minutes of pre-bid meeting / clarifications all hydro ... · end vertical girders, wheel assemblies...

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SJVN Ltd.

Dated: 17/10/2017

ARUN-3 HYDROELECTRIC PROJECT (900 MW)

MINUTES OF PRE-BID MEETING / CLARIFICATIONS

All Hydro-mechanical Works including Pressure Shaft Steel Liner of Arun-3 HEP, Sankhwasabha Distt. of Nepal. (DCB-CCD-AHEP-HM-419-01).

Employer : SAPDC

Country : NEPAL

(This Document is meant for the exclusive purpose of bidding against this package and shall not be transferred, reproduced or otherwise used for purposes other than that for which it is specifically issued.)

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Minutes of Pre-bid meeting / Clarifications to the Bidders’ Queries Sr. No

Clause No. Provision in Bid Documents Summary of Bidders’ Query / Modification requested

Response/ Comments

Vol-I, Section – I, Press Notice, NIT

1. Clause No. 9.2 (a) : Technical Experience Criteria

(a) Gates:

At least one number Radial Gate having value of Ax H not less than 3260 m3. Where, A= Area of gate (width x ; height of gate opening) expressed in sq.m, H= Head at bottom of the gate leaf in (m).

(a) Gates :

At least one number Radial Gate having value of A x H not less than 2550 m3. Where, A= Area of gate (width x height of gate opening) expressed in sq.m, H= Head at bottom of the gate leaf in (m).

Existing provision shall prevail.

2. Clause 12 - Key Particulars / details and dates

Deadline for submission of bids :

1. Online submission 25/10/17 (1300 Hrs.)

2. Offline submission 01/11/17(1800 Hrs.)

Date & time for Bid opening.

Envelope-I: Online bid opening 26/10/17 (1400 Hrs.)

Envelope-II : To be intimated later on to the bidders meeting the specified qualifying criteria and also whose Techno-Commercial Bids are found responsive.

In present circumstances and moreover due to consecutive Puja holidays in September/October 2017 , request to kindly extend the due date of submission till 25.11.2017 instead of 25.10.2017

Please refer sr. nos. 10 & 11 of Corrigendum / Addendum no. 3.

3. Clause 12 - Key Particulars / details and dates

In view of the exhaustive work involved and our other commitments current workload we request extension as under: 1.online submission date : 25.01.2018

2.offline submission dale: 01.02.2018

4. Clause 2 (9C) of IFB (Scope of Work) & Clause 1.2.9 C of TS

Two sets of slide gate suitable for a clear vent opening of size 5500mm x 7500mm (wxh) with skin plate, main horizontal girders, end vertical girders, stiffeners, Aluminium Bronze slide/thrust pads with base, rubber seals with seal bases for top, side and bottom, ferrules, seal clamp plates with stainless steel fixing nuts and bolts, guide shoes, lifting arrangement, latching arrangement, ballast (if required), 2nos.

Please clarify and elaborate as to the details of "Grating with Wire Mesh etc" for Surge Shaft Gate.

In addition to steel grating, the wire mesh is provided at the bottom of grating to avoid the falling of tools, nut & bolts etc. during maintenance.

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Response/ Comments

filling valves, grating with wire mesh etc., complete in all respects.

5. Clause 2 (10C) of IFB (Scope of Work) & Clause 1.2.10 C of TS

Four sets of vertical lift wheeled gate suitable for a clear vent opening of size 5000mm x 5500mm (wxh) with skin plate, main horizontal girders, vertical stiffeners, end vertical girders, wheel assemblies with self aligned stainless steel spherical roller bearings, wheel cut-out arrangement, wheel axle/pins, rubber seals with base for sides, top and bottom, ferrules, seal clamp plates with stainless steel fixing nuts and bolts, side guide shoes, lifting arrangement, 2 nos. filling valves, latching arrangement, strike bracket for MIV interlock switch, ballast (if required), grating with wire mesh etc., complete in all respects.

Please clarify and elaborate as to the details of "Grating with Wire Mesh etc" for Draft Tube Gate.

Also please clarify and elaborate what is meant by 'Wheel cut-out arrangement' for wheeled gates.

In addition to steel grating, the wire mesh is provided at the bottom of grating to avoid the falling of tools, nut & bolts etc. during maintenance.

The wheel cut out arrangement, is clearly shown in the specification drawings.

6. Clause 8.0 - Construction Power

In case the Contractor fails to avail electricity connection from NEA/Employer due to invalid reasons within 3 months from date of intimation of completion of transmission line then the recovery of charges @ 11 NPR/ KWH shall commence from the end of 3 months of such notification of Employer.

Para 1 & Para 2 are conflicting in nature. If availing power from grid becomes mandatory, then how adjustment will be made when grid power is not available and contractor is required to make good the deficit by running its DG Sets. Further, if the contractor does not avail of the electricity connection facility from NEA/Employer in three months from the date of intimation of grid power availability, on what basis recovery of charges shall be effected since there is NIL units consumed by the contractor. Please also confirm that grid power made available to the contractor shall


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Response/ Comments

be 415V AC. The above clause should be re-visited by the Employer and discretion of power utilization shall be left with the contractor as per its economy.

7. Clause 9.0 iii - Availability Of Land To The Contractor:

Land for Infrastructure shall be arranged by the Contractor himself at his own cost.

It would not be practicable for the contractor to arrange land by himself. Hence Employer's direct involvement and assistance is necessary. Alternatively, Employer can arrange the land and provide to the contractor during the pendency of the contract.


8. Clause 9.0 iii - Availability Of Land To The Contractor:

Land for Infrastructure shall be arranged by the Contractor himself at his own cost.

