12-2009)
6 The choice of testing laboratory where test to be carried out shall on sole
discretion of Engineer in charge. If there are any dispute regarding test results,
GERI / NSIC / Govt. Engineering college, test results shall be final and binding
to all. If test results of sample does not complies relevant BIS code further
investigation shall be carried out as per BIS: 456-2000 or relevant BIS code of,
Practice prior to rejection of work. The contractor shall be given access to all
operations of tests that may be carried out as aforesaid so that he may satisfy
himself regarding the procedure and methods adopted. It shall then be
contractor's responsibility to carry out the finished items the standards based on
the laboratory design and tests.
2.7 The day to day and periodical tests to be carried out on materials, mixes, cores and
placed concrete, mortar etc. shall be specified by the Engineer-in-charge from time to
time and the contractor shall allow all facilities and co-operation toward collection of
samples, transportation up to any laboratories, all labour for collecting samples, casting,
testing of cubes shall be supplied by contractor without any extra payment.
2.8 Contractor shall have to construct pucca underground curing water tank of minimum
size 2.0 x 2.0 x 0.60 mt (or size as directed as per size of the project) at nearby site of
work for curing of cubes as per Engineer's instructions. No extra payment shall be
made for this to the contractor.
2.9 It shall be responsibility of the contractor to provide clean water to fill the curing tank &
maintain full water level in curing tank periodically and also maintenance of leak proof
curing tank throughout the work without any extra payment for this.
2.10 Contractor shall have to provide sufficient 15 cm cube moulds and skilled labours for
laboratory and field tests of works and materials for activity such as:
(i) Cleaning, fitting and unfitting of moulds, oiling etc.
(ii)Carting of moulds and placement in to curing tank.
(iii)Transporting the cubes from site of work to field laboratory for testing.
(iv)Helping in cube testing on compressive machine etc. All facilities for carrying out
field test on various materials, mixes and cores shall be provided by contractor. No
extra payment for above work shall be made to the contractor.
2.11 The method of sampling and testing procedures and standard shall be as laid down by
the Engineer-in-charge for respective items.
3.0 RECOVERY OF HARD ROCK AVAILABLE FROM EXCAVATION:
(1) As per Govt. of Gujarat N.W.R.W.S. and Kalasar Dept. Order No. MI Cell /102010 /17
/(2) K-1, Dt.21/01/2014, for the hard rock, which is excavated from the work will be
allotted to the agency.
The amount will be recovered at the rate (i) The amount will be recovered at the rate
Rs. 224.08 per Cum excluding GST(As per R&B SOR 2024-25). In addition,
necessary royalty for these materials have to paid by the agency as per prevailing rules
and regulation to the Industries & Mines Dept. according to classification of materials.
The quantity will calculated as per instruction of Engineer-in-charge. This fact should be
kept in mind while quoting the tender rates of these items.
(2) OTHER MATERIALS:
Other materials required for the work shall be procured by the contractor. The
specifications mentioned in the chapter of MATERIAL SECTION shall be applicable.
The selected material for required quantity of earth work for respective item of
work shall be brought from outside borrow area including all lead and lift, the
contractor makes his own arrangement for obtaining materials from outside
borrow area required without any extra cost, as
borrow area is not available nearby the site of work due to forest land in vicinity.
Also contractor shall have to make his own arrangements for necessary land
required for camp and plant & machinery installation without any extra cost.
4.0 LOAN OF GOVERNMENT FOR TOOLS & PLANTS AND MACHINARIES:
The machinery and tools & plants as and where available with the department shall be
supplied on hire as per rules and regulations and as per the provisions contained in
Government PWD GR No- MCN / 167 / 97,Part-iv / h, dated 01--10-1980 and as
amended from time to time. It must be also noted that the machineries or equipments
actually justified for the use in the work and available with the department will be given
on hire. No claim for delay in procurements of such machineries or equipment shall be
entertained. At present no machineries or tools and plants are available with the
5.0 ASSISTANCE IN PROCUREMENT OF PROPERTIES, PERMITS, IMPORT LICENCE,
EXCHANGE FACILITIES ETC.
Generally, it shall not be realized in the normal course by the department for providing
assistance in purchase of Tools & Plants and Machineries required for the execution of
work, contracted for. However, the engineer in charge, on request by the contractor
shall assist in the procurement of necessary import license, exchange facilities etc. for
importing necessary plants & machineries, which is not locally available and engineer in
charge deemed it in the interest of work and its progress. The government shall not
however, be responsible for non availability of any of the above facilities or delay. The
contractor's application for import license etc. will be scrutinized by the engineer in
charge regarding the responsibility of the government etc and recommendations will be
made as deem fit. The decision of engineer in charge in this regard shall be final and no
claim either in cost or delay in time will be admissible.
6.0 SECURITY MEASURES:
In view of the strategic importance of all the project and installations, security restriction
may be imposed by the engineer in charge as per directions of the security authorities
contractor shall abide by, to implement all such instructions scrupulously. In case a
system of identity cards with photos is introduced, than the contractor shall have to
provide the same to his personnel at his cost. The identity cards shall be duly signed by
engineer in charge. The contractor shall also keep informed regarding all visitors and
obtain permits for their visitors. No authorized visitors will be allowed on site of work.
7.0 APPLICABILITY OF SPECIFICATIONS:
Considering the common general item required in executive of irrigation project, general
subject wise specifications has been drawn and provide separately with the tender. This
provision suitably provides requirements of execution of each component of work in
general, consistent with the present practice of the scope of work & more of execution
and standards to be observed etc for the work. To avoid descriptive matter, suitable
reference for the relevant IS ( BIS ) code or otherwise is also specified. The whole idea
is to guide the tenderer regarding the execution of work, so as to base his rates
accordingly. The general subject wise specifications are further supplemented in
separate chapter to cover the item wise specification of work as per the Bill of Quantity
of the tender. These item wise specifications shall cover the applicable provision of the
general specification, considering the item description as per Bill of Quantity Over and
above this, the specific requirement of each item such as applicable lead and lift,
proportion of concrete & mortar mix, description about the execution of the item in detail
and other applicable aspects will be covered in detail/item wise specification. Intending
tenderers are there for requested to read the tender papers on above lines and quote
8.0 DEWATERING AND DIVERSION AS AND WHERE NEEDED:
If, there is no separately provision for dewatering, diversion of water and construction of
temporary diversion road during construction in the fair weather as well as in the
monsoon, the rates of respective item of works quoted by the contractor shall be
consider inclusive of dewatering and diversion as and where needed with maintaining it
during construction. In such condition no extra payment shall be made for dewatering &
diversion of water, road diversion etc. Also no payment shall be made for any part of
earth work of materials washed away or damaged during monsoon or other period and
it shall have to be made good by the contractor at his own cost. It is the responsibility of
the contractor to make good, or repair any government property, materials to be utilized
for the work or completed part of present work damaged during the construction period.
If there is a separate item for care and diversion in the tender, then general technical
specification for "care and diversion "shall be applicable.
9.0 APPLICABLE PUBLICATIONS:
All methods or procedure for execution of different items of work shall confirm to the
INDIAN STANDARD ( IS ) now renamed as BUREAU OF INDIAN STANDARD (BIS)
Specifications. The latest addition shall be followed. Some of the important IS
publications are listed below. The provisions of these IS specifications shall be
IS OR BIS CODE NO VERSION SUBJECT OF CODE
EXCAVATION AND EARTH WORK
2720 Part-I Latest Method of test for soil-partical size
2720 Part-III Latest Determination of water contents, dry
density relation using light compaction
2720 Part-IV Latest Grain size analysis
2720 Part-5 Latest Determination of liquid and plastic
1498 Latest Classification and identification of
soil for general engineering purposes
2720-Part-III / sec-1&-2 Latest Determination of Sp. Gravity
9429 Latest Drainage system for earth and
3764 Latest Safety code for excavation work
269 Latest Specification for OPC cement
12269 Latest Specification for 53 grade OPC
1489 Part-1 & 2 Latest Specification for 53 grade PPC
432 Latest Specification for MS & medium
tensile steel bars
1786 Latest Specification for HYSD bars
280 Latest Specification for Binding wires
2386 Part I to VIII Latest Method of various tests for
383 Latest Coarse and fine aggregate from
natural sources for concrete
10262 Latest Concrete mix design
456 Latest Plain & Reinforceed concrete
457 Latest Plain & Reinforced concrete for
Dams & other massive structures
3873 Latest Laying in situ cement concrete lining
9556 Latest Construction of diaphragm walls.
14334 Latest Cost. Of diaphragms for under-
seepage control.
IS:3873-1978 Latest Code of practice for laying in situ
cement concrete lining of canals (first
IS:5256-1968 Latest Code of practice for sealing joints in
concrete lining on canals
2116 Latest Sand for masonry mortar
1121 Latest Testing for stone-Comp. Strength
1126 Latest Testing for stone-Soundness
1124 Latest Testing for stone-Water absorption
1526 Latest Sand for plastering work
IS OR BIS CODE NO VERSION SUBJECT OF CODE
15068 Latest PVC Water stop
4985 Latest PVC Pipes
2266 Latest Wire Rope
11855 Latest Rubber seal
Signature of Contractor Executive Engineer
Water Resources Investigation Division
GENERAL TECHNICAL SPECIFICATIONS
GENERAL TECHNICAL SPECIFICATIONS
Sr. Particulars Page No.
Standard General Technical Specifications
Specification of Principal Materials
General Specification of Concrete
Clearing the site & Excavation for Foundation including
STANDARD GENERAL TECHNICAL SPECIFICATIONS
: STANDARD GENERAL TECHNICAL SPECIFICATIONS:
1.1 All the items occurring in the work and as found necessary during actual execution shall
be carried out in workman like manner as per specifications below and as per written
orders of the Engineer-in-charge.
