W912P522R0003 ProjNet_ Amendment 5.pdf

7/13/22, 8:27 AM ProjNet: Logged In User https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 1/15

Controlled Unclassified Information (CUI) Only

Bid Inquiry Contractor Report All Inquiries

Project: Turbine Generator Rehabilitation Review: Bidder Inquiry (00001) (sorted by CommentID ) Displaying 57 inquiries.

Id Discipline Sheet Detail Spec 9701766 Contracting SF-1442 Comment Classification: Controlled Unclassified Information (CUI)

Given the scope of the RFP, it is not possible to submit a responsive bud by the 19-May-2022 date as specified in the SF-1442.

The Contractor kindly requests the the bid due date be extended by a minimum of 45 days and further requests an expedited response to this request.

On: Apr 21 2022.

Government Response. . This will be addressed in an amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9701793 Contracting Contract Clauses W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Given the current market/supply-chain and transportation volatility, which was compounded by the Russian invasion of Ukraine, it is virtually impossible to get any type of price validity from material suppliers (foundries, etc.) and logistics companies. The Contractor's Board of Directors is requesting that all new contracts include an Economic Price Adjustment clause in order to approve submitting a bid.

The Contractor kindly request that an EPA clause, similar to the one in the Little Rock District's Norfork RFP, be included in the Section 00 73 00 - Supplementary Conditions.

On: Apr 21 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jun 07

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9706983 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

We kindly request an extension to the bid due date of at least 8 weeks, until July 14th. A proposal of this magnitude typically requires a minimum of 4 months to prepare. With the requested extension, we would be at 3 months. This is just enough time to prepare a proposal, less than that is not feasible.

On: Apr 25 2022.

Government Response. . This will be addressed via Amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9707002 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Due to the expected duration of the project (exceeding 5 years), our surety companies will not accept to issue one bond for all units, valid until the end of the warranty period of the last unit. Would it be acceptable for the District to allow Contractor to bond each unit separately? If not, would the District consider implementing a rolling bond approach as it has been implemented in the past by USACE on other projects?

On: Apr 25 2022.

Government Response. . This will be addressed via Amendment. On: Jul 11 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9707550 Hydropower instruction to Bidders 1.8 Site Visit section 20 21 00 https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont&RequestTimeout=1000&pagStrRowSort=CommentID https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont&RequestTimeout=1000&pagStrRowSort=Discipline https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont&RequestTimeout=1000&pagStrRowSort=Sheet https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont&RequestTimeout=1000&pagStrRowSort=Detail https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont&RequestTimeout=1000&pagStrRowSort=SpecText https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 2/15

Comment Classification: Controlled Unclassified Information (CUI)

Typical Site visit Generator data taking time is (6 to 10 hours) and requires status of the following questions on the status of the unit(s) during the site visit on May 5, 2022.

1. For data taking will the rotor be out of the machine?

2. Will all end bells are removed?

3. Are both ends of the windings and the back of the winding accessible?

4. Plant contact name and cell number?

5. Plant contact phone number at plant?

6. Do you have a spare coil available to measurements?

7. Do you folks have a spare Laminate for measurements?

8. Is it possible for the USACE to post a photo of the nameplate?

Thank you in advance for your prompt response for our pre site visit planning, On: Apr 25 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jun 07

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9710754 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications /48 13 13.00 / Para. 3.1.3 The contractor asks that the Government please confirm that the following interpretation is correct: The contractor understands that the model test results shall be presented without any adjustments for uncertainties. However, the contractor understands that test stand uncertainty shall be taken into account in evaluating the guaranteed performance.

On: Apr 27 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jun 07

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9710756 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 48 13 13.01 / Para. 1.5.2 a The Contractor asks that the Government please confirm that the following interpretation is correct: While the prototype WAE is verified during model testing, only the prototype power output will be verified at prototype scale (see paragraph 1.5.7.2).

On: Apr 27 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jun 07

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9710758 Hydropower W9127N23R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 48 13 13.01 / Para. 1.5.2 The Contractor asks that the Government please confirm that the following interpretation is correct: In Table 2, the Maximum Guaranteed Protype Turbine Power Output (hp) should read 28,500 hp, as is specified in Table 1.

On: Apr 27 2022.