The land will be provided to the Contractor for the construction of the project.


Vol-2, Section – 2, ITB

9. Clause 5.5.1.2 – Technical Experience Criteria

e) Pressure shaft Steel liner Fabrication/manufacturing, erection, testing and commissioning of one no. pressure shaft steel liner having a value of D x H not less than 1000 m2 Where, D= Internal diameter expressed in m and H= maximum Design Head in (m).

Earlier the Penstocks/Pressure Shaft Steel liners constituted part of civil package.

We therefore request that Qualifying Requirements be amended and DxH≥ 675 m2 for completed work and DxH≥ 1000 m2 for work in hand be made admissible to meet the Qualifying Requirements.


10. Clause 5.5.1.2, Clause 6.1 – Nature of Bidders

The Bidder should either be a single entity or a JV/ consortium formed for participating in the tendering for this Project. Subject to sub-clause 6.2, the bidder (single entity)

Both clause 6.1 and 6.2 do not allow induction of JV Partner or Manufacturer or Subcontractor to meet specific experience criteria 5.5.1.2 (e) of Pressure Shaft Steel


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shall be allowed to associate Manufacturer(s) for certain components in which he does not have the requisite experience.

The Bidder himself or lead Partner to fully meet the following:

Specific experience criteria specified in para 5.5.1.2 (a) and 5.5.1.2 (e).

Liner. Letter of Comfort or authorization for Hydraulic Hoists, Rope Drum Hoist/Gantry Crane and TRCM are always available from multiple manufacturers to all intending bidders. However, as per said clause, there is no avenue open to meet shortfall if any in meeting the specific criteria for Pressure Shaft Steel Liners. The provisions may please be suitably amended to allow a JV Partner / Manufacturer / Subcontractor satisfying specific experience criteria 5.5.1.2 (e) for Pressure Shaft Steel Liners for participation WITH ONE/SINGLE BIDDER ONLY.

11. Clause 5.5.1.2 – Technical Experience Criteria

Applicant either itself or proposed Manufacturer(s), who have given authorization to the Applicant, should have experience in the design, procurement fabrication, shop assembly, painting, shop testing, supply, transportation, erection, testing and commissioning of the following Hydro-Mechanical works and pressure shaft steel liner works in a completed project during the preceding twenty (20) years to be reckoned from the last day of month previous to the month in which applications are invited.

e) Pressure shaft Steel liner

Fabrication/manufacturing, erection, testing and commissioning of one no. pressure shaft steel liner having a value of D x H not less than 1000 m2 Where, D= Internal diameter expressed in m

The first para of Clause 9.2 and 5.5.1.2 clearly specify the inclusion of various activities from “design to commissioning” for meeting the technical criteria for each of the items given vide sub clauses a) to e). Additionally, a clear and explicit mention of the same is given vide sub clauses b), c) d).

However, the same is missing in entirety for sub-Clause a) i) Radial Gate, a) ii) Vertical Lift Fixed wheel /Slide Gate/ Stoplog and missing for “desing” for Sub-Clause e i.e. Pressure Shaft Steel Liner.

While by virtue of the mention vide first para of Clauses mentioned vide Sr. No. a), it

5.5.1.2 Technical Criteria (Specific Experience) is self explanatory, however, the same is again clarified below:

For Clause No. 5.5.1.2, a) and b) the requirement is for "design, procurement, fabrication, shop assembly, painting, shop testing, supply transportation, erection, testing and commissioning".

For Clause No. 5.5.1.2 c), the requirement is for "fabrication/ manufacturing, erection, testing and commissioning".

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and H= maximum Design Head in (m). stands implied for the sub-clause mentioned vide Sr. No. b) above, we request the clarification for requirement of “design to commissioning for Radial Gates & Vertical Lift Fixed wheel/Slide Gate / Stoplog” and “design” for Pressure Shaft Steel Liner and in case required, the same to be made explicit for the sake of clarity and consistency in line with as mentioned elsewhere.

12. Clause 6.2 : Bids with Manufacturer(s)

(ii) The number of Manufacturer(s) not to exceed two (2) for meeting the specific experience criteria. (iii) The Bidders can propose the subcontractor(s)/ Manufacturer(s) for 'Specific Experience', under para 5.5.1.2 (b) or 5.5.1.2 (c) or 5.5.1.2 (d). (vii) Manufacturer(s) shall submit Performance Bank Guarantee equivalent to 5% of value of Work sublet in addition to the Performance Bank Guarantee for whole contract submitted by the Bidders on award of Work.

Hydraulic cylinders / TRCM manufacturers are proposed vendors / Suppliers / Sub-Vendors only and they will enter JDU with bidder at the time of submission of tender. Hence the proposed vendors/ Supplier/Sub-Vendors need not submit performance bank guarantee equivalent to 5% of sublet work. In view of the above, it is requested to delete CL. No. 6.2 (vii).

Please refer sr. no. 6 of Corrigendum / Addendum no. 3.

13. Clause 8.1(a) & (b) : Site visit

The bidders in their own interest, should inspect and examine the site and its surroundings and satisfy themselves, before submitting their bid, in respect of the site conditions including but not restricted to the following which may influence or affect the Works or cost thereof under the Contract:

Availability of Land Contract being executed within Nepal , arranging required land for project purpose will be much difficult, thus request same may please be arranged by Project Authority which will be handed over on completion of project.


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a) Site conditions including access to the Site, existing and required roads and other means of transport/ communication for use by them in connection with the Works;

b) Requirement and availability of land and other facilities, for their enabling works, colonies, stores and workshops etc. Such land shall be arranged by the Contractor at his own cost,

Access road to project site Generally, HM Contractor are not properly equipped with road making plants and machineries, thus same requested to be arranged by project authority with the help of Civil work Agency as normally made in such project.