1.2 A work order book as prescribed by the Engineer-in-charge shall be maintained on the
site of work and the contractor shall carryout field compliance properly.
1.3 The contractor shall engage authorized representative who shall be responsible and
competent for managing the work. He shall take orders from the Engineer-in-charge
and shall be responsible for carrying out the same.
1.4 Quantities specified in the tender may vary at the time of actual execution and the
contractor shall have not to claim for compensation on account of such variation.
1.5 No trees shall be cut without permission of Engineer-in-charge.
1.6 Diversion for roads if necessary shall be provided and maintained during the currency
of the contract without any extra cost to the Department.
1.7 The work shall be executed strictly in accordance with plans & specifications. Only the
best materials and sound construction shall be executed in a through workman like
1.8 The drawing prepared and trial pits taken are for general guidance and indication and
changes either minor or major are likely to take place. No claim for extra payment shall
be made by the contractor for such changes.
1.9 The quantities in the schedule are only estimated quantities and during execution they
may increase or decrease. Any claim put forward for this variation in quantity shall not
be entertained.
1.10 The rejected materials shall be removed from the site within 24 hours. If they are not
removed within this period, the same will be removed at the contractor's risk and cost
by the Department.
1.11 The work is an important work and this fact shall be constantly borne in mind by the
contractors and his workers. Works not specified above shall be carried out according
to P.W.D. Hand Book or according to instructions of the Executive Engineer.
1.12 The work requires constant attention for line, levels and workmanship and hence the
contractor shall have to keep the experienced technical staff on the work. The
contractor has to supply the necessary materials and labour for the line and levels work
at his own cost.
1.13 The contractor unless otherwise specified and providing in the contract shall pay all
duties, tolls, quarry fees, royalties and taxes on all materials and articles they may use.
The rate quoted by the contractor shall be considered inclusive of all such duties, fees,
royalties, taxes etc.
1.14 In the specification “as directed / approved” shall be taken to mean “as directed /
approved “by the Engineer - in - Charge.
1.15 Wherever a reference to any India Standard appear in the specifications, it shall be
taken to mean as reference to the latest edition of the same in force on date of
1.16 In “Mode of Measurement " in the specifications, wherever a dispute arises in the
absence of specification of a particular point or aspect, the provision on these particular
points or aspect in the relevant Indian Standard shall be referred to.
1.17 All measurement and computations, unless otherwise specified, shall be carried out
nearest to the following limits:-
(1) Length, Width and Depth (Height) 0.01 Meter.
(2) Areas 0.01 Sq. Mt.
(3) Cubic Contents (Except Wood) 0.01 Cumt.
(4) Cubic Contents (Wood Work) 0.001 Cumt.
In recording dimensions of work in measurement book the sequence of length, width
and height (depth) or thickness shall be followed.
1.18 The distance with constitutes lead shall be determined along the shortest practical route
and not necessarily the route actually taken. The decision of the Engineer - in - Charge
in this regard shall be taken as final.
1.19 Where no lead is specified, it shall mean “all leads ".
1.20 Lift shall be measured as per current practice for relevant item under direction or
decision by Engineer-in-charge.
1.21 Definite particulars covered in the items of work, through not mentioned or included in
it’s specifications, shall be deemed to be included therein.
1.22 Reference to specifications of materials as made in the detailed specification of the
items of work is in the form of a designation containing the number of the specification
of the material and prefix "M" i.e. “M-1 “etc.
1.23 Approval to the samples of various materials given by the Engineer-in-charge shall not
absolve the contractor from the responsibility of replacing defective material brought on
site or materials used in the work found defective at a later date. The contractor shall
have no claim to any payment or compensation whatsoever on account of any such
materials being rejected by the Engineer - in - Charge.
1.24 The contract rate of the item of work shall be for the work completed in all respects.
1.25 No collections of materials shall be made before it is got approved from the Engineer -
1.26 Collection of approved materials shall be done at site of work in a systematic manner.
Materials shall be stored in such a manner as to prevent damage, deterioration or
intrusion of foreign matter and to ensure the preservation of their quality and fitness for
1.27 Materials if and when rejected by the Engineer-in-charge, shall be immediately
removed from the site of work.
1.28 No materials shall be stored prior to, during and after execution of a structure in such a
way as to cause or lead to damage or overloading of various components of the
1.29 All works shall be carried out in a workman like manner as per the best technique for
the particular item.
1.30 All tools, templates, machinery and equipment for correct execution of the work as well
as for check line, levels, alignment of the works during execution shall be kept in
sufficient number and in good working condition on the site of work.
1.31 The contractors shall be responsible for observing the rules and regulations imposed
under the “Mine and Minerals Act “and such other laws and rules prescribed by Govt.
from time to time.
1.32 All necessary safety measures and precaution (including these laid down in the various
relevant Indian Standards) shall be taken to ensure the safety of men / women,
materials and machinery on the works and also of the work itself.
1.33 Approval to any of the executed item for the work does not in any way relieved the
contractor of his responsibility for the correctness, soundness, strength of the structure
as per the drawings and the specifications.
Signature of Contractor Executive Engineer
Water Resources Investigation Division
SPECIFICATION OF PRINCIPAL MATERIALS
SPECIFICATION OF PRINCIPAL MATERIALS
The following specifications are only for the principal materials of construction
which are included in the details specifications of items and indicated the requirements
of qualities of materials. They are given as guide and neither includes all the materials
of construction nor exhibits all their desirable qualities. This should be supplemented by
detailed specifications as per relevant IS Code unless otherwise not mentioned. The
rate of all items are inclusive of all materials inclusive of all lifts and leads for the
material unless otherwise specified in detailed specifications.
The water to be used shall be potable water, clean & free from objectionable quantities
of silt, organic matters alkali, salts and other injurious materials and shall be as per I,S.
456:2000. Water sample shall be tested in Government or Government approved
laboratories, once before starting of work and than starting of new working season.
Permissible limit for some of the important parameters are as under.
TEST PERMISSIBLE LIMIT AS PER IS-456-2000
1 Organic solids 200 mg. per litres (max.)
2 Inorganic solids 3000 mg. per litres (max.)
3 Sulphates (as So2) 400 mg. per litres (max)
4 Chlorides (as CI) 2000 mg./lit. (Max.) for PCC. And 500 mg/lit (Max.) for RCC
5 Suspended Matter 2000 mg. per litres (max.)
6 Ph Value Not less than
Cement shall be ORDINARY PORTLAND CEMENT (OPC) of grade 53 only conforming
to IS-12269:2013 OR Rapid hardening Portland Cement confirming to IS 8041:1990
OR Blast furnace slag cement confirming to IS 455:1989 OR PORTLAND POZZOLANA
CEMENT (PPC) of grade 53 only confirming to IS-1489:1991 (Part-1) or (Part-2). The
cement shall be used only OPC 53 grade but any of the above and the type selected
should be appropriate for the intended use as per the instruction of the engineer-in-
charge. Portland Pozzolana Cement (PPC) shall be used only under separate
authorization by engineer in charge and wherever so permitted.
The contractor shall have to make his own arrangement to procure the cement bearing
I.S.I. mark directly from the major cement manufacturing plants having installed
capacity of one lakh tonnes per annum or its authorized dealers only. The contractor
shall arrange to cart, load and unload the same to the site of work at his own cost. The
cement brought to site shall be tested in Government or government approved
laboratory as per provision in IS-269.
The cement bags shall be neatly stacked in a orderly manner so as to afford easy
access and count in a damp proof condition. If the consumption of cement exceed
25.00 MT., than the cement shall be stored in tin shed go down or in a pucca go down,
one feet above the ground, so as cement can be prevented from atmospheric effect.
Deteriorated cement shall not be allowed to use.
The testing of the cement shall be done for each lot / consignment received on site. The
frequency of test shall be as under.
Quantity of Consignment No. of Test Specimen
For each larger consignment
All physical tests required as per IS-4031 (Part 1 to 6) – 1988 shall be carried out as
per frequency mentioned in the table above. While the chemical test shall be carried out
as per IS-4032-7986 one for ten physical test sample.
Each consignment shall be stacked separately and shall be used on the basis of first
cum first used. The cement shall be used after testing only. The cement older than
days shall not be allowed to use.
The cement lot failed in testing shall be removed immediately from the site. A day to
day account of cement received & used on the work together with the particulars of the
work and quantity of the work and quantity of the work in which it was used, shall be
maintained separately by the representative of the department. And shall be signed at
the end of the day’s work, both by the department’s representative and the contractor.
The contractor shall have to produce original voucher/ bill (Retail invoice or Tax invoice)
for the same along with physical and chemical test report when ever asked by engineer
M-3 SAND (FINE AGGREGATE) ::
All fine aggregate shall be natural river sand and shall confirm to IS-383 -1970. Sand
shall be of natural river sand having Fineness Modulus (F.M.) from 2.1 to 3.2 for all
concrete works. It shall be clean, well graded, hard, durable and strong and free from
injurious amount of dust, clay, silt, kankar nudules, soft or flakey particles, shale, alkali,
salts, organic matter, loam, mica or other deleterious materials.
Grading of the fine aggregate (sand) shall be as per Table – A given below.(IS-383
page No. 11 table-4)
IS Sieve PERCENTAGE PASSING FOR
Grading Grading Grading Grading
Zone –I Zone -II Zone -III Zone –IV
Sand of grading zone - iv shall not be used for concrete work.
Limits of various deleterious materials in fine aggregate shall be as per mention below.
