Closed_RFIs_W9127S19R0013.pdf

UNCLASSIFIED\\FOR OFFICIAL USE ONLY

Bid Inquiry Contractor Report All Inquiries

Project: Dardanelle Excitation System, Dardanelle Powerhouse Review: RFI Review (00001) (sorted by CommentID ) Displaying 55 inquiries.

Id Discipline Sheet Detail Spec

8189430 Contracting FAR 52.246-21 (b)

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Under FAR warranty is specified as 1 year whereas 48 19 26, item 1.1.5 lists 5 years. Please advise.

On: Sep 16 2019.

Government Response. . The five (5) year warranty specified in 48 19 26; 1.1.5 Warranty; applies to the installed excitation system components. On: Oct 18 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8189438 Hydropower Section 48 70 01

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

The subject solicitation is for the exciter replacement and does not include any work on the governor. Please delete requirement for MOD-027 and IEEE 125 standard. Otherwise please provide rationale and reasoning why the exciter supplier would be responsible for the governor NERC compliance testing and reporting?

On: Sep 16 2019.

Government Response. . Deleted requirement for MOD-027. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8189444 Contracting PPQ

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Can relevant existing Past Performance Questionnaire from other projects be submitted for this proposal?

On: Sep 16 2019.

Government Response. . Yes, please refer to submission requirements for Factor 2 - Past Performance. On: Oct 07

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8189464 Electrical Section 48 70 01, item 2.8.1

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

The specification is very specific regarding the multifunction relay. Can the District please advise if they have a particular relay and manufacturer in mind?

On: Sep 16 2019.

Government Response. . No particular relay and manufacturer required. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8189471 Electrical Section 48 70 01, item 2.8.2

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

We assume that the plant personnel will remove the existing SEL-2664 relays and handover to contractor for installation in the new cabinet. Please confirm.

On: Sep 16 2019.

Government Response. . Yes. Contractor is required to coordinate with Plant personnel. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8189475 Electrical Section 48 70 01, item 2.4.1

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Page 1 of 11ProjNet: Logged In User

18-Oct-19https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAl...

Please confirm that the LV CT listed in this section are in addition to the three sets listed under item 2.4.4 Also please advise the accuracy class.

On: Sep 16 2019.

Government Response. . Yes. That is correct. Information is not available. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8189479 Contracting 10 Evaluation criteria

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Can an equipment manufacturer be part of more than one JV on this solicitation, or alternatively, can an equipment manufacturer be part of one JV and be part of another proposal as a sub contractor ?

On: Sep 16 2019.

Government Response. . The Government does not preclude offerors from participating in multiple business arrangements On: Oct 07 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8189485 Electrical Section 48 70 01, item 2.4.2

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Typically the HV fused switch has the fuses on the high side of the disconnect switch. Please confirm if this is the intention of this spec section.

Also we assume that the switch is close coupled to the PPT? Please confirm. If that is the case we are concerned about the maximum footprint that has been allowed for the PPT on drawings E-101 to E-104.

On: Sep 16 2019.

Government Response. . Specifications require currently limiting fuses and disconnect switches to be furnished and installed. Additional footprint will be allowed for exciter cubicles and PPT. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8189500 Equipment Section 48 70 01, item 1.1.4

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

I have failed to find the referenced curves anywhere in the specification. Please advise.

On: Sep 16 2019.

Government Response. . Attachment provided. On: Oct 18 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8189549 Contracting Section B - Bidding Schedule

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

It seems to me that the qty/unit for items 0011 and 0012 are not correct, i.e., if the quantity 1 is correct then the unit should read job, but if the unit is correct then the quantity should read 4. Please clarify.

On: Sep 16 2019.

Government Response. . Quantity is 4. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8190992 Contracting 5 A.07.23_Solicitation_W9127S19R0013

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Neither the cover sheet nor the table of contents count toward the page limitations --> I have failed to see where the solicitation lists the page limitations. Please advise.

On: Sep 17 2019.

Government Response. . Language removed; no page limitation is imposed. On: Oct 07 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8190997 Contracting 7 A.07.23_Solicitation_W9127S19R0013

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Page 2 of 11ProjNet: Logged In User

We have not found the 'Offeror Experience Form' mentioned under Sub-factor 1B item e. Please provide.

On: Sep 17 2019.

Government Response. . Language removed; there is no Offeror Experience Form. On: Oct 07 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8193671 Specifications Section 48 70 01, item 3.2.2.1

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Most manufacturer have to make special provisions to provide an ambient temperature of 55 deg C for the factory testing. As we view this more of a type test rather than a routine test we propose that the factory tests for the exciter and PPT are performed for the first unit only at 55 deg C ambient and at normal facility temperature for the remaining 3 units. Please advise if this would be acceptable.

On: Sep 19 2019.

Government Response. . See amendment On: Oct 18 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8198540 Contracting Section 01 14 00, item 1.3.3

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

It may be difficult to meet Unit # 1 outage of March 15, 2020. This will depend on the expected NTP date. Would it be acceptable to move this outage to the same period in 2021 should the NTP date not allow for the design, testing and delivery of the equipment? Please advise.

On: Sep 23 2019.

Government Response. . The first outage may be moved from March 15, 2020 to September 15, 2020. On: Oct 18

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8198585 Electrical Section 48 19 26, item 2.11.1

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Can you please provide details of the existing shaft grounding equipment?

On: Sep 23 2019.