14. Clause 16 : Currency of Bid

16: 1 The unit rates and prices can be quoted by the bidders separately in the following currencies: a) In Nepalese Rupees for those inputs to the Works which the bidder expects to supply from within the Employer's country, and

b) In Indian Rupees for those inputs to the Works which the bidder expects to supply from outside the Employer's country. (referred to as "the foreign currency requirements").

The supply of pressure shaft liner &. -Hydraulic Cylinders to be procured from 3rd countries (other than India and Nepal). In such case we request you to clarify whether the 3rd country currency can be quoted in Price Schedules.


15. Clause 21.2 (b): Online Submission

Envelope –I Bid (Qualification Particulars and Techno-commercial Bid) shall contain the following :

b) AIL Data Sheets, duly completed except Data Sheet 5& 6.

As per the Cl. No. 21.2 (b), you have indicated Data Sheet-5 & 6 are not to be uploaded in the Envelope-I: Techno-Commercial Bid. Where as in Vol - 7: Data Sheets, Data Sheet 6 is not available in the tender document.


16. Clause 21:3(b) – Online

Envelope-II (Price Bid) shall contain the following :

Price bids are not available in web portal. Price schedule is available on the e-portal, sjvn.abcprocure.com.

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Submission

b) The Price Bid duly filled in electronic form in conformity with the tender specification on the portal only.

17. Clause 29 : Conversion to Single Currency for evaluation of Bids

29.1 For evaluating the price bids, the Employer will convert the amount quoted in various currencies in which the Bid Price is payable to the currency of the Employer's country using the exchange rate stated in the Bid data.

As per the-CL- No. 29, you have indicated that the conversion to single currency will be based on the exchange rate stated in the Bid data. Where as in the Bid data, the details are not available.


18. Application Form 2: General Experience Record

1. Average Annual Turnover

Financial Year 2016 2017 is under preparation and Audit there upon. We request you to confirm, whether we can consider the average annual turnover of 3 years (i.e., 2013-14 to 2015-16) from audited financials.


Vol-3, Section – 3, GCC

19. Clause 14 Taxes and Duties

If any tax exemptions, reductions, allowances or privileges may be available to the Contractor in the country where the Site is located, the Employer shall use its best endeavours to enable the Contractor to benefit from any such tax savings to the maximum allowable extent

Exemption! concessions available for the Projects in Nepal and India

Bidder is requested to ascertain the same from concerned authorities.

20. Clause 14 Taxes and Duties

The Contractor shall bear and pay all taxes, duties, levies and charges assessed on the Contractor, its Subcontractors or their employees by all municipal, state or national government authorities in connection with

Any specific requirement w.r.t Tax Invoices for the Erections and Supplies

Bidder is requested to ascertain the same from concerned authorities.

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the Facilities in and outside of the country where the Site is located.

The quoted bid price (both Supply and Service portion) shall include all duties, taxes etc. The details of loading of Taxes in the bid shall be provided under Data Sheet-6to adjust the Change in Laws and regulations regarding taxes if required in future.

21. Clause 18.1 (Contractors Organization) & 18.2 (Program of Performance)

18.1 Contractor’s Organization

The Contractor shall supply to the Employer and the EIC a chart showing the proposed organization to be established by the Contractor for carrying out work on the Facilities within twenty-one (21) days of the Effective Date.

18.2 Program of Performance Within twenty-eight (28) days after the Effective Date, the Contractor shall submit to the EIC a detailed program of performance of the Contract.

As per clause 18.1 & 18.2 Contractor’s Organisation Chart to be submitted within 21 days of effective date and Programme of Performance to be submitted within 28 days after effecting date.

Whereas in Data sheet 2, Site organisation chart, and in Data Sheet 3 Erection programme has been asked to be submitted along with Bid. Please confirm your actual requirement to be submitted along with bid documents.

Existing provision shall prevail. The Bidder is required to submit Data Sheets as stipulated in the bid document.

22. Clause 19.1 Subcontracting

The Appendix to the Contract Agreement titled List of suppliers for Major Items of Plant Installation Services specifies major items of supply or services along with list of Subcontractors/ manufacturers.

The required capacity & stroke for radial gate cylinder is substantially high and very critical for operation of Radial Gates for the project. Kindly amend the technical specification at various clauses in the document specific to details on Hydraulic Hoist Systems to be supplied for the project specific to Hydro mechanical package.


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23. Clause 21.4 Customs Clearance

The Contractor shall, at its own expense, handle all imported materials and Contractor’s Equipment at the point(s) of import and shall handle any formalities for customs clearance, subject to the Employer’s obligations under GC Sub-Clause 14.2, provided that if applicable laws or regulations require any application or act to be made by or in the name of the Employer, the Employer shall take all necessary steps to comply with such laws or regulations.

Employer's Obligations as per Clause 14.2 of GC has been referred in 21.4 of GCC- Custom Clearance, but there clause 14.2 has been mentioned deleted. Please clarify

The provisions of bid document are clear and shall prevail.

24. Clause 26.2 Completion Time Guarantee

If the Contractor fails to attain Completion of the Facilities or any part thereof within the Time for Completion or any extension thereof under GC Clause 40, the Contractor shall pay to the Employer liquidated damages in the amount computed @ 0.05% of the Contract Price per day of delay per milestone.

Request liquidated damage per day of delay of Mile stone to be of contract price of the item remains incomplete and limited to 5% of Contract value of item remained incomplete as accepted normally in such tender.


25. Clause 37 Force Majeure

Force Majeure” shall mean any event beyond the reasonable control of the Employer or of the Contractor, as the case may be, and which is unavoidable notwithstanding the reasonable care of the Party affected.