Sr. DELETERIOUS Limit REMARKS
No. MATERIAL (% by weight
1 Coal and Lignite 1.00 IS-383-1970-& IS-2386 (part-
2 Clay lumps 1.00 IS-383-1970-& IS-2386 (part-
3 Material finer than 75 3.00 IS-383-1970-& IS-2386 (part-
micron IS sieve (Silt) I)1963
4 Soft Fragment - IS-383-1970-& IS-2386 (part-
5 Shale 1.00 IS-383-1970-& IS-2386 (part-
6 Total % of all deleterious
materials (except mica)
Sand for masonry mortar and plastering work shall only be used after screening
through proper number screen and shall confirm to IS-2116 for masonry mortar and to
IS-1526 for plaster work.
The fine aggregate should be stacked carefully on a clean and hard surface so that it
should not be get mixed up with deleterious foreign materials, Segregation of heavier
particles by sliding down may be not stacking in high conical heaps.
The particulars of tests and frequency shall be as mention below.
Sr. PARTICULARS OF FREQUENCY REMARKS
1 Gradation and F.M. One test per 150 IS-383-1970- & IS-2386-
concrete/masonary
2 Sp. Gravity and Water Once for new IS-383-1970- & IS-2386-
Absorption quarry/change in
3 Silt Content One test per 150 IS-383-1970- & IS-2386-
concrete/masonary
4 Alkali aggregate Once for new IS-383-1970- & IS-2386-
reactivity quarry/change in
When required to be measured, the measurement shall be by volume in cum. No.
deduction shall be made for voids.
M-4 COARSE AGGREGATE ::
The coarse aggregate for the use of making concrete and other purpose shall be of
black stone crushed metal. It shall be clean, hard, durable & free from alkalies and
other deleterious substance. The coarse aggregate shall be well grade and generally
be cubical in shape. The gradation shall give a dense & water tight concrete of
specified strength and consistency. The actual gradation shall be as indicated by the
laboratory study.
The grading of the coarse aggregate shall be as per Table – A given below (IS-
383:1970 Page No. 9 table - 2).
Single sized aggregates and nominal size
IS Sieve designation % Passing for graded aggregate of nominal size.
IS Sieve designation
% Passing for graded aggregate of nominal size.
SIZE OF AGGREGATE ::
The size of coarse aggregate for mass concrete shall be as Table – B given below (IS-
383-Page No.-10 table – 3).
CLASS SIZE IS Sieve Designation % Passing
Very large 150 to 80 mm. 150 mm. 90 to
Large 80 to 40 mm. 80 mm. 90 to
Medium 40 to 20 mm 40 mm 90 to
Small 20 to 4.75 mm 20 mm. 90 to
The nominal maximum size of coarse aggregate shall not be greater than one fourth of
the minimum thickness of the member for PCC work,. In case of RCC members
maximum size of coarse aggregate shall be such so as concrete can easily placed in
the members without honey combing. It can be determined as follow.
(i)One fourth of the minimum thickness of the members. (ii) The minimum clear
distance between main bars minus 5 mm. (iii) The minimum cover to the reinforcement
minus 5 mm. whichever is smaller.
The minimum and maximum size of the aggregate shall be between 4.75 mm. to
DELETERIOUS MATERIALS ::
Deleterious material as described and its acceptance criteria for coarse aggregate shall
be as per IS-383-1970.
The material subjected to tests for gradation, flakiness and elongation, abrasion value,
soundness crushing/ impact value, and deleterious materials etc as per IS-383.
Following is the acceptance limit.
i) Flakiness and elongation : 30 % maximum.
ii) Abrasion value. : 40 % maximum.
iii) Soundness. : 12 % loss with Na2So4 and 18 % loss with MgSo4
iv) Crushing value. : 45 % for concrete and 30 % for wearing surface.
v) % of deleterious material. : 5 %
vi) Sp. Gravity. : 2.5 Minimum.
vii) Water absorption : 1.5 % maximum.
FREQUENCY OF TESTING ::
The particulars of tests and its frequency shall be as mention below.
Sr. PARTICULARS OF FREQUENCY REMARKS.
1 Gradation One test per 150 IS-383-1970 & IS-2386-
cum. Of concrete
2 Sp. Gravity and Water Once for new IS-383-1970 & IS-2386-
absorption quarry/ change in
3 Flakiness and Once for new IS-383-1970 & IS-2386-
elongation. quarry/ change in
4 Alkali aggregate Once for new IS-383-1970 & IS-2386-
reactivity quarry/ change in
5 Impact value. Once for new IS-383-1970 & IS-2386-
quarry/ change in
The aggregate of different size shall be stacked or batched or stored separately and
handle in such a manner as to prevent inter mixing of different size of aggregates. No
foreign materials shall be allowed to mixed up with the aggregates.
When required to be measured, the measurement shall be by volume in Cum. No.
deduction shall be made for voids.
M-5 STONE (BLACK STONE RUBBLE)::
The stone shall be of good quality hard stone. The stone shall be hard, sound,. Durable
and free from defect like cavities, cracks, sand holes, flaws, injurious veins, patches of
loose or soft materials etc. & weathered portion & other structural defects to affect
their soundness and strength. The stone with round surface shall not be used. The
source of the stone shall be got approved from the engineer in charges well before
carting the same to site, The contractor shall have to arrange to cart, load, unload,
stack the same to the site of work at his own cost from specified lead.
Weathered skin maximum up to 2 mm. thickness shall be allowed on one face of the
stone only and shall not be more than 33 % of total number of stone used.
Stone to be used for masonry, shall confirm to IS-8605 for quality. Sample of stone
from new quarries shall be tested for specific gravity, compressive strength, water
absorption and soundness for once to ensure suitability of stones for masonry. The
water absorption of stone shall not exceed limit of 5 % of dry weight after being kept in
water for 24 hours and shall be in accordance with IS-1124. Compressive strength shall
not be less than 200 kg/cm2 for stones to be used in masonry.
Stone to be used for pitching, launching apron and such other application, shall be
tested for specific gravity, water absorption, soundness/durability and watering test for
once. Stone shall be tested in government or government approved laboratories.
FREQUENCY OF TESTING:
The sample of the stone shall be tested once before starting of the work for new quarry
or change in source of supply or in case of doubt.
M-6 MILD STEEL (M.S.)BARS ::
The steel shall be procured by the contractor. The contractor shall make suitable
arrangement for storage of the steel at site. In any circumstances steel produced by re-
rolling mills will not be allowed to use.
The steel shall be confirmed to IS-432 (Part-1):1982. The steel shall be free from loose
mill scale, rust oil, grease or any other harmful matter.
The contractor shall have to procure steel bars directly from manufacturers having BIS
certification or its authorized dealer. The contractor shall have to produced original
voucher/bill (Retail invoice or Tax invoice) for the same along with physical and
chemical test report whenever asked by engineer in charge for the same.
Testing of steel shall be done for each size of bars and one sample for 40.00 M.T. or
less of steel in government or government approved laboratory, to known the physical
properties of steel bars, like nominal mass, 0.2 percentage proof stress / yield stress,
Elongation percentage. Tensile strength, Bend and Rebend test. And chemical test
shall be done one for every ten physical test sample.
For the purpose of payment, the bar shall be measured correct up to 10 mm. in length
and payment shall be made in kg. or in M.T. basis,. And unit weight of bars shall be
computed as per weight given in IS-1786-2008 specification for Indian steel or at the
rate specified below.
TABLE - A (Table-1 page-11 of IS – 1786)
BAR DIA. UNIT WEIGHT BAR DIA. UNIT WEIGHT
In mm. Kg./ Rmt. In mm. Kg./ Rmt
M-7 HIGH YIELD STRENGTH DEFORMED (H. Y. S. D.) STEEL BARS::
The H.Y.S.D. steel shall be procured by the contractor and grade of steel shall be Fe-
415(minimum). The contractor shall make suitable arrangement for storage of the steel
at the site. In any circumstances steel produced by rerolling mils shall not be allowed to
use. The steel shall be either cold twisted or hot rolled or thermo mechanically treated
and shall confirm to IS-1786-2008. The steel shall be free from loose mill scale, rust oil,
grease, or any other harmful matter.
The contractor shall have to procure steel bars directly from manufacturers having BIS
certification or its authorized dealer. The contractor shall have to produce original
voucher / bill (Retail invoice or Tax invoice) for the same along with physical and
chemical test report whenever asked by engineer in charge for the same.
The mechanical properties of the steel shall be as mention below.
TABLE – A (IS-1786-2008)
STRENGTH MECHANICAL PROPERTIES BEND TEST REBEND TEST
GRADE & YIELD TENSILE ELONGAT Up to & Over Up to Over
DESIGNATI STRES STRENGT ION % ON incl. 20mm. & incl. 10mm.
ON S H GUAGE 20mm. dia 10mm. dia.
(YS) (TS) LENGTH dia. dia
Fe415 415 10 % 14.5 Mandrel Mandrel Mandrel Mandrel
Dia=3Φ Dia=4Φ Dia=5Φ Dia=7Φ
the actual mm mm mm mm
Fe500 500 8 % more 12 Mandrel Mandrel Mandrel Mandrel
Dia=4Φ Dia=5Φ Dia=5Φ Dia=7Φ
actual Ys mm mm mm mm
NOTE :: The sample shall be considered to have passed in the bend test if there is no
transverse crack in the bend portion.
The sample shall be considered to have passed in the rebend test if there is no
fracture in the bent portion.
The chemical composition of the steel shall be as mention below:
TABLE – B (IS-1786-2008)
CONSITITUNT PERCENTAGE MAXIMUM PERMISSIBLE
Fe415 Fe500 Fe550 % Max.