Government Response. . This will be addressed via an Amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9710760 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 48 13 13.01 / Para. 1.5.7.2 The Contractor asks that the Government please confirm that the following interpretation is correct: The Contractor understands https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 3/15 that only the maximum power at a net head of 54 feet will be used to determine compliance with the prototype performance guarantee.

On: Apr 27 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jun 07

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9710762 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 48 13 13.01 / Para. 1.5.3.2 The Contractor asks that the Government please confirm that the following interpretation is correct: The Contractor understands that the depth of cavitation must be less than 1/8 inch in an area of two square inches OR LESS.

On: Apr 27 2022.

Government Response. . This will be addressed via amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9710763 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 48 13 13.01 / Para. 1.5.6 a The Contractor asks that the Government please confirm that the following interpretation is correct: The Contractor understands that the 97% peak-to-peak pressure pulsations will be the criteria for measurement.

On: Apr 27 2022.

Government Response. . Please see spec section 48 13 13.00, paragraph 3.1.11 d. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9710765 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

W912P522R0003 final / X. CAVITATION PITTING GUARANTEE The Contractor asks that the Government please confirm that the following interpretation is correct: If a third cavitation repair is required, then a lump sum payment of $100,000 shall be paid by the contractor and no further cavitation repairs or LDs for cavitation repairs shall be performed by the Contractor.

On: Apr 27 2022.

Government Response. . Please see specification section 48 13 13.01, paragraph 1.5.3.1. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9711169 Hydropower W912P522R0003 Comment Classification: Public (Public) we are unable to download the final spec as of today (04-27). The bid time given for a project of this size is too short. We kindly request for 8 weeks extension for us to put together a quality proposal.

On: Apr 27 2022.

Government Response. . This will be addressed via amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9714672 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

The RFQ, Section 48 13 16.00 26, page 16, item 2.5.2.3 (Ground Insulation), requests to provide ground insulation that consists of multiple overlapped layers of mica tapes applied continuously throughout the entire length of the coil. Apply the same number of overlapped layers to achieve an equal thickness of ground insulation throughout the coil.

GE Request to change the text for the following: provide ground insulation that consists of multiple overlapped layers of mica https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 4/15 tapes applied continuously throughout the entire length of the coil. Apply sufficient number of overlapped layers to achieve an required thickness of ground insulation throughout the coil to support the electrical stress in each area and meet the minimum required gap between parallel arms.

Reason for change: The straight part insulation is applied by an automatic taping machine while the insulation in the knuckles may be applied manually. A scarf join located in the overhang (after the bend) will ensure a good overlap of the insulation from the straight part to the insulation in the knuckles. Compression of the insulation in the overhangs is performed mainly by shrinking tapes and flat metal shims which could lead to a wider variation of the insulation thickness compared to the straight part of the coils. Therefore, ground wall insulation thickness in the overhangs could be thicker than in the slot part if the number of layers is the same. Knowing that electrical stress in the overhangs is lower than in the slot part, it is less critical to have a smaller number of mica layers in overhangs. As a consequence, to avoid reducing the clearance between the overhangs, and in order to meet the Corona tests requirement after winding installation, GE would design the knuckle insulation with less number of mica layers. In all cases, the final validation of the coils will be performed through the electrical tests and the mockup geometry check (i.e., air distance between coils) to ensure the expected lifetime of the winding.

On: Apr 29 2022.

Government Response. . This will be addressed via amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9714674 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

The RFQ section 48 13 16.00 26, page 16, item 2.5.2.4 (Coil Consolidation) requests to bond the slot and end winding portions of the assembled strands into a homogenous structure of controlled size using heat and pressure.

GE request to change the text for the following: Bond the slot portion of the assembled strands into a homogenous structure of controlled size using heat and pressure

Reason for request: The overhangs of green coils are not consolidated

On: Apr 29 2022.

Government Response. . This will be addressed via amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9714675 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

The RFQ, Section 48 13 16.00 26, page 28, item 3.4.(b) (Coil dissections) requests one (1) slice from the coil grading tape section within 1.5" to 2" from the edge of the grading tape nearest the slot.

GE request to change to One (1) slice from the coil grading tape section 1.0" from the edge of the grading tape nearest the slot.

Reason for request: 1.5" to 2" is in the bending area

On: Apr 29 2022.