Due to project location in remote place and near to border area of Nepal and India, Force Majeure should also include frequent local disturbances, unrest etc, and affecting work progress.


Vol-3, Section – 4, Contract Forms

26. clause (i),Appendix 1

The bank Guarantee for the advance payment shall be in favour of the SAPDC

Interest rate has been revised downward several times during last two years as per


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(Terms and Procedures of Payment)

from a Bank acceptable to the Employer. The advance shall bear a simple interest at the rate:-For NPR & Foreign Currency (INR); 11.30% based on SBI India, MCLR published on 01/07/2016 which includes 200 points on MCLR.

RBI Guidelines. Hence 11.30% interest on 10% Advance is too high considering present market rate of scheduled bank interest rate. Therefore, the same should be re-visited and reduced to a reasonable level.

27. clause(ii),Appendix 1 (Terms and Procedures of Payment)

ii) On despatch of Plant from Manufacturer's works:

Up to ninety percent 80% of the contract price of Ex-works component of Plant for each identified equipment upon dispatch of equipment from manufacture's works on pro-rata basis shall be paid as progressive payment within thirty (30) days on production of the following in bound folders:

Payment Towards progressive supply on despatch of plant form manufacturer’s work in Sl.(ii) payment to be up to 90% as stated but in figure same shown as 80% which appears to be typographical error - please confirm.

Towards erection service payment in Sl. 10(iii) payment to be 90% as stated but in 4th line of the para same stated 80% in monthly instalment appears to be confusing – kindly clarify. Advance payment security in Bank Guarantee may please be allowed to reduce in every 3 months , thus suggest submission of Bank Guarantee to be of divisible value so that the same could be released when recovery of payment of said value is made





On dispatch of plant from manufacturer's works up 80% of the contract price of ex works Components ………. shall be paid.

The payment terms are not conducive for the cash flow of the manufacturer. We therefore request to please consider to amend these payment terms as under which is also in line with similar many contracts:

"On dispatch of plant from manufacturer's works up 95% of the contract price of ex


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works components shall be paid".


ii) On despatch of Plant from Manufacturer's works: Up to ninety percent 80% of the contract price of Ex-works …………… following in bound folders:

(iii) Up to ninety percent 90% of the Contract Price of transportation, Insurance etc. on receipt of Plant at site shall be paid as progressive payment within thirty (30) days. Insofar as erection and commissioning are concerned 80% of the corresponding contract price shall be paid in monthly installment against pro-rata contract price of the work completed and certified by the EIC.

Please clarify whether the payment is ninety percent as indicated in words or 80% as indicated in numerical.

For erection and commissioning you should release 90% of the contract price on pro-rata basis and balance payment (i.e., 10%) of contract price shall be paid after successful erection, testing and commissioning and within 60 days after the issue of operational acceptance certificate by the EIC.



30. clause(iii),Appendix 1 (Terms and Procedures of Payment)

Up to ninety percent 90% of the Contract Price of transportation, Insurance etc. on receipt of Plant at site shall be paid as progressive payment within thirty (30) days. Insofar as erection and commissioning are concerned 80% of the corresponding contract price shall be paid in monthly installment against prorata contract price of the work completed and certified by the EIC.

Up to hundred percent 100% of the Contract Price of transportation, Insurance etc. on receipt of Plant at site shall be paid as progressive payment within thirty (30) days. Insofar as erection and commissioning are concerned 95% of the corresponding contract price shall be paid in monthly installment against pro-rata contract price of the work completed and certified by the EIC.


31. Appendix 2 Price Adjustment

‘L’ = Labour Index Consumer Price Index Numbers for Industrial Workers – National salary & wage

For the purpose of calculation of Price Adjustment w.r.t Labour part, Consumer Price Index Numbers for Industrial Workers -National salary & wage index for


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index for construction labours( Base: 2004-05 = 100) issued by Nepal Rastra Bank.

construction labours ( Base: 2004-05 =100) issued by Nepal Rastra Bank. Since manufacturing process will be done in India, the Index published by RBI may be considered.


Components Fixed Steel Labour (Skilled)

HSD

F s I d

HM supply 0.20 0.60 0.40 NIL

HM erection and other Services

0.20 0.25 0.75 NIL

You have mentioned in HM Supply, sum of Coefficient values for fixed potation (20%), steel (60%) & labour (40%) is 120%.

As per 2. Service Portion (Erection, Testing, Commissioning and others) formula you have indicated fixed portion, labour and fuel components and fuel component (i.e., HSD) is mentioned as NIL. The sum of all co-efficient value should be in 100% (for fixed and labour component).



Components Fixed Steel Labour (Skilled)

HSD

F s I d

HM supply 0.20 0.60 0.40 NIL

HM erection and other Services

0.20 0.25 0.75 NIL

In Price adjustment formula fixed content of both supply and erection services for the best interest of the project suggested to be revised as 10% instead of 20% stipulated. For erection services components, HSD components may not be ignored, should be at least 20% instead of NIL as stipulated – kindly accept the above to avoid undue loading in quoted price to cover escalation for the best interest of the project.


34. Appendix - 3, Insurance requirement

Covering bodily injury or death suffered by third parties (including the Employer’s personnel) and loss of or damage to property (including the Employer’s property and any parts of the Facilities that have been

3rd party liability insurance INR 15 Million per occurrence appears high, thus request to be reduced suitably including the total limit from the practical point of view.


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accepted by the Employer) occurring in connection with the supply and installation of the Facilities. Such Insurance shall be effected for an amount equivalent to at least INR 15 (Fifteen) Million for any one loss on reinstatement basis but in total not exceeding INR 90 (Ninety) Million.