Carbon 0.3 0.3 0.3
Phosphorus 0.06 0.055 0.05
Sulphur& Phosphorus 0.11 0.105 0.1
Testing of steel shall be done for each size of bars at the frequency mention in table –
C below or less of steel in government or government approved laboratory, to known
the physical properties of steel bars, like nominal mass, 0.2 percentage proof stress /
yield stress, Elongation percentage, Tensile strength, Bend and Rebend test. And
chemical test shall be done one for every ten physical test sample.
TABLE – C (Table – 5 page-17 of IS – 1786-2008)
FREQUENCY FOR MECHANICAL PROPERTIES, NOMINAL MASS, BEND &
NOMINAL SIZE in mm For Casts/Heats below For casts/Heats over
100 TONNES 100 TONNES.
All sizes 2 per Heat/ cast 3 per Heat/ cast
For the purpose of payment, the bar shall be measured correct up to 10 mm. in length.
Unit weight of bars shall be computed as per weight given in IS-1786-2008.
Specifications for Indian steel or at the rate specified below.
TABLE - D (Table-1 Page-11 of IS 1786)
BAR DIA UNIT WEIGHT BAR DIA UNIT WEIGHT
In mm. Kg./Rmt. In mm. Kg./Rmt.
M-8 THERMO MECHANICALLY TREATED (TMT) STEEL:
The thermo mechanically treated, popularly known as TMT steel shall conform to IS-
1786. The steel shall be procured by the contractor and grade of steel shall be Fe415
(minimum). The contractor shall make suitable arrangement for storage of the steel at
site. In any circumstances steel produced by re-rolling mills shall not be allowed to use.
The steel shall be free from loose mill scale, rust oil, grease, or any other harmful
matter. The contractor shall have to procure steel bars directly from manufacturers
having BIS certification or its authorized dealer. The contractor shall have to produce
original voucher / bill (Retail invoice or Tax Invoice). For the same along with physical
and chemical test report whenever asked by engineer in charge for the same.
The mechanical properties of the steel shall be as mention below.
TABLE – A (IS-1786-2008)
STREN MECHANICAL PROPERTIES BEND TEST REBEND TEST
GTH YIELD TENSILE ELONG Up to & Over Up to & Over
GRAD STRESS STRENGT ATION incl. 20mm. incl. 10mm.
E & (YS) H % ON 20mm. dia 10mm. dia.
DESIG (TS) GUAGE dia. dia
NATIO N/mm2 N/mm2 LENGT ᴓ ᴓ ᴓ ᴓ
Fe415 415 10 % more 14.5 Mandrel Mandrel Mandrel Mandrel
Dia=3Φ Dia=4Φ Dia=5Φ Dia=7Φ
actual Ys mm mm mm mm
Fe500 500 8 % more 12 Mandrel Mandrel Mandrel Mandrel
Dia=4Φ Dia=5Φ Dia=5Φ Dia=7Φ
actual Ys mm mm mm mm
NOTE: The sample shall be considered to have passed in the bend test if there is no
transverse crack in the bent portion. The sample shall be considered to have
passed in the rebend test if there is no fracture in the bent portion.
The chemical composition of the steel shall be as mention below.
TABLE-B (IS-1786-2008)
CONSITITUENT PERCENTAGE MAXIMUM PERMISSIBLE
Fe 415 Fe 500 Fe550 % max
Carbon 0.3 0.3 0.3
Phosphorus 0.06 0.055 0.05
Testing of steel shall be done for each of bars at the frequency mention in table-C
below or less of steel in government or government approved laboratory to known the
physical properties of steel bars, like nominal mass, 0.2 percentage proof stress/yield
stress, Elongation percentage, Tensile strength, Bend and Rebend test. And chemical
test shall be done one for every ten physical test sample.
TABLE-C (Table-5, Page-17 of IS-1786-2008)
FREQUENCY FOR MECHANICAL PROPERTIES, NOMINAL MASS, BEND &
NOMINAL QUANTITY
SIZE IN mm FOR CASTS/BEATS BELOW FOR CASTS/BEATS OVER
100 TONNES TONNES
All sizes 2 per Heat/ cast 3 per Heat/ cast
For the purpose of payment, the bar shall be measured correct up to 10mm in length
Unit weight of bars shall be computed as per weight given in IS-1786-2008.
Specification for Indian steel or at the rate specified below:
TABLE-D (Table-1, Page-11 of IS-1786)
BAR DIA. UNIT WEIGHT BAR DIA. UNIT WEIGHT
In mm Kg / Rmt. In mm Kg / Rmt.
M-9 BINDING WIRE:
The binding wire for tying reinforcement shall be of soft & annealed mild steel
confirming to IS-280. The diameter of wire shall be of 1.63mm or 1.22mm (16 or
gauge). The use of black wire shall be permitted for binding reinforcement bars. It shall
be free from rust, oil paint, grease, loose mill scale or any other undesirable coating
which may prevent adhesion of cement mortar.
M-10 PVC WATER STOP
(a) The PVC water stops shall be fabricated by an extrusion process from an
elastomeric plastic compound, the basic resin of which shall be virgin Polyvinyl
Chloride. No reclaimed Polyvinyl Chloride shall be used.
(b) The compound shall contain any additional resin, plasticizers inhibitors or other
materials, needed to ensure that the finished product shall have the following
physical characteristics as per the CWC specification for PVC seal.
(i) Tensile Strength minimum 116 kg/cm2 (ii)
Ultimate elongation minimum 300%
(iii) Tear resistance minimum 49 kg/cm2
(iv) Stiffness in flexure minimum 24.6 kg/cm2
(v) Accelerated extraction
a) Tensile Strength minimum\ 105 kg/cm2
b) Ultimate elongation minimum 250%
M-11 PVC WATER STRIP
(a) PVC strip in the concrete lining for inducing cracks @ joints.
(a) The transverse and longitudinal PVC (Polyvinyl chloride) strips shall be provided
with the shapes conforming to dimensions shown on the drawing and off white
in colour and mat finish. The finished PVC strips shall be extruded from virgin,
pigmented, plasticized PVC. The PVC strips shall be dense, homogeneous, and free
from holes and other imperfections. The cross-section of the PVC strips shall be
uniform along its length and thickness shall be symmetrical transversely. Tolerance
for dimensions in overall length and width shall be 5% and in thickness 10%. The
PVC strips shall meet the following requirements.
11 Tensile Strength 116 Minimum
Elongation 300 Minimum
Tear Resistance 49 Minimum
Stiffness in Flexure 24.6 Minimum
Accelerated Extraction 105 Minimum
(a) Tensile Strength 250 Minimum
(b) Ultimate Elongation
Effect of Alkali at 7 Days
(a) Weight Increase 0.10 Minimum
(b) Weight Increase 0.10 Minimum
( c) Weight Increase + 5 Minimum
Effect of Alkali at 28 Days
(a) Weight Increase 0.40 Minimum
(b) Weight Increase 0.30 Maximum
( c) Dimension Increase + 15 Minimum
(a) Weight of PVC strip shall be a minimum of 460 g/m for the longitudinal strip
and Minimum of 420 g/m for the transverse strip.
(b) Contractor shall arrange for getting the PVC strips tested in recognized testing
laboratories as approved by the Engineer-in-charge. The contractor shall furnish
test samples of PVC strips in 30 cm length, two samples from each category of
5000 m lot and for additional length of every 5000 m one additional sample to be
tested for same lot. Each sample is obtained and with the number of the reels from
which sample is obtained and with certification that the samples are from the reels to
( c ) It is mandatory for the manufacture of the PVC strips from whom the contractor
shall procure PVC strips, to have a full fledged testing laboratory in the factory to
enable pre dispatch testing of the products as in the event of laboratory test reports
being received after a few weeks, showing substandard values, it would not be
possible to remove the material embedded in concrete. Test reports from
Government laboratories shall also be binding on the manufacturer based on
sample drawn by the Engineer-in-charge and sent for testing to Government
laboratories, from consignments received at site.
( d ) The contractor will get the sample of PVC strip approved by the Engineer-in-
charge. He will furnish the name of manufacture, the details of the in-house testing
arrangements with manufacturer and will also furnish a test report from the in house
testing facilities along with the sample.
Signature of Contractor Executive Engineer
Water Resources Investigation Division
GENERAL SPECIFICATION OF CONCRETE.
GENERAL SPECIFICATION OF CONCRETE
1.0) MATERIALS:
1.1) CEMENT: Specification m-2 of specification of material section shall apply.
1.2) WATER: Specification m-1 of specification of material section shall apply.
1.3) FINE AGGREGATE (SAND): Specification m-3 of specification of material section
1.4) COARSE AGGREGATE: Specification m-4 of specification of material section shall
2.0) SCOPE OF WORK:
The work covered by this chapter consists of furnishing all materials, equipment and
labour for the manufacturing, transporting, placing, finishing and curing of concrete in
the structure included in these specifications and performing all the functions necessary
and ancillary to the work. The item of concrete may be split up into several items
according to the grade of concrete to be used and its location and shall be measured
and paid for accordingly. The general specifications described hereafter shall; however
be relevantly apply to all concrete items.
3.0) COMPOSITION:
Concrete shall be composed of cement, fine aggregate (natural sand), coarse
aggregate, water & admixture (if asked) well mixed in proportion & brought to the
proper consistency. The design mix or nominal mix proportions shall be adjusted to
produce a durable and workable concrete suitable for specified conditions of placement
and design strength.