Government Response. . This will be addressed via amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9714676 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

The RFQ, Section 48 13 16.00 26, page 29, item 3.5.2 (Thermal Cycling test Method) requests to perform the diagnostic tests listed in IEEE 1310, clauses 7.1, 7.2, 7.3, 7.4, and 7.5 prior to and at the completion of the thermal cycling test.

GE request to change to Perform the diagnostic tests listed in IEEE 1310, clauses 7.1, 7.2, 7.3, 7.4, and 7.5 prior to and at the completion of the thermal cycling test, for information.

Reason for request: GE considers that diagnostic Test results during and after Thermal Cycling Test will be for information only.

The acceptance criteria for Thermal cycling is the Voltage Endurance Test.

On: Apr 29 2022.

Government Response. . This will be addressed via amendment. On: Jun 07 2022 Current Request Status: Request Closed https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 5/15

Information for this report is procurement sensitive.

9714677 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

The RFQ, Section 48 13 16.00 26, page 46, item 3.26 (d) (Blackout test) requests to perform blackout tests at 9.2 kV and 15.8 kV as described in IEEE 1799 paragraph 6.3. No corona visible to the naked eye will be allowed.

GE request to change to perform blackout tests at 9.2 kV and the voltage at the maximum line voltage of the winding diagram as described in IEEE1799 paragraph 6.3. No corona visible to the naked eye will be allowed. Use a corona imaging instrument as backup to visual observations.

Reason for request: The voltage level of the blackout test is impacting directly the air distance design between the coil overhangs and corona camera avoids misunderstandings during test.

On: Apr 29 2022.

Government Response. . This will be addressed via amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9717863 Hydropower Section 00 22 16 - 7.1 Comment Classification: Controlled Unclassified Information (CUI)

Section 00 22 16 – 7.1 Volume 1 – Factor 1 – Past Performance:

We kindly request that the allowed magnitude for each project reference to be increased up to 200 MW and 200MVA.

On: May 02 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jun 07

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9721438 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

We kindly request that the Government make the following drawings available:

- stator frame;

- pole keys;

- pole assembly drawing.

On: May 04 2022.

Government Response. . This will be addressed via amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9725138 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 01 22 00.00 / Para. 1.3.8 and 48 13 13.04 / Para. 3.12.4 Item No. 3212 Machining of Stay Ring Mounting Flange for Outer Head Cover, Unit 3 (OPTIONAL)

3.12.4 Machining of Stay Ring Headcover Mounting Flange (Base for Unit 3 and Optional for Units 1 and 2)

Please confirm if this work for Unit 3 shall be considered as base or optional.

On: May 06 2022.

Government Response. . This will be addressed via amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9725142 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI) https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 6/15

Technical Specifications / 01 22 00.00 / Para. 1.3.4 and 48 13 13.04 / Para. 3.16.4

Does one (1) facing plate mean one (1) 30 degrees section or the facing plates for one (1) complete bottom ring?

On: May 06 2022.

Government Response. . This will be addressed via amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9725148 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 48 13 13.04 / Para. 3.20.9

"However, the Contractor shall include 1/4" of machining stock on the gate end faces."

Does the machining stock have do be Nitronic 60 (for a total of 1/2" plate or 11/32" overlay) or will the Nitronic be added later?

On: May 06 2022.

Government Response. . This will be addressed via amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9725149 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 48 13 13.04 / Para. 3.23.1

"The wicket gate stem bushing housings (the bores into which the wicket gate bushings are inserted) in the headcover and bottom ring shall be field line bored using a Contractor furnished boring bar that will remain the property of the Contractor."

Can it be done in shop instead of field?

On: May 06 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jun 07

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9725153 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 48 13 13.04 / Para. 3.28.6 b

"The spare guide bushing shall be stored throughout the rehabilitation of all units and a total of four sets of oil head bushings will be supplied such that the Government will be left with a spare operating rod guide bushing following completion of the Contract."

Should be "a total of four rod guide bushings" instead of "a total of four sets of oil head bushings"?

On: May 06 2022.

Government Response. . This will be addressed via amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9725156 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 48 13 13.07 / Para. 1.1.1 a

"This SECTION governs the base refurbishment of the turbine guide bearings for Units 1 and 3 and the inspection and optional refurbishment of the turbine guide bearings for Units 2 and 4."