35. Appendix - 4, Time Schedule & LD Milestone

Sr. No.

Description

Milestone

1 Radial Gates

Erection of Radial Gate after handing over by civil contractor within 5 months in each bay.

2. Intake Gates

Erection of Intake Gate after handing over by civil contractor within 3 months in each bay.

3. Pressure Shaft Steel Liner

Erection of each pressure shaft steel liner lower bend including testing within 3 months after handing over by civil contractor.

4. Pressure Shaft Steel Liner

Erection of complete pressure shaft steel liner after backfill concrete of respective lower bend by civil contractor within 15 months.

Milestone period of each of 6 Radial Gate and 2 Intake Gates may please be related to handing over of their civil fronts by civil work Agency ready for HM erection work. Moreover in case of Radial Gates Civil fronts to be handed over in 2 stages initially Trunion level and subsequently after reaching deck level concrete completion. In Milestone period for Pressure Shaft Steel Liner, complete erection of difficult underground Pressure Shaft Liner of 2 lines of 5.5 M dia 859 M length and 4 lines of 4.4 M dia 251 M length along with 2 Vertical Shaft and 2 Bifurcation within 15 months appears to be practically difficult. We would suggest the same may please to be mutually decided after award of order on receipt of respective erection fronts of complete Pressure Shaft Liner from Civil work Agency.

The milestone of handing over of Civil fronts to HM contractor has been kept in the scope of Civil Contractor. Civil fronts shall be provided at deck level for erection of 2nd stage embedment & gate erection.

36. Appendix - 4, Time Schedule & LD Milestone

..... Construction schedule is attached separately....

The said referred construction schedule is missing and is needed for us to plan our activities accordingly and enclose alongwith our Bid


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37. Appendix-V - List of suppliers for major items of plant, installation services:

5. Hydraulic Cylinder

1. Rexroth

2. Montan

3. NuovaOleodinamica Bonvicini

4. Hunger

5. Eaton Hydraulics

6. Ruhfus Hydraulics

7. GMW

At Sl No.5 i.e. hydraulic cylinder, certain "Make" of Indian origin has been incorporated. Such Indian manufacturers have not designed, manufactured and supplied large hydraulic cylinders of capacity and stroke length required for Radial Gates within India. Hence the list of "Make" for hydraulic cylinders should be re-visited to exclude such brands, which will create inequitable and unjust competition amongst the bidders. Similarly, at Sl No 10 i.e. TRCM, the "Make" Texmaco should be incorporated as we have also successfully designed, manufactured and commissioned TRCMs of requisite capacity and specification as per TS of this Bid document.


38. Appendix-V - List of suppliers for major items of plant, installation services:

10. TRCM 1. KUENZ

2. MUHR

3. GMW

We now request you to kindly consider our name for supply of Trash Rack Cleaning Machines required in the projects being implemented/to be implemented by SJVNL and incorporate our name in the ‘List of Suppliers for Major Items of Plant, Installation Services’ for Trash Rack Cleaning Machines.


Vol-4, Section – 5, Price Schedule

39. Price Schedule 1A (Sr. No. 101 to 107), 1B (Sr. No. 101 to 107)

As per current information in the Price Schedule, Unit prices Mt to be filled in price schedule for pressure shaft steel liner and its accessories based on weights pre fed in price

In case the bidder is able to optimize by design the overall tonnage lower than pre fed in the price schedule, there should be provision to quote for such reduced tonnage


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and 1 (Sr. No. 289 to316),

schedule (with no scope of the bidder being able to change the pre fed tonnage).

at the bidder unit prices.

40. - Soft copy of BOQ and Data Sheets It is requested to please provide soft copies of the BOQ and various Annexures of Vol V section 6 and Data Sheets.

Soft copies of BOQ (pdf and excel version) can be downloaded from the e-portal itself. Soft copies of Data Sheets and Annexure of Vol-5, Section-6 are enclosed.

41. - Downloading of Price Schedule As per the tender document downloaded Price Schedule document as described to be part of volume 4 not available for required download. Kindly upload the Price Schedule for downloading.

Price schedule is available on the e-portal, sjvn.abcprocure.com.

Vol-5, Section – 6, Technical Specifications, Section-A

42. Clause 1.2.1(i), Chapter 1 and clause 3.7.0 S. No. 20, Chapter 3

Crane rails as minimum CR 100 as per clause 1.2.1(i) and Rail of suitable size but not less than 45 kg/m

The discrepancy between both clauses regarding size of crane rail may please be clarified.


43. Clause 1.2.2(h) Chapter 1

It has been mentioned that steel liners to be provided 1 m U/S & 1m D/S from the edge of sill beam of sluice radial gate.

We presume that for sluice radial gates, steel liners shall be in the invert only and for a reach of 1m u/s and 1m d/s from the edge of the sill beam. Please confirm

The content is self explanatory and clearly shown in specification drawing.

44. Clause 2.1.5.2, 2.4.5.2 & 2.9.4.1, Chapter-2

Single open reduction only We propose double open reduction. Please confirm.

Existing provision shall prevail

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45. Clause 2.1.5.3 (i) & 2.5.4.3 (i), Chapter-2

Motors shall be of totally enclosed with or without fan cooling slip ring type design for operation on 3 phase, 400/440 volts, 50 cycles per sec., A.C., conforming to IS:325 (Latest Revision) of rated capacity.

slip ring motor has been recommended for hoist control, the motor type can be changed to A.C induction motor to run the hoist of the gantry.


46. Clause 2.1.5.3 (ii) & 2.4.5.3(ii), Chapter-2

All hoist motor controls shall have at least six speed control points in each direction of operation.