4.0) PREPARATION FOR PLACING CONCRETE:
Specification laid down in IS-457 shall be applicable. Generally, no concrete shall be
placed until all form works, installation to parts to be embedded and preparation of
surface involved in the placing have been approved. Method of depositing the concrete
shall be subject to approval. All surface of forms and embedded materials that have
become encrusted with dried mortar or grout and from the concrete previously place,
shall be cleaned. The foundation bed and sides shall be carefully cleaned stiff brooms,
picks, jets of water and air applied at high velocity or other effective means, followed by
thorough washing. Before placing of concrete, water shall be removed from depositions
and foundation surface shall be left uniformly damp. All that surfaces shall then be
coated with mortar about 2cms thick in case of rock surface and cement slurry in case
of concrete/masonry surface.
5.0) PLACING OF CONCRETE:
Specification laid down in IS-457 shall be applicable. Placing of concrete shall only be
under taken in presence of authorized representative of engineer in charge. Contractor
shall have to inform department well in advance and in writing , so that necessary
inspection, before placing concrete can be taken over and only after approval of engineer
in charge, placing of concrete can be done. The concrete shall be deposited as nearly
as practicable in its final position to avoid re handling. The concrete shall be placed and
compacted before initial setting of concrete commences and should not be
subsequently disturbed. Method of placing should be such as to preclude segregation.
Care should be taken to avoid displacement of reinforcement or movement of
formwork. As a general guidance, the maximum permissible free fall of concrete may
be taken as 1.50mt. In view of location of concrete work placing of concrete shall be
done by concrete pump if required or another method of placing concrete as approved
by Engineer-in-charge.
6.0) CLASSIFICATION:
For all items of concrete in any portion of the structure or its associated works, shall be
of nominal mix or design mix as specified in specification of item or as decided by
engineer in charge as per provision made in IS-456 Page No-20 cluse-9.3. The cement
concrete works to be carried out are classified in grades as mention in item of work.
Following table is provided for general guidance to the contractor. There may be
change in criteria like water cement ratio, slump, aggregate size and proportion etc, for
which contractor is bound to carry outwork without claiming any extra cost. The cement
level mention in the Table-:AA, given below are tentative and for general guidance only.
The design mix or nominal mix for different grade of concrete to be used will be
furnished by the department.
SR. GRADE OF MSA Min.Avg. Min.Avg. Comp. MIN. CEMENT MAX REMARKS
NO. CONCRETE Comp. Strength Of CEMENT LEVEL .W/C
Strength of 3-Specimen LEVEL REQ. CONSIDER IN RATIO
3-Specimen AT LAB. ON AS PER IS THE S.O.R. PCC
AT FIELD ON 15X15X15 cms. PCC/RCC PCC/RCC /RCC
15X15X15 PRELIMINARY
cms CUBE TEST CUBE
mm kg/cm2 at kg/cm2 at 28 kg/cum kg/cum
NOTES : ( Minimum cement Level will be consider as G.R. NWRWSKD, Gandhinagar MIS/102010/17/K1, Dt.30/07/2018)
1 Concrete works classified as above shall be designed with reference to the field
strength shown in above table. Other requirements shall have to be adjusted to
obtain this strength in each case incl. cement level indicated in above table
2 Compressive strength mention in column no-4 is characteristic compressive
strength given in table-2 based of IS-456-2000.And it is the average
characteristic compressive strength of three specimens.
3 Compressive strength mentioned in column no-5 is based on para-9.2.2 (page
no-22) of IS-456-2000 (The target mean strength of conc. Mix should be equal
to the characteristic strength plus 1.65 times the std. deviation.). Standard
deviation of 3.5 is taken for M-10 & M-15,4.0 is for M-20 & M-25, and 5.0 is for
M-30 as per IS-456, Page-23, Table-8
4 The test result of the sample shall be the average of the strength of three
specimens. The individual variation should not be more than(+)or(-)15
percentage of the average.
5 The characteristic strength compliance requirement mentioned in column No-4
& target mean strength mentioned in column No-5,are based on 'GOOD
QUALITY CONTROL' and MODERATE exposure condition.
6 For every one kg of cement required to be reduced than that of stated in column
No-7 of Table-AA in each case based on approved laboratory design mix /
nominal mix, the recovery shall be made at Rs. 5.45 Per kg. (Basic Rate) of
cement.+ Taxis As Applicable. And for every one kg of cement required to be
added than that of stated in column No-7 of Table-AA, in each case based on
approved laboratory design mix / nominal mix, NO EXTRA payment shall be
7 Curing period shall be 21 days (min.) for O.P.C. /P.P.C. cement.
8 Above details are primarily given for the guidance of contractor while quoting
there tender rate and is only informative for the general requirement of concrete.
7.0) ACCEPTANCE CRITERIA:
i) COMPRESSIVE STRENGTH: The concrete shall be deemed to comply with the
strength requirements when both the following conditions are met.
a) The mean strength determined from any group of four consecutive test results
compiles with the appropriate limits in col-2 of Table-11 given on Page No-30 of IS-456-
b) Any individual test results complies with the appropriate limits in col-3 of Table-11
given on Page No-30 of IS-456-2000.
8.0) PROPORTIONS FOR NOMINAL MIX CONCRETE:
The proportion of materials for nominal mix concrete shall be in accordance with IS -
456 -2000, Page NO-23, Table-9, given in following table.
GRADE TOTAL QUANTITY OF DRY PROPORTION OF FINE QUANTITY
OF AGGREGATE BY MASS PER 50Kg AGGREGATE TO OF WATER
CONCRETE OF CEMENT TO BE TAKEN AS COARSE PER 50Kg
THE SUM OF THE INDIVIDUAL AGGREGATE(BY MASS) OF
MASSES OF FINE AND COARSE CEMENT,
AGGREGATE, (IN Kg) Max Max
M-10 480 GENERALLY 1:2 BUT
M-15 330 SUBJECT TO AN UPPER
M-20 250 LIMIT OF 1:1.5 AND A
NOTE: The proportion of the fine to coarse aggregate should be adjusted from upper
limit to lower limit progressively as the grading of fine aggregates becomes finer and
the maximum size of coarse aggregate becomes larger. Graded coarse aggregate
For an average grading of fine aggregate (that is Zone-II of Table-4 of IS-383),the
proportions shall be 1:1.5,1:2 and 1:2.5 for maximum size of aggregates 10mm, 20mm
and 40mm respectively.
Nominal mix shall be carried out at field laboratory or in government
laboratory/ Govt. Approved Laboratory, in case of field laboratory facility not available.
In such case, the charges of the same shall be borne by the department.
The details are further tabulated in the table below.
( IS - 456-2000 PAGE No-23 Clauses 9.3 and 9.3.1 )
GRA MSA TOTAL WEIGHT OF WEIGHT OF Cement WATER- CEMENT PER
COARSE FINE CEMENT ONE cum OF
OF mm AGGREGATE( AGGREGATE AGGREGATE RATIO CONCRETE
CRET E) BY MASS
M-10 20 480Kg 320Kg 160Kg 50Kg NOT 220Kg
40 480Kg 343Kg 137Kg 50Kg MORE 205Kg
M-15 20 330Kg 220Kg 110Kg 50Kg NOT 300Kg
40 330Kg 235Kg 95Kg 50Kg MORE 280Kg
M-20 20 250Kg 166Kg 84Kg 50Kg NOT 360Kg
40 250Kg 178Kg 72Kg 50Kg MORE 330Kg
For the concrete M-10, Hand Broken metal, MSA-63 mm. Cement level (Column-8) in
above table may be considered as 200kg./ Cum
NOTE :1.FINE AGGREGATE(SAND) SHALL CONFIRM TO ZONE-II OF TABLE-4 OF
IS-383(FM 2.21 TO 3.37)2.GRADED COARSE AGGREGATE SHALL BE
USED. FOLLOWING DATA ARE FOR GENERAL GUIDANCE ONLY.
MSA PROPORTION OF COARSE AGGREGATE IN %
For 63 mm. MSA proportion of graded coarse aggregate may be considered as the
same for 80 mm.
3.PRELIMINARY TEST CUBES OF SIZE 15X15X15cms SHALL BE CASTED AND
TESTED FOR 7 Days AND 28 Days WELL BEFORE STARTING OF ACTUAL
WORK4.MIX DESIGN IS NOT NECESSARY FOR NOMINAL MIX.
9.0) DESIGN MIX CONCRETE:
The design mix shall be design to produce the grade of concrete having the required
workability and a characteristic strength and target mean strength not less than
appropriate values given in table-AA column-4 & 5 respectively. Mix design done earlier
not prior to one year may be considered adequate for later work provided there is no
change in source and quality of the materials. The design mix shall be carried out in
Govt. laboratory (GERI) / Govt. Approved Laboratory at the cost of the department and
as per prevailing norms as per IS-10262.
10.0) FORMS FOR CONCRETE:
IS-457 shall be applicable.
The forms for concrete work shall have sufficient strength and rigidity to hold and to
with stand the pressure of fresh concrete during compaction, incl. live load and shaped
to the required line within the tolerance specified. The tolerances specified are for
finished concrete surface and not for the forms. For further details regarding design,
details, etc reference may be made to IS-14687.As far as possible; the forms shall be of
steel material. The supports shall be so arranged to keep the maximum deflection
within 1/360 of the span. Suitable devices shall be used to hold corners, adjacent ends
of panels of other forms together in accurate alignment, during compaction of concrete
by vibrator or other means. The forms and their joints shall be tight enough to prevent
loss of mortar or water from concrete while vibrating The contractor shall prepare detail
design and drawings for the execution of formwork, centering, support system and
temporary works as per IS requirement and shall have to submit well in advance for
approval to the engineer in charge The contractor shall be responsible and liable to pay
all claims and compensation arising from any loss or damage to life and property due to
any deficiency, failure of centering or the temporary works.
ii) FORM SHEATHING OR LINING:
In general, forms for permanently exposed surface shall consist of or shall be lined with
steel plate metal or with water resistant plywood or wooden sheathing of lining shall be
so treated or coated that there will be no chemical deterioration of formed concrete
surface. The forms shall able to withstand restorations caused by placement and
vibration of concrete and the workmanship used in the form construction shall be such
that formed surface after being treated will confirm to the requirement of these
specifications.
iii) ABSORPTIVE FORM LINING:
Absorptive form lining, where directed to be used, shall be of the type and quality
approved by the engineer in charge The form lining shall be highly absorptive to air and
water and through its absorptive capacity shall be able to eliminate voids, pits and
common defects from concrete and without damage to the surface. The lining itself and
treatment employed in its manufactures shall neither discolour the concrete nor
interfere with normal chemical reaction of the cement. Specification laid down in IS-
457shall be applicable for absorptive form lining.