What is the bid item no. for Refurbish Turbine Guide Bearing of Unit 4 as optional?

https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 7/15

On: May 06 2022.

Government Response. . This will be addressed via amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9725210 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 48 13 13.09 / Para. 3.2.10

"The first set of thickness measurements shall be taken after all damaged material has been excavated and after the mild steel filler metal has been placed to build up excavated areas but before the stainless steel weld overlay. A second set of thickness measurements shall be taken after all final machining and finishing of the overlay has been completed. The thickness of the 1/4 inch stainless steel overlay shall be calculated by calculating the difference between the third measurement (final stainless surface) and the second measurement (machined carbon steel surface)."

Should be: "the second measurement (final stainless surface) and the first measurement (machined carbon steel surface)"?

On: May 06 2022.

Government Response. . This will be addressed via amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9725224 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 01 22 00.00 / Para. 1.3.2 / and Technical Specifications / 48 13 13.04 / Para. 3.22.10 e

"Item No. 0203 Furnish Set of Wicket Gate Shear Pins, Spare (OPTIONAL)"

"3.22.10 e. Furnish twenty-four (24) spare shear pins and necessary accessories having the same design breaking strength and dimensions as the replacement pins installed."

Section 48 13 13.04, Para. 3.22.10 e shown the supply of spare shear pins as base scope and bid item No. 0203 is optional.

Please clarify.

On: May 06 2022.

Government Response. . This will be addressed via amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9725235 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 01 22 00.00/ Para. 1.3.3

"Item No. 1040 Provide Multi-jackbolt Tensioning Nuts for Blade Piston Rod."

No details in section 48 13 13.04 about this work for Unit 1 to 3. Please clarify.

On: May 06 2022.

Government Response. . This will be addressed via amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9725249 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 01 22 00.00 / Para. 1.3.4 / and Technical Specifications / 48 13 13.04 / Para. 3.32.7

"Item No. 1210 Wicket Gate Servomotor Bore Machining, Unit 1 (OPTIONAL)" https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 8/15

"3.32.7 Bore Gate Servomotor Cylinders"

Section 48 13 13.04, Para. 3.32.7 shown the work as base scope and bid items No. 1210, 2210 and 3210 are optional. Please clarify.

On: May 06 2022.

Government Response. . This will be addressed via Amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9725268 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 01 22 00.00 / Para. 1.3.4 / and Technical Specifications / 48 13 13.04 / Para. 3.32.8

"Item No. 1203 Chrome Plate Gate Servo Piston Rod, Unit 1 (OPTIONAL)"

"3.32.8 Chrome Plate Piston Rods"

Section 48 13 13.04, Para. 3.32.8 shown the work as base scope and bid items No. 1203, 2203 and 3203 are optional. Please clarify.

On: May 06 2022.

Government Response. . This will be addressed via Amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9725273 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 01 22 00.00 / Para. 1.3.4

"Item No. 1214 Replace 150 Stationary Thrust Bearing Springs, Unit 1 (OPTIONAL)"

No details in section 48 13 13.06 about this work for Unit 1 to 4 as optional. Please clarify.

On: May 06 2022.

Government Response. . This will be addressed via Amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9725290 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 01 22 00.00 / Para. 1.3.2

"Item No. 0204 Furnish New Blade Servomotor Piston Rod (OPTIONAL)"

Please confirm that this item is for a spare New Blade Servomotor Piston Rod.

On: May 06 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jun 07

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9732824 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 48 13 13.01 / Para. 3.6.3.1 d

"The outer edge or tip of the blades shall be machined to the contour of the discharge ring with the blades locked in a position corresponding to the minimum blade angle of no less than 16.5 degrees."

https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 9/15

The contractor requests that the minimum blade angle of 16.5 degrees be removed from the technical specification.

On: May 11 2022.

Government Response. . This will be addressed via Amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9732832 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 40 05 13.00 / Para. 3.7.1

"All turbine oil supply and returning piping located between the main oil supply and return drain headers shall be removed and replaced with new equipment per the requirements above. This includes all valves, strainers, and associated appurtenances."

Would it be possible to receive from the Gourvenment the existing drawings of the piping to be replaced and highlighting the specific lines?

On: May 11 2022.