As per our comment on 2.1.5.3 (i), note that A.C induction motors can be run with high performance state of the art sensor less vector control A.C variable speed drives to achieve all functional requirements for a hoist application. We recommend the use of above technology in place of slip ring motor with resistor.

Existing provision in the bid shall prevail

47. Clause 2.2.1 (a), Chapter-2

A position indicator shall be provided in the gate. It has to be of sturdy design and manufactured to be installed outdoors under severe weather and operation conditions. The signal from the position indicator must be continuous, from fully closed to fully open as 0-100%. The signal shall be sent to the control panels.

As per the last para position indicator to be supplied. kindly specify which type of sensor to be used to achieve proper gate position indication, also note that this clause does not have details of feedback to be given to a remote panel at dam control room for display of gate position, the same to be added in the technical specification description of gate position indicator.

The gate position indicator shall be of digital type. The gate position shall also be displayed at dam control room.

48. Clause 2.2.1 (f), Chapter-2

The trunnion pin shall normally be supported at both ends on the trunnion bracket. The trunnion pins shall be designed for bending for the total load transferred through the trunnion hubs. The load shall be taken as uniformly distributed over the length of the pin bearing against the hub. The pin shall be checked for shearing and

Note that against corrosion resistant steel IS 1570 Part v the pin can be manufactured out of IS 3444 corrosion resistant stainless steel (casted). This material for pin has been used in various projects in place of IS 1570 Part v


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bearing also for the same load. The trunnion pins shall be corrosion resistant steel conforming to IS: 1570 Part V (latest revision) and suitably locked against rotation.

49. Clause 2.2.1(g), Chapter 2

The Coefficient of Friction of Trunnion Bush should be lesser than 0.05

None of the reputed manufactures of self lubricating Bushes like DEVA, LUBRITE, GGB offer the bushes with such low friction. The range varies from 0.05 to 0.18. Hence the coefficient of friction mentioned in this clause may be revised as 0.1 to 0.18.


50. Clause 2.2.3, Chapter-2

Design Criteria for Sluice Radial Gate.

As the Cl. No. 2.2.3, you have mentioned Sill Elevation is EL.808.00m, EL. of C/L of trunnion is EL. 823.00m &: Design head is 37.00m + Silt load, upto half gate height. But whereas in Drawing No. AH-HM-SRG-S03 - sluice radial gate general arrangement, you have mentioned sill elevation is EL. 822.685m &: Design Head is 37.014m + Silt load upto half of gate height.

Kindly clarify.


51. Clause 2.2.4.3(ii), Chapter-2

Hydraulic cylinder assemblies shall be designed so that when the gate and hoist assembly are erected exactly to the nominal design geometry, the piston rod shall have an available over-stroke in addition to the stroke required for complete rod extension to lower the gate fully. The overstroke measured along the piston rod travel be not

Note that the Provision for over stroke is generally 100 mm as per normal practice in our experience. Kindly amend the technical specification accordingly.


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less than 40mm.

52. Clause 2.2.4.3 (vi) (c), Chapter-2

Outer surface of piston rod, which contacts the piston rod guide bushing and seals to be ground and polished to uniform concentric finish having surface finish equal to or better than 0.2 microns

The surface finish will be as per manufacturer procedure / recommendation as it is bought out from reputed manufacturer.


53. Clause 2.2.4.3 (xiv), Chapter-2

Each gate cylinder shall be equipped with an electronic position transducer to measure the position of the gate. The transducer shall be suitable for accurately measuring 50-Hz quantities.

Please give specific details of transducer types to be used as per normal practice for Radial gate angular transmitter type sensor, to be mounted on trunnion bracket assembly, connected to digital display to give gate position. Same can be used for measurement of angular mismatch.


54. Clause 2.4.4.3 (xiv), Chapter-2

The gate shall be equipped with an electronic position transducer to measure the position of the gate. The transducer shall be suitable for accurately measuring movement of gate. Transducer outputs shall be a D.C. current signal ranging from 4 to 20mA full scale suitable for termination in a load, resistance up to 500 ohms.


Detailing shall be finalized during detailed design.

55. Clause 2.2.4.3 (xv), Chapter-2

Since each gate shall be operated by a twin cylinder hydraulic hoist, therefore, synchronization of the two hydraulic cylinders shall be planned and designed accordingly. The equipment necessary for the synchronization of the hydraulic cylinder shall be provided by the contractor and is included in the scope of work.

What kind of synchronization is required, do you require closed loop PIV valve controlled synchronization, kindly specify in detail so that the system to be supplied can be accordingly designed. The same to be given at tender stage as the technology to be used to achieve synchronization system will have impact on price.

The synchronization of hydraulic cylinders shall be with servo valves. However, the detail shall be finalized during detailed design.

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56. Clause 2.2.4.5 (iii) (g), Chapter-2

Surge suppressors (hydraulic accumulators used as shock dampers) shall be provided in the cylinder pressure line(s) and elsewhere as required to dampen pulsations, surges, and pressure shocks in the hydraulic system resulting from valve operation and from hydrodynamic forces on the gate.

As per normal practice surge separators (Hydraulic Accumulators) are not being used in hydraulic circuits these days. Kindly reconfirm.


57. Clause 2.2.4.12 (i), Chapter-2

Transducers shall be suitable for accurately measuring 50- Hz quantities. Transducer outputs shall be a D.C. current signal ranging from 4 to 20 mA full scale, suitable for termination in a load, resistance up to 500 ohms. If the standard transducer has an output different from 4 to 20 mA, suitable instrumentation shall be provided to achieve an output of 4 to 20mA.


Detailing shall be finalized during detailed design.