Embedded metal rods used for holding the forms shall remain embedded and shall
terminate not less than 30mm for MSA-40mm and 50mm for MSA-80mm clear of the
formed faces of concrete. Embedded wire ties for holding forms shall only be permitted.
Specifications laid down in IS-457 shall be applicable.
v) CLEANING AND TREATMENT OF FORMWORK:
Surface of forms shall be kept free from encrustations, mortar, sawdust, chippings etc
that would contaminate the concrete. The surface of formwork in contact with the
concrete shall be cleaned and treated with form release agent approved by engineer in
charge. Release agents should be applied so as to provide a thin uniform coating to the
forms without coating the reinforcement.
vi) ERECTION OF FORMS:
Where forms for continuous surface are placed in successive units, the forms shall fit
tightly over the complete surface, so as to prevent leakage of mortar from the concrete
and to maintain accurate alignment of the surface. Forming of block joints to the
concrete portion shall be done carefully to ensure smooth joints and avoid sharp
deviation, projections or edges and particulars attention shall be paid in setting and
tightening the forms to ensure that the contraction joint's surfaces are in accurate
alignment & plumbs. Specifications laid down in IS-457 shall be applicable.
vii) REMOVAL OF FORMS:
In general specifications laid down in IS-457 and IS-456-2000 shall be applicable.
However, stripping time will be decided by engineer in charge based on minimum
strength to be attained by the concrete for safe removal of forms. Following is for
general guidance only.
a) Concrete not subject to appreciable bending or direct stress or not reliant on forms
for vertical supports. (Vertical face):24 Hrs after final setting or not liable to injury due to
b) Concrete subject to appreciable bending & direct stress & partially reliant on forms
for vertical support:
i) Vertical surfaces, unloaded columns, walls etc: 3 days.
ii) Galleries, arches, loaded columns and walls etc. :10 days.
iii) Roof of floor slabs, walkways, platforms etc: 20 days
iv) Heavily reinforced beams, bridge deck slabs and girder and other heavy sections:
30 to 38 days or as instructed by engineer in charge.
11.0) COMPACTION:
Concrete shall be thoroughly compacted and fully worked around the reinforcement,
around embedded fixtures and into corners of the formwork. Concrete shall be
compacted using mechanical vibrators, over vibration and under vibration of concrete
should be avoided. The stand by vibrator and its accessories shall be kept ready on site
so that it can be used in alternative in breakdown of runner vibrators, in no case
concrete shall be allowed without vibrator. The concrete for chute floor shall be
compacted using mechanical skid vibrator.
12.0) FINISHES AND FINISHING:
Specification laid down in IS-456 & IS-457 shall be applicable. Following table is
provided for general guidance only
TYPE OF TYPE OF SPECIFICATIONS APPLICATION
SURFACE FINISHES
FORMED F1 SURFACE IRREGULARITIES SHALL NOT PERMANENTLY
SURFACE EXCEED 25MM. REQUIRES NO CONCEALED OR
TREATMENT AFTER REMOVAL OF CONCRETE WITH
FORMS EXCEPT DEFECTIVE BACKFILL
-DO- F2 SURFACE IRREGULARITIES SHALL NOT PERMANENTLY
EXCEED 5 MM FOR ABRUPT EXPOSED SURFACES
IRREGULARITIES & 10 MM FOR FOR WHICH OTHER
GRADUAL IRREGULARITIES. FINISHES ARE NOT
-DO- F3 SURFACE ABRUPT IRREGULARITIES STRS PERMANENTLY
SHALL NOT EXCEED 5 MM FOR EXPOSED &
IRREGULARITIES PARALLEL TO THE APPEARANCE IS OF
DIRECTION OF FLOW & 25 MM FOR SPECIAL IMPORTANCE.
IRREGULARITIES IN THE OTHER E.G. PARAPETS,
DIRECTION. GRADUAL SPILLWAY PIERS,
IRREGULARITIES SHALL NOT EXCEED INTERIOR & EXTERIOR
5MM. WALL OF HOIST,
ELEVATOR TOWERS &
OTHER DECORATIVE
-DO- F4 THE SURFACE TREATMENT SHALL WHERE ACCURATE
CONSIST OF THE GRINDING OF ALIGNMENT &
OFFSETS AND BULLDOGS ON A LEVEL EVENNESS OF SURFACE
OF 1 TO 30 RATIO. GRADUAL SURFACE ARE ESSENTIAL FOR
IRREGULARITIES SHALL NOT EXCEED 6 PREVENTION OF
MM. DESTRUCTION OF
RUNNING WATER. E.G.
SPILLWAY FACE, DIVIDE
WALL, INTAKE OF
CANALS, PENSTOCKS
OUTLET FOR CANALS,
ENERGY DISSIPATION
FOR OUTLET WORKS,
UNFORMED U1 SCREED FINISH. SURFACE FIRST STAGE FOR
SURFACE IRREGULARITIES SHALL NOT EXCEED FINISH U2 & U3. ALL
10 MM. CONCRETE FLOOR
TOPPING & SURFACE
-DO- U2 FLOATED FINISH. SURFACE STILLING BASIN, EXPOSE
IRREGULARITIES SHALL NOT EXCEED SURFACE OF GUTTER
-DO- U3 TOWELED FINISH. SURCACE SLAB TO BE COVERED
IRREGULARITIES SHALL NOT EXCEED WITH BUILT UP
5MM. ROOFING, OR
PROOFING & STAIR
13.0) CONCRETING FOR R.C.C. :
Concreting for R.C.C. shall be applicable as per concern IS code considering
amendments there in. It shall also apply general specification of concrete for diaphragm
appended here with.
14.0) CURING AND PROTECTION:
Concrete shall be protected against injury until final acceptance. Unhardened concrete
shall be protected from heavy rains and flowing water. No fire or excessive load shall
be permitted near or indirect contact with the concrete at any time Expose finish surface
of concrete shall be protected from the direct rays of the sun for at least first three days
after placement. Concrete shall be kept continuously moist for 21 days or as instructed
by engineer in charge Curing compound can be utilized for vertical and sloping surface.
If curing compound is to be used, it shall be of approved quality and shall be tested in
the laboratory, at the cost of the contractor or curing shall be done by laying wet jute
15.0) REPAIRS TO CONCRETE:
Repairing of concrete shall be carried out at contractors cost by skilled workers. All
imperfections of the concrete surface shall be corrected to obtain the surface of
concrete that confirm to the Repairs of imperfection in concrete shall be completed
with- in 24 hrs after removal of forms. Concrete with excessive surface depression or
suppression, honeycombed, fractured or other- wise defective concrete shall be
removed and redone at contractors cost. Specification laid down in IS-457 shall be
16.0) BATCHING AND MIXING EQUIPMENTS:
All ingredients of the concrete should be used by mass only except water. Batching
shall be done either by automatic computerized/electronic weigh batcher or by
mechanical weigh batcher attached with concrete mixer each size of aggregate & sand
shall be weighed separately. Self-loading self-batching mobile concrete mixer shall be
used so that weigh batch of material shall be done. In the even at break down of weigh
batch plant mixer as shown above the conventional mixer shall be allowed on prior
approval for the limited time period. The equipment and its operation shall at all times
be subject to the approval of engineer in charge. Calibration of weigh batching shall be
done periodically. Steel measuring boxes of adjustable bottom shall only be allowed
in special circumstances, for very small quantity of concrete and subjected to prior
written permission of engineer in charge.
Specification laid down in IS-457 shall be applicable. The mixing of concrete shall be
done in a automatic batch plant of such approved type as will ensure the homogeneous
mixing of ingredients. The ingredients shall be fed into the mixer simultaneously. A
small portion (5 to 10%) of water be fed first and remaining water shall be added
uniformly and simultaneously when all other materials are in the mixer. Mixing time
shall be generally 2 minutes or as instructed by engineer in charge.
18.0) HANDLING AND CONNVEYING:
Specification laid down in IS-457 shall be applicable. The handling and conveying of
concrete from the mixer to the place of final deposit shall be done as rapidly as
practicable and without any objectionable separation or loss of ingredients. Whenever
the length of haul from the mixing plant to the place of deposit is such that the concrete
unduly compacted or segregates, suitable agitator’s type conveying system shall be
used. Where, concrete is being conveyed on
chutes or on belts, the free fall or drop shall be limited to 1.50mt unless otherwise
permitted. Concrete shall the place within 30 minutes after mixing and by method which
will prevent segregation and loss of ingredients. The distance between the mixer and
place of concreting and also mode of transport of concrete shall be subject to the prior
approval. In view of location of concrete work placing of concrete shall be done by
concrete pump if required or another method of placing of concrete as approved by
engineer-in-charge.