Government Response. . Please see reference drawings Q15-79/553, 554, and 555. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9735344 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

The contractor acknowledges USACE extension until June 9th, 5 weeks short of the initial request. This USACE opportunity require lots of resources and attention to details to ensure an adequate response.

After further analysis of the RFQ requirements, required clarifications, contractor resources, and conditions of the supply chain market, we amend our initial 8 weeks request for an extension of the bid due date.

The contractor now requests a bid due date of August 5th 2022.

We kindly ask for answer within one week so we can decide if we have the capacity to pursue this opportunity.

On: May 12 2022.

Government Response. . This will be addressed via Amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9735689 Hydropower W912P522R0003 Comment Classification: Public (Public)

We noticed that the cover page (and only the cover page) of one of the documents: W91P522R000+RTA+Tspe cs is still marked as CUI. However, the document is also now publicly available on SAM so we understand that no part of this document is actually meant to be controlled as CUI. If this was an error and the document should not have been made public, please let us know at your earliest convenience.

On: May 12 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jul 11

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9735930 Contracting Bid Due Date Comment Classification: Controlled Unclassified Information (CUI)

The 3-week extension of the bid due date is not sufficient to allow for the preparation and submittal a responsive bid.

The contractor kindly requests an additional extension of a minimum of 8 weeks and further requests a response by no later than May 20.

On: May 13 2022.

Government Response. . This will be addressed via Amendment. On: Jun 07 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 10/15

9738726 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

52.211-18 (Variation in Estimated Quantity) specifies that if the quantity of a unit-priced item in the contract is an estimated quantity and the actual quantity of the unit-priced item varies more than 15 percent above or below the estimated quantity, an equitable adjustment in the contract price shall be made upon demand of either party.

We understand that for some of the CLINs, USACE can ask the contractor to provide quantities up to 15% more without an adjustment to the price. Please confirm our understanding. Also if our understanding is correct, please provide a list of the CLINs which can be subject to FAR 52.211-18.

On: May 16 2022.

Government Response. . no additional information will be provided, please bid or propose as shown. On: Jul 11

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9738811 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specification 48 13 13.00:

Please confirm the peak-to-peak magnitude of the draft tube pressure pulsations considers a 97% confidence level.

On: May 16 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jul 11

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9738819 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specification 48 13 13.01:

Table 1 conflicts with 00 22 16 paragraph 7.3.2 and Table 3-1. Table 1 indicates fixed power outputs for the mid output weight points at each net head, while Table 3-1 indicates the peak efficiency output at each head. The efficiency weighting at each point is inconsistent between Table 1 and the formula in paragraph 7.3.2. Please revise 00 22 16 paragraph 7.3.2 and Table 3-1 to be consistent with 48 13 13.01 Table 1.

On: May 16 2022.

Government Response. . This will be addressed via Amendment. On: Jul 11 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9738857 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

We would like to ask for additional clarification as to which CLINs are to be considered for the following items:

48 13 16.00, 2.11 PDA System 48 13 16.00, 2.13.2 Surge Arrester. Capacitors 48 13 16 00, 2.13.1 Neutral Current Transformers 26 05 00.00, 3.1.2.13 Draft Tube Depression System 26 05 00.00, 2.8 Generator Heaters Not Clear Existing USACE plant/Unit control cabinets modifications 01 30 00 1.46.1.11 New Temperature system

Therefore, please advise whether there are specific CLINs for the above work scope or new CLINs will be provided.

On: May 16 2022.

Government Response. . This will be addressed via Amendment. On: Jul 11 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9740613 Hydropower W912P522R0003 https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 11/15

Comment Classification: Controlled Unclassified Information (CUI)

The contractor understands from the requirements that the following staff must be provided fully at site:

- Project Superintendent (100%)

- Site Safety & Health Officer (100%)

- CQC System Manager (100%)

- Turbine & Generator Engineer (100%)

- Mechanical Engineer (100%)

- Electrical Engineer (100%)

- Submittal Clerk (75%)

- CAD Technician (25%-100%)

- Commissioning Representative (100% 60 days prior to start of comm.)

Please confirm our understanding and also confirm that each staff cannot have any other duties or combined roles ?

On: May 17 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jul 11

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9740617 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 48 13 16.00 / Para. 3.23.3

"Clean pole bodies and repair linear indications on end plates grind radius and peform magnetic particle inspection test. Repair any bent damper segments."