58. Clause 2.2.4.17 (iii) & (viii), Chapter-2

(iii) Capacity of hoist = Minimum 460T (Minimum 230t capacity per cylinder)

(viii) Design Stroke = 12.9 m approx

The cylinder Stroke has been mentioned as 12.9 m approx. We understand that keeping the stroke around 12.9 m is not necessary and we can provide the stroke of the cylinder as required keeping the criteria of minimum hoist capacity as 230T. Please Confirm.

The stroke of 12.9m is approximate value.

59. Clause 2.2.4.17 (ix), Chapter-2

Lowering under self-weight (In case the gate is not able to lower under self weight, the contractor shall provide double acting hoist without any extra cost)

Lowering in self weight is provided so that in case the lowering system is not operated, the gate should automatically close. Kindly reconfirm if the hydraulic cylinder of radial gate to be designed for pushing also.

The gate shall be capable of lowering under its own weight. However, if it is not lowering under its own weight, the double acting hoist shall be provided for which cost shall be included in the quoted price.

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Design Criteria of Bulkhead for Intake Gate

As per Cl. No. 2.5.3, you have mentioned top of track is El. 835.00m. whereas in Drawing No. AH-HM-BHG-S06 Bulk head for main intake gate general arrangement, it shows top of track is El. 831.00m. Kindly clarify.



Design Criteria of Bulkhead for Intake Gate

As per Cl. No. 2.5.3, you have mentioned Design Criteria, Design Head of Bulkhead for Intake gate shown in document as 26.0m + half gate height silt load. But, whereas in the Drawing No. AH-HM-BHG-S06, the Design head is mentioned as 26.00m (in the salient features). Please clarify.



xiv) Design Head: 26.0m + half gate height silt load

As per drawing AH-HM-BHG-S06, design head is 26.0m. Please review and confirm the correct head. Also, confirm if the same head needs to be considered when head acting from HRT (slide gate acting).



xxv) Governing Indian Standard: IS: 4622 (latest revision)

Please also include code standard for slide type gates (i.e., IS 9349).


64. Clause 2.5.4.5, Chapter-2

v) wheel base of crane : 6.50m As per drawing AH.HM-BHG..s06, wheel base of crane is 7.50m. Please review and confirm the same.



Design Criteria for Main Intake Gates

You have indicated Top of track is EI. 835.00m in the design criteria for Main Intake Gates.

But, in the drawing No. AH-HM-IG-S07-


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Main Intake General arrangement, you have mentioned as El. 831.00m. Kindly confirm.


Para 2-" Sixteen sets of trash rack for sixteen intake bays.......

Possibly it is typographical error, as total opening for trash racks are 8 nos. and each bay consists of 8 panels. Please review and confirm.



viii) Static Design Head: 54.0m and silt load up to half gate height.

As per drawing AH-HM-AG-S09, design head is 54.0m. Please review and confirm the correct head.


68. Clause 2.9.4.1 (a), Chapter-2

Cover for CDU to be of 3 mm and Stainless steel

We assume that cover to be of 3.15 mm and of M.S with SS handle as stated at other Gate Hoists


69. Clause 3.1.0 S. No. 4, Chapter 3

Recommended material for Thrust/ bearing Pad Aluminium Bronze to IS: 305

The bearing pads were provided in earlier old designs. Nowadays instead of Bronze pads I stainless steel pads are welded in slide gates to get rid of the problem of shearing of bronze pad screws which is in line with the recommendation of IS 5620/9349.

Please inform whether we can provide stainless steel pads in place of Bronze pads.


70. Clause 3.1.0 (3) & 3,2,0 (6), Chapter-3

It states slide /wheeled Track and seal seats of corrosion restart Stainless steel

We inform you that Track will conform to corrosion resistant steel conforming to AISI 420/430 and stainless steel AISI 304 will be for seal seat.


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71. Clause 3.1.0 (10) (a) & 3.2.0 12 (a), Chapter-3

Spring conforms to Stain less steel We presume that spring will be of spring steel conforming to IS: 4454 / EN 45 and not stainless steel IS: 1570


72. Clause 2.5.1, 2.10.1, & 2.11.1, CHAPTER-2

The wheels to be provided with stainless steel spherical rollers bearings

These are bought out items and are readily available. The material of spherical rollers bearing will be conforming to the Standard manufacturer recommendation/ consideration and will be of reputed make such as : SKF/FAG/NTN/ZKL/TIMKEN Equivalent



Stainless Steel self aligned spherical roller bearing conforming to IS or Standard Make

74. Clause 2.1.4 (a) & 2.3.4 (a), Chapter-2

Hooks of mild steel and galvanized We presume that Hooks of Forged Steel conforming to IS: 1875 or IS: 2004 to be provided and without galvanized. If M.S. is provided then galvanized. Please clarify.


75. Clause 3.6(3), Chapter-3

Hooks of Forged steel conforming to IS: 1875 or Structural steel of IS: 2062


76. Clause 2.2.2.2 (i) (a), Chapter-2

All piping are of Stainless Steel It is requested to furnish / forward equivalent IS Code for Piping material or Is it equivalent. to ASTM A :270 type304.OR ASTM A 312 Type 316 or DIN 2391C. Please Clarify.

Refer clause no. 3.8.0 of chapter 3 (Materials) of Volume 5, section 6 (Technical specifications)

77. Clause 3.8.0 (17), Chapter-3

Piping are to be of seamless stainless Tubes to be conforming to

DIN -17440/8 DIN – 17458

DIN – 2462 BS - 3604

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78. Clause 2.6.4.1 (a), 2.9.4.1 (a) & 2.10..4.2 (a), Chapter-2

Motor of IP66 We presume AC motor of TEFC, starting on DOL, or VVVF drive with insulation Class F Temperature Limit Class B and protection IP55

Please refer sr. nos. 39, 42 & 44 of Corrigendum / Addendum no. 3.