19.0) DEPOSITING CONCRETE UNDER WATER:
Specification laid down in IS-457 shall be applicable. Concrete shall not be deposited
under water, if it is practicable to dewater the area and place the concrete in a regular
manner. If it is found necessary to deposit any concrete under water, the method,
equipment, materials and mix shall first be approved by the engineer in charge.
Concrete shall not be placed in running water.
20.0) QUALITY CONTROL RELATED:
Contractor shall have to provide skilled labourers, materials and facilities for all type of
field and laboratory, quality control tests, Transporting materials and c.c. cubes from
field to laboratories shall have to carried out by the contractors. No extra payment shall
be made for this. The specifications laid down in relevant IS shall be applicable for
method of taking test samples, method of testing and test equipments etc.
i) COMPRESSIVE STRENGTH TEST AND FREQUENCY OF TEST:
The concrete for test specimens for compressive strength shall be collected at random.
The compressive strength test of concrete shall be conducted on 150x150x150mm size
cubes. The frequency of test sample shall be as per IS-457 for massive structures and
components like dams and its related works, canal structures, bridges, and other
massive structures. Generally, not less than one set of sample (six cubes) shall be
taken from approximately each 380 cum or part of it per day per shift per mixer for plain
concrete and from 190 cum or part of it per day per shift per mixer for R.C. concrete for
massive structures as per IS-457. For non massive structures, building and its related
works, canal lining etc, frequency of test shall be as per IS-456-2000.as shown in the
table-DD below.
TABLE –DD AS PER IS-456-2000
QTY OF CONC. IN THE WORK No OF SAMPLE(SET) FOR TEST
51 AND ABOVE 4+1FOR EACH ADDITIONAL 50CUM OR
NOTE: At least one sample shall be taken from each shift, where concrete is produced
at continuous production unit, such as RMC plant. or as instructed by engineer in
charge. The 28 days field and laboratory average compressive strength shall not be
less than that mention in table-AA above.
i) SLUMP TEST :
In order to test the consistency of the mixed concrete, slump test shall be taken as per
PRELIMINARY TEST :
The exact proportions in which the different ingredients are to be used for different parts
of the work shall be determined by the dep't, well before the actual work starts. During
the progress of work, preliminary tests shall be conducted periodically by the
department apart from the field tests, to ascertain the 7 day and 28 day laboratory
compressive strength
ii) OTHER TEST:
Additional tests, if deemed necessary for concrete to determining unit weight & air
content, will also be carried out by the department. The frequency of all the tests
mentioned above shall depend on the nature of job & will be decided by the engineer in
charge. The contractor shall have to provide all necessary facilities and materials etc.
for these tests. No extra payment shall be made for these.
iii) ACCESS TO TESTING :
The contractor or his representative shall have access to and to associate with
sampling and tests of trial mixes, and other field and laboratory tests. It shall be the
responsibility of the contractor to associate himself with the work of test in govt. lab.
And in the field and shall have to sign record. It shall be responsibility of the contractor
to obtain on work, the concrete of quality density and strength corresponding to
laboratory designs.
iv) CHECK TESTS FOR EQUIPMENTS :
The contractor shall provide standard test, weigh and other necessary equipment
required for checking the performance of each scale or other measuring device. The
test shall be made in presence of representative of engineer in charge and frequency of
such tests shall be in general fortnightly or as decided by the engineer in charge.
v) RECORD OF CONCRETING OPERATIONS :
A systematic joint record in the form approved by the engineer in charge shall be
maintained to record the details regarding weighing, number of mixes of concrete,
rejected mixes and locations at which concrete is used.
21.0) ANCHOR IN CONCRETE:
Anchor bolts, rods, structural shapes, plate & bearing required in connection with
installation of gates etc. and other apparatus of the same shall be supplied free of cost
by department and shall be placed, erected and embedded in concrete by the
contractor for which no extra shall be made to facilitate first stage and second stage
concrete. Due care shall be taken to obtain well finished surface after removal of forms,
eliminating the necessity of subsequent repairs The responsibility to maintain level and
position of embedded parts during and after concreting and removal of centering shall
rest with contractor. Full co - operation for the embedment of main anchorage for gate,
horizontal and vertical girders, bottom and side seal girders, track plants, guide rails
etc. and hoisting mechanism inclusive of the shaft arrangement, hoist platform etc. shall
be extended by the contractor.
22.0) UNACCEPTABLE WORK:
All defective concreting work including but not limited to defects arising out of honey
comb without claiming any extra payment. Acceptance criteria will be in accordance
with provisions of IS-456 and IS-457
23.0) MEASUREMENT AND PAYMENT:
Measurement and payment of concrete shall be made on the basis, mentioned in detail
technical specification of respective item of work. No deduction shall be made for the
space occupied by reinforcement and the quantities of all holes & passages greater
than 0.80 sqmt. In cross section or 100 mm in dia. shall however, be deducted from the
quantity for payment. The reinforcement steel and other embedded metal parts shall be
paid separately at the rates accepted as per the schedule of prices. No payment shall,
however, be made for embedding minor fixtures or providing grooves, block outs,
recess etc. for gates and other installation, electric conduits etc. The rates are also
inclusive of erection and removal of formwork and centring.
Signature of Contractor Executive Engineer
Water Resources Investigation Division
GENERAL SPECIFICATION OF EXCAVATION,
CLEARING THE SITE AND
FOUNDATION INCLUDING BLASTING
CLEARING THE SITE AND EXCAVATION
FOR FOUNDATION INCLUDING BLASTING
1.0) SCOPE OF WORK :
The work to be done under this specification shall consist of clearing the site,
excavation in different type of strata as mention in item of works and disposal of
excavated material within lead and lift mention in the item of works. The scope of work
also incl. of furnishing all tools, plants and labour and materials required to carry out
excavation and maintaining the slope of excavated trenches by way of artificial manner
( strutting ) also, if required so.
2.0) CLEARING THE SITE :
The item of clearing site as given below shall be considered as included in the
excavation and shall not be paid for separately, if there is no separate item of work for
this in the tender.
REMOVAL OF RUBBISH:
The area to be occupied under the work shall be made free from rubbish and shall be
cleared of all rocks, stumps, decayed timbers, bush and all other objectionable
DISPOSAL OF WASTE MATERIAL FROM SITE CLEARANCE:
Waste materials decided as such by the engineer, obtain from clearing the site, shall be
burnt or removed as directed by the engineer.
REMOVAL OF LOOSE ROCK ETC.:
Before any work of excavation is taken up, all loose rocks semi detached rock in or
close to the area to be excavated, that is liable to fall or otherwise endanger the work or
workmen shall be stripped. The methods employed shall be such as will not shatter or
render unsuitable and therefore make unsafe the ground that was original sound or
safe. Any material not requiring removal as contemplated herein, but which may latter
become loosened or unsuitable shall be promptly and satisfactorily removed The cost
of such clearing shall be deemed to have been incl. in the rate of different item of
3.0) CLASSIFICATIONS:
The work under excavation shall be divided into item as under
(A) EXCAVATION IN OVERBURDEN:
This shall include all excavation in strata other than soft and hard rocks such as soil,
clay sand soft murrum kankar, hard murrum and boulders or mixture of above strata
through boring rig for diaphragm. Hard murrum and boulders shall include all kinds of
disintegrated rock or shale or indurated sand or conglomerate interspersed with
boulders less than 0.70 cubic meter and larger than 0.03 cubic mt. which do not need
blasting and can be removed by pick bar and shovel.
(B) EXCAVATION IN SOFT ROCK:
This shall include all excavation in strata soft rocks through boring rig for diaphragm
which can removed with a pick bar and shovel by little more force & efforts or with
special equipments required but which do not come under the category of hard Murom
(,C) EXCAVATION IN HARD ROCK:
This shall include all excavation in rock occurring in masses, which can be best
removed by blasting but it also include excavation through boring rig for diaphragm.
This shall also include rock required to be removed by chiseling rock breaker etc when
blasting is not permitted.
The pay line shall be sloping as 1:1 (H:V) in overburden, 0.50:1 (H:V) in soft rock and
0.25:1 (H:V) in hard rock as the case as per the item of work.
a) When actual depth of foundation is taken lower than proposed foundation levels, the
pay line shall be the line starting from the limiting lines of structure at actual
foundation level & sloping at the rate specified above.
b) When actual depth of foundation is taken above than proposed foundation levels, the
pay line shall be the line confirmed to appropriate slopes excavated on the basis of
width required for proposed foundation levels, but ending at the level of actual
c) No payment shall be made for work done beyond the specified pay line, mentioned
d) The contractor shall, however, be permitted to excavate at flatter slopes in the
interest of stability and safety of work without any extra cost if site condition permit so
e) In the event of actual line of excavation being steeper than that specified under pay
line above, payment shall be made for actual line of excavation only.
f) Over cut beyond specified pay line of excavation carried out by the contractor for any
purpose or reasons, unless at the specified direction of engineer in charge, shall be at
the expense of the contractor. Refilling required of such unauthorized excavation with
suitable materials, as directed by the engineer shall also be done by the contractor at
5.0) SHORING AND STRUTTING:
Any shoring and strutting that may be required during excavation and progress of work
shall be deemed to be covered in the rate quoted for the respective item of work.
6.0) SLIPS: GOVERNMENT NOT RESPONSIBLE:
The contractor shall be bound to take necessary precautions to avoid any slips. But if
any slip occurs on account of any reasons, no claims shall be entertained for such slips
and their consequences and the excavation shall be properly restored to stability for
design & drawings of diaphragm.
7.0) DISPOSAL OF EXCAVATED MATERIALS:
The excavated material shall be disposed of within specified lead and lift mentioned in
the respective item of work and manner as directed by engineer. Any useful materials
what's so ever, shall be stacked separately and in the manner, as directed by engineer-
in-charge. The directions of engineer in charge shall be binding in respect of location
and manner for disposing off the waste and stack of useful materials within specified
lead and lift mentioned in the respective item of work.