In the technical specifications, the following tasks are required for the re-insulation of the field windings:

- Repair linear indications on end plates grind radius and perform magnetic particle inspection test;

- Repair any bent damper segments.

Since the scope of work is not determined (as is the case in the optional work on pole rivets, dovetail laminations and pole straightness), how many rotor poles should we take into account for these activities in the proposal?

On: May 17 2022.

Government Response. . This will be addressed via Amendment. On: Jul 11 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9740620 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 48 13 13.01 / Para. 3.6.17

"New cam plates shall be provided. The new cam plates shall fit the existing mechanical governor, and match the functionality of the existing cam plates in all aspects outside of updated cam relationship between gate, blade, head."

Would it be possible to receive from the Gourvenment the existing drawings of the mechanical governor and highlighting the cam plates?

On: May 17 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jul 11

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9740627 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications 01 11 10.00 / Para. 1.1.1 / and 48 13 13.02 / Para. 3.6

Realignment scope includes two intermediate stationary alignment checks to confirm realignment about a reference centerline.

https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 12/15

The Contractor shall perform two stationary alignment checks, with consideration of timing in regard to possible seasonal movement. The first stationary alignment shall occur following removal of the turbine runner; the second stationary alignment shall be performed at a point in the refurbishment process, to be proposed by the Contractor for Government approval, with consideration of seasonal movement and the timing of the first stationary alignment. The stationary alignment is intended to provide additional insight regarding the proposed centerline and to allow for consideration of the refurbishment steps necessary to align the unit about the proposed centerline. Repeat the stationary alignment check after refurbished components have been returned to site and field machining has been completed. The repeated stationary alignment shall precede line boring, but shall coincide with re-doweling of the outer head cover position, subject to Government approval of the adjustment of the stationary components to the reference centerline. Submit a Stationary Alignment Check Procedure to detail the stationary alignment approach capturing the requirements listed herein at a minimum. The procedure shall include details for both the first and second stationary alignment checks.

Does the government know at what time on the year the maximum and minimum displacement occur?

Can the government provide alignment measurements done on unit 4 with the date of each measurements?

On: May 17 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jul 11

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9740679 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

7.1.1 Submission Requirements:

"the design, manufacture, and installation of new turbine runners with a diameter of at least 175" for hydroelectric generating units;"

Please reduce the minimum diameter to 150". 175" greatly limit the contractor ability to provide past performance.

For the magnitude (25-65MW), please remove the 65MW upper limit.

These changes are necessary, otherwise the contractor will not be able to comply with Factor 1 and consequently disqualify us.

On: May 17 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jul 11

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9742544 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications / 48 13 13.06 / Para. 3.6.1

REFURBISHMENT OF THRUST BEARING RUNNER (OPTIONAL)

On units as old as Old Hickory, it is very most likely, that a chill layer die casting was used for the fabrication of thrust runners.

The chill is used to obtain locally a particular structure of the running surface with finer grain, higher strength and ductility, higher hardness, and less (micro and other) porosities. This layer thickness could be thin, not enough for the resurfacing as required per the specification.

Could the Government tell us if the thrust runners of Units 1 to 3 have been resurfaced since they were put into service?

If it is observed that this layer is too thin, can we assumed that the additional refurbishment work of the thrust runner will be paid for under the most appropriate miscellaneous time and materials CLIN?

On: May 18 2022.

Government Response. . No additional information will be provided, please or propose as shown. On: Jul 11 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9742546 Hydropower W912P522R0003 https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 13/15

Technical Specifications / 48 13 13.02 / Para. 1.1.3

For the pre-disassembly measurements, stationary alignment measurements, and during reassembly, is it acceptable, instead of a plumb line (tight wire), to use a laser alignment device or a digital level and dial indicators to verify the verticality, concentricity and cylindricity of unit?

On: May 18 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jul 11

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9742565 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications 40 05 13.00 / Para. 3.6.1 / Para. 3.9.1 and Para. 3.10.1

"All lubricating and hydraulic oil piping and associated appurtenances located inside the generator air housing and turbine pit shall be removed, stored in a clean dry environment, cleaned, inspected, reinstalled and tested."

"All pneumatic piping, including the tail water depression system, and associated appurtenances located inside the generator air housing and turbine pit shall be removed, stored in a clean dry environment, inspected, cleaned, and reinstalled."