79. Clause 4.10.5 (a to d), Chapter-4

Motor of TEFC with IP 54 Protection Existing provision shall prevail.


Operational Acceptance In case of trial operational acceptance complete, and reservoir filling started, even power generation started after operation, but taking over certificate delayed due to reasons beyond HM Contractor, their due payment and Bank Guarantee liabilities to be released to ease their financial hardship.


81. - - Instrumentation & Remote control with ARMAC which includes supply of level sensors & Dam Control Room remote for controlling gates to be used for operation of gates also is not a part of the package, as a standard practise same to be added so that complete responsibility of running of all gates successfully to be in one contractors scope. As EPC HM contractor is being contracted separately I&RC with ARMAC also to be included in this scope. The same is also is required as various LCP’s of all hoists have to give feedback to I&RC system, complete coordination is required, which cannot be done at a latter date, we recommend the scope of I&RC system to be mentioned in this contract scope.


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Vol-5, Section – 6, Technical Specifications, Section-B


(a) internal water pressure corresponding to the maximum surge in the upstream surge shaft i.e. EL. 880.00m or static head alongwith maximum normal water hammer pressure at turbine inlet whichever is higher.

Please indicate tentative water hammer percentage to be considered.


83. Clause 1.8.5 (ii), Chapter-1

Backing Bars of 12 mm thick steel of ASTMA 537 Cl 2

We request to allow us to use IS: 2062 of same thickness in place of ASTM A537 Cl 2.


84. Clause 1.11.1 (v) (b), Chapter-1

All shop circumferential joints and all accessible field circumferential joints shall be 100% X-ray examined.

All shop circumferential joints may be 100% radiographed while all field circumferential joints may be 100% ultrasonically tested.



i) Rail track: The contractor shall install and maintain a rail track to move and to position the pipe sections and leave the rails embedded in secondary concrete with the approval of Engineer, provided the rails are supported on steel pieces. Finger bars and other temporary supports shall be installed in such a way that no deformations are induce in pipe.

The erection procedure/ pressure shaft drawing does not indicate any erection gallery at the top of vertical shaft. It will be very difficult to erect and monitor the 5.5 m dia ferrule alignment without proper approach.

Hence we request you to provide the parallel adit to butterfly valve chamber and vertical shaft erection gallery.

No parallel adit shall be provided.

Vol-6, Section – 7, Tender Drawings

86. Note 17 of Drg. The gate Trunnion location is fixed on the We presume that the model studies are not Model studies, if required, shall

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No. AH-HM-SRGS03

basis of water surface profiles. These surface profiles may undergo review due to model studies. If it is found that water surface the overall planning of gate may undergo change.

in the scope of this bid. Further any financial repercussions due to change in the planning of the gates due to model studies or otherwise shall be paid extra to the contractor. Please confirm.

be carried out by SAPDC. The relevant clause of bid document (GCC) shall govern.

87. Clause 2.2.3(vii) & viii) Sec A Chapter 2 page 30 of 171 Vol V Sec 6 and Drg. No. AH - HM - SRG - S03

As per clause 2.2.3

E.L. of C. L. of Trunnion = 823.0 m Sill elevation = 808.0 m

As per drawing E.L. of C. L. of Trunnion = 822.685 m

Sill elevation = 807.986 m

These levels mentioned in Drg. No. AH - HM - SRG - S03 and clause 2.2.3 are different.

We presume that levels shown in the drawing are correct.

Please confirm.


88. Drawing No. AH-HM-PS-S11

In drawing both surge shaft gate and butterfly valve chamber u/s of upper vertical bend has been provided.

Purpose of butterfly valve at this location in pressure shaft is not clear.


89. Drawing No. AH-HM-PS-S11 note no. 4

All the pipe shells, bends, wye pieces, taper pieces etc. shall be in general subjected to test pressure equal to 150% of the design pressure reducing stresses not exceeding 90% of yield stress in shell.

IS code 2025 section 8.4.2 considers test pressure as 1.3 times the design pressure. Which test pressure to be followed while designing the penstock shells?


90. Drawing No. AH-HM-PS-S11 note no. 8 (c)

All circular joints shall be 100% ultrasonically tested.

All shop circumferential joints may be 100% radiographed while all field circumferential joints may be 100% ultrasonically tested.


91. Drg. No. AH-HM PS-S12

Transition piece at the start of pressure shaft The starting point of the transition at downstream of the surge shaft is not clear in the drawings. Please clarify the starting point and also


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length of the transition with respect to CL of the surge shaft. Further please clarify whether this transition shall be of steel or concrete.

92. Drg. No. AH-HM- PS-S12

Manhole in Penstocks

The manhole in the Penstocks has not been shown in the drawings.

Please clarify the location of the manhole.

The location of manhole shall be finalized during detailed design.

93. Drg. No. AH-HM-PS-S12

The angle between two nos. pressure shafts staring from surge shaft.

The angle between two nos. pressure shafts staring from surge shaft has not been mentioned in the drawings. Similarly the angle of bifurcation of each penstock has also not been mentioned in the drawings.

Request to please inform these angles for proper layout and design.


Vol-7, Section – 8, Data Sheets

94. Volume 7 , Section 8

Data sheet 4

Erection Methodology

Bidders has been asked to submit Erection Methodology with substantial details to achieve completion of work within schedule time period. The same could be prepared based on the related interface completion schedule of civil front ready for HM erection which has not been furnished - kindly furnish.