8.0) FINAL FINISHED SURFACE OF FOUNDATION:
After rough excavation through boring rig for diaphragm to the required depth is
completed, scaling & trimming of all loosen rock shall be carried out by chisels and
wedges or by suitable equipments. All weathered or partly decomposed pieces of rock
remaining in foundations, shall be removed. Areas of low bearing capacity, steep,
inclined seams, fauls & crushed zones in an otherwise good foundation, if permitted to
be kept, shall be cleaned off to a stuffiest depth before starting masonry or concrete.
Where seams, joints, cavities or other defect are found in an otherwise satisfactory
foundation, such defects shall be corrected by excavation of open trenches to the lines,
depth and dimensions as directed by the engineer in charge. The surface shall be
rough, free from steps, angle and the edges of benches shall be chamfered
approximately at 45 degree. While preparing the foundation, it will be seen that neither
along the length of the dam nor across shall the foundation have slopes exceeding
angle of internal friction on rock and masonry. The finally finished foundation surface
shall be tested by striking with a 7/8 pound hammer. If any loose portion of foundation
is revealed by a hollow sound, the same shall be removed by wedging, chiseling etc. till
a good clear ringing sound (for the case of hard rock strata) is obtain from the rock or
as decided by engineer in charge.
9.0) MODE OF MEASUREMENT AND PAYMENT:
For the purpose of measurement, initial and final levels in grid of not more than 5x5 mt.
shall be taken by cross section method with levels at each corner. The rate shall be for
the respective excavation incl. necessary lead & lift and disposal of excavated stuff as
directed and dewatering, if any. No payment shall be made for any silt, debris etc that
might accumulate in excavated areas on any account. Removal of such, thereof shall
be deemed to have been incl. in the tendered rate for the respective item of work. No
extra claim shall be entertained for any excavation in overburden and rock, below
those, shown in drawing or instructed. The rates of the respective item of work are
inclusive of all lead and lead specified thereof.
10.0) BLASTING:
In conducting blasting operations, proper precautions shall be taken for the protection
of persons, the work and property. All prevailing government laws and rules relating to
the design and location of magazine, transport and handling of explosives &other
measures enacted for prevention of accidents shall be strictly observed. Warning
signals shall be prominently displayed on all magazines. Similar proper warning signals
shall be given before actual blasting.
1) STORING OF EXPLOSIVE:
Explosives shall be stored in a safe place and at a safe distance from the work and
under the special care of watchman as per rules, so that in case of accidents no
damage occurs to other part of the work. Explosive detonators and fuses shall be
stored separately. No objections certificate from the District Magistrate or Inspector of
Explosives, Gujarat, shall be obtained by the contractor as required.
2) RESTRICTION ON BLASTING:
a. No blasting which may disturb or endanger the stability, safety or quality of the
foundation shall be permitted.
b. Blasting within 15 m. of masonry work in progress or a permanent structure, shall not
c. Progressive blasting shall be limited to the one third of the total remaining depth of
d. Blasting limit shall be 30 m. for heavy blasting & 15 m. for light blasting with shallow
e. No large scale blasting operation shall be resorted to when the foundation excavation
reaches the last 0.75 to 1.0 m. Only small charges, preferably of small size
gelatin/black gun powered may be allowed, so as to prevent shattering of the
f. In order to have periodic review, it would be almost necessary to excavate the
foundation in limit depth or one meter after three meter excavation from the surface
after three meter excavation from the surface use of ammonium nitrate must be
dispensed with.
11.0) RULES FOR BLASTING OPERATIONS:
The contractor shall acquaint himself with all the prevailing laws and rules & regulations
concerning storing, handling and the use of explosives. All such laws, regulations&
rules etc. as in force from time to time shall be binding upon the contractor.
i) All materials such as explosives, detonators, fuses, tamping, materials etc. that are
proposed to be used in the blasting operations shall have prior approval of the engineer
ii) Black powder and safe explosive shall be used wherever possible. Explosive with
nitroglycerin shall be used only under exceptional circumstances& where the above
explosives are ineffective.
iii) The use of fuse with only one protective coat is prohibited.
I) Excavation by blasting will be permitted only under personal supervision of competent
and licensed persons and trained workmen.
ii) All supervisors and workmen in charge of makeup, handling, storage and blasting
work shall be adequately insured by the contractors.
iii) The storage shall be in charge of very reliable persons. The contractor shall have to
produce a security for the person in charge of the explosives if and as required by the
civil authorities of the district.
iv) The contractor shall make sure that his supervisors and workmen are fully
conversant with all the rules to be observed in storing, handling, and use of explosives.
It shall be ensured that the supervisor in charge is thoroughly acquainted with all the
d. PROCUREMENT:
I) The contractor will be the sole responsible for procurement of explosive.
ii) The contractor shall, if required by him, build a magazine or bring portable one for
storing the explosive.
iii) A careful & day to day account of the use of explosive shall be kept by the contractor
in an approved register and approved manner.
iv) The magazine shall at all times be kept scrupulously clean. All the rules and
regulations under explosive law for magazine management, maintenance, handling and
safety shall be followed.
v) Notice shall be hung near the store prohibiting entrance of unauthorized persons
e. USE OF EXPLOSIVE:
For the transport of explosives and detonators, closed and strong container made of
soft materials such as timber, copper, lather etc. and like materials shall be used
confirming the latest provision under handling, transportation and use of explosive rules
and regulations. Latest provisions under explosive rules and regulations shall be
followed for the use of explosives.
f. CHARGING OF HOLES:
i) The work of charging shall not commence before all the drilling work at the site is
completed and the supervisor has satisfied himself to that effect by actual inspection.
ii) While charging open lamps shall be kept away. For charging with powered
explosives, naked flame shall not be allowed.
iii) Only wooden tamping rods without any kind of metal on them shall be allowed to be
iv) Bore holes must be of such a size that the cartridges can easily pass down them.
v) Only one cartridge shall be inserted at a time and gently pressed into the hole with
the tamping rod. The sand, clay or other tamping material used for filling the holes
completely shall not be tamped too hard.
Blasting shall only be carried out during fixed hours of the day time after prior written
approval of engineer in charge.
ii) The site of blasting shall be prominently demarcated by red danger flags. A sirens
with a range of one km radius shall be utilized for warning. All the labours work
immediately get safe shelters.
iii) All the roads and footpaths etc. leading to blasting shall be detached.
vi) Blasting shall be carried out in such a way, so as not to disturbed the banks of the
canals & its structures, Dam structures, other surrounding structures etc.
12.0) ELECTRICAL FIRING:
i) Only the supervisor in charge shall keep the key of the firing apparatus.
ii) Special apparatus shall be used as the source of current for blasting.
iii) All the detonations shall be checked before use.
iv) For blasting in one series, only detonators of the same manufacture and of the
same group of electrical resistance shall be used.
v) Such of the electric lines, shall be removed from the site.
vi) The use of earth as a return line shall not be permitted.
vii) The firing cable shall have a proper insulation cover.
viii) Before firing, the circuit shall be checked by a suitable apparatus.
ix ) After firing, the source of current shall be cut off before any persons are
allowed to leave the shelter.
x) During storms, charging with electrical detonators shall be suspended.
13.0) PRECAUTIONS AFTER BLASTING:
i) After the blast, the supervisor shall carefully inspect the work and satisfy himself that
all charges have exploded.
ii) For underground work, the workmen shall only be allowed to go to face after toxic
gases got evacuated.
14.0) MISFIRING:
i) If it is suspected that part of the blast has failed to fire or is delayed, sufficient time
shall be allowed to lapse before entering the danger zone.
ii) Neither drilling near the holes that have misfired, nor redrilling the hole shall be
iii) The supervisor of the blasting operation shall have to report to the office regarding
all cases of misfire, the cause of misfire and steps taken in connection therewith.
15.0 LIGHT AND CONTROLLED BLASTING:
Where heavy or wet blasting operations are prohibited or are not practicable,
excavation in hard rock / bhat rock strata shall only be carried out using light and
controlled blasting technique under strict supervision of expertised persons and
department. All the specifications and precautions mentioned above shall be applicable
16.0 EXCAVATION BY USING MECHANICAL HAMMER / ROCK BREAKER/
PNEUMETIC DRILLS:
Where heavy or wet blasting and light & controlled blasting operations are prohibited or
are not practicable, excavation in hard rock/bhat rock strata shall only be carried out by
using mechanical hammer / rock breaker or pneumatic drills or by manual chiseling
using crowbars, pickaxes etc for the excavation of diaphragm.
17.0 RECOVERY OF HARD ROCK AVAILABLE FROM EXCAVATION:
As per Govt. of Gujarat N.W.R.W.S. and Kalasar Dept. Order No. MI Cell /102010 /17
/(2) K-1, Dt.21/01/2014, for the hard rock, which is excavated from the work will be
allotted to the agency. The amount will be recovered at the rate (i The amount will be
recovered at the rate Rs. 224.08 per Cum excluding GST(As per R&B SOR 2024-
25).In addition, necessary royalty for these materials have to paid by the agency as per
prevailing rules and regulation to the Industries & Mines Dept. according to
classification of materials.
Recovery of hard rock shall not be made for excavation in hard rock by boring
rigs or any other such special equipment utilized for excavation of diaphragm
The quantity will be calculated as per instruction of Engineer-in-charge. This fact should
be kept in mind while quoting the tender rates of these items.
Signature of Contractor Executive Engineer
Water Resources Investigation Division
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