"All cooling water piping and associated appurtenances located inside the generator air housing and turbine pit shall be removed, stored in a clean dry environment, cleaned, inspected, reinstalled and tested."

On unit as Old as Old Hickory, all piping (cooling water, oil, and pneumatic) of 2 inches and less are ususally in bad condition and it is a lot more expensive than replacing with new piping.

Is it acceptable for Government that the Contractor replaces all piping (cooling water, oil, and pneumatic) of 2 inches and less located inside the generator air housing and turbine pit instead of cleaning, inspecting and testing them.

On: May 18 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jul 11

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9742569 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical specification Section 01 45 00.00.3.8.4 mentions calibrating measuring tools 1 month prior to critical measurements.

Can a detailed list of critical measurements be provided?

On: May 18 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jul 11

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9742573 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Technical Specifications Section 01 50 00 3.3.1 mentions providing the Resident Engineers Office 540 days after NTP or 90 days prior to mobilization. Can this date be changed to be more in line to when contractor mobilizes to avoid additional mob and demob costs associated with setting up an office trailer?

On: May 18 2022.

Government Response. . This will be addressed via Amendment. On: Jul 11 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9742577 Hydropower W912P522R0003 https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 14/15

Technical Specification Section 01 45 00.00.3.5.3 mentions the required staffing on site.

Are the full staffing required at all times?

Can the staffing be reduced during wet commissioning activities?

On: May 18 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jul 11

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9744361 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

Due to the expected duration of the project (exceeding 5 years), our surety companies will not accept to issue one bond for all units, valid until the end of the warranty period of the last unit. Would it be acceptable for the Government to allow Contractor to bond each unit separately? If not, would the Government consider implementing a rolling bond approach as it has been implemented in the past by USACE on other projects?

On: May 19 2022.

Government Response. . This will be addressed via Amendment. On: Jul 11 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9745302 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

TSpec 48 13 13.01 paragraph 1.4.1 for normal operation condition working stresses and paragraph 1.4.2 for higher allowable stresses both include maximum runaway speed as an operation condition for stress calculations. Typically, maximum runaway speed is not considered a normal operation condition. Please remove maximum runaway speed from paragraph 1.4.1 as a normal operation condition for stress calculations.

On: May 19 2022.

Government Response. . This will be addressed via Amendment. On: Jul 11 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9745305 Hydropower W912P522R0003 Comment Classification: Controlled Unclassified Information (CUI)

TSpecs Section 48 13 13.00 paragraph 3.2.3 item p and Section 48 13 13.04 paragraph 3.20.1 item g require the wicket gates have a closing tendency at all openings greater than speed-no-load opening.

Preliminary CFD analysis indicates the existing wicket gates do not have this feature and a new profile shape to achieve this will require a significantly larger servomotor force in the middle openings. Please remove this requirement for high wicket gate openings to remain within the requested scope.

On: May 19 2022.

Government Response. . No additional information will be provided, please bid or propose as shown. On: Jul 11

Current Request Status: Request Closed

Information for this report is procurement sensitive.

9745844 Hydropower W912P522R0003+RTA+TS pecs Comment Classification: Controlled Unclassified Information (CUI)

Please find attached clarifications and questions to COE.

(Attachment: Clarifications_Questions_to_COE.pdf) On: May 19 2022.

Government Response. . 1. No additional information will be provided, please bid or propose as shown.

2. Refer to paragraph 48 13 13.00 paragraph 3.1.3..

3. No additional information will be provided, please bid or propose as shown.

4. Refer to the very low weighting factors at 29.5 feet in Table 1 of 48 13 13.01.

https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicFileDownload&strApp=&strPrevCob=BicPublicReportAll&strShown=Clarifications_Questions_to_COE.pdf&intView=1 https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 15/15

5. This will be addressed via Amendment.

6. Refer to paragraph 1.5.7.1 in Section 48 13 13.01.

7. No additional information will be provided, please bid or propose as shown.

8. Refer to paragraph 3.5 in Section 48 13 13.01.

9. No additional information will be provided, please bid or propose as shown.

10. This will be addressed via Amendment. On: Jul 11 2022 Current Request Status: Request Closed

Information for this report is procurement sensitive.

Report Complete

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