Government Response. . There is no shaft grounding at Dardanelle. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8198852 Specifications 7 (page 45 in .pdf) Section 01 35 26 - par 1.6.1.1

Comment Classification: UNCLASSIFIED (U)

Please clarify if there need to be three (3) separate people (SSHO, Superintendent and CQC person )in addition to construction crew at site for the duration of the outage time.

On: Sep 23 2019.

Government Response. . Yes the SSHO and the CQC are dedicated positions. That can be their only job(s).

Therefore, neither of them can be the Superintendent. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8198885 Specifications Page 1 (page 139 in .pdf) Section 02 82 12.00 10 - par 1.4.1

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Is there a previous ACB report available that identifies the exact location and material affected by asbestos abatement ?

On: Sep 23 2019.

Government Response. . There was a limited asbestos survey done for the exciter wiring to Unit 3. While no asbestos was found as a result of the survey, there is wiring which was not accessible for sampling and is assumed to contain asbestos. Likewise, other units may have asbestos containing material (ACM) and should be treated as such. However, there is no specific report which identifies the exact location of these materials. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8198929 Specifications Page 1 (page 233 in .pdf) Section 48 19 26.00 26 - par 1.1.4

Page 3 of 11ProjNet: Logged In User

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Please provide as-tested Generator Open Circuit Saturation Curve and Generator Capability Curve as stated in the paragraph. We did not see this included in the specifications.

On: Sep 23 2019.

Government Response. . Attachment provided. On: Oct 18 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8198972 Specifications Page 9 (page 241 in .pdf) Section 48 19 26.00 26 - par 2.5.1

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

The rated field current at 42,368kVA and 0.95PF is listed as 1,095Adc in paragraph 1.4.1. We assume that this is at 100% terminal voltage. The requirement in paragraph 2.5.1 states that the new static excitation system shall be rated for field current at 105% terminal voltage. While subsequent characteristic curves may provide guidance on the required field current at 105% terminal voltage, it would create less variation between bidders if the required maximum continuous field current capability of the new system could be stated. For instance, if the field current is 1,200Adc at 105% terminal voltage and the government wanted to have a 5% safety margin, the required maximum field current would be 1,260Adc at 55 degrees C ambient temperature.

On: Sep 23 2019.

Government Response. . See revised paragraph. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8198978 Specifications Page 9 (page 241 in .pdf) Section 48 19 26.00 26 - par 2.5.1

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

The specification states two different short-term field current forcing requirements. Please confirm if the ceiling current requirement shall be 150% of rated excitation current for 30s. It would also make sense for the government to state the required ceiling field current in Adc to avoid that contractors use a different base to apply the 150% to.

On: Sep 23 2019.

Government Response. . See revised paragraph. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8199020 Specifications Page 9 (page 241 in .pdf) Section 48 19 26.00 26 - par 2.5.1.1

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

The no-load ceiling voltage performance is listed as +/- 375Vdc at 95% source voltage, hence +/- 395Vdc at 100% terminal voltage. Due to the electrical characteristic of a SCR rectifier, the negative ceiling voltage will always be lower than the positive ceiling voltage with a factor of 15%. Please clarify if the negative ceiling voltage can be 15% lower than the stated requirement, or alternatively, if the negative ceiling voltage shall remain as stated, which would require the positive ceiling voltage to be 15% higher.

On: Sep 23 2019.

Government Response. . See revised paragraph. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8202878 Contracting Section 01 14 00, item 1.3.3

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

As discussed during the site visit we ask that the outages for 1st and 2nd unit are moved to the same time period in 2021. This will allow for adequate time for the design and delivery of the unit for the outage in September 14, 2020. Please confirm your agreement.

On: Sep 26 2019.

Government Response. . The first outage may be moved from March 15, 2020 to September 15, 2020. On: Oct 18

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8202894 Contracting SF 1442, box 13 A

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

We respectfully request a bid due date extension of 4 weeks starting from the date all questions posted under ProjNet are answered to allow time to prepare the offer. Please advise.

Page 4 of 11ProjNet: Logged In User

On: Sep 26 2019.

Government Response. . Proposal due date is extended to October 29, 2019 at 10:00 A.M. CDST. On: Oct 07 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8202914 Contracting Section 01 35 26, item 1.6.1.5

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

It was mentioned during the site visit that the Corps personnel will operate the powerhouse crane to unload and lower contractor equipment to floor where it is installed. Please confirm.

On: Sep 26 2019.

Government Response. . Project Staff will operate the Crane to assist in unloading and lowering equipment to the floor. However, the crane has a limited area in which to operate. Therefore it will be the contractor's responsibility for any additional adjustments to ensure the correct installation. On: Oct 18 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8202928 Equipment Drawings E-101 to 104

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

During the site visit we discussed the max footprint dimensions listed on the drawings. It was revealed that there is in fact space available in the back of the equipment and on the side opposite to the switchgear. We ask if it would be acceptable to increase the overall allowed footprint by 1ft in each direction. Please advise.

On: Sep 26 2019.

Government Response. . Additional footprint will be allowed for the exciter cubicles and PPT. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8202952 Equipment Section 48 19 26, item 1.1.4

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Please confirm if one CT is not sufficient for the proper operation of the AVR or the PSS it is the responsibility of the bidder to include the cost for the supply, installation and wiring of the extra CT(s).

On: Sep 26 2019.

Government Response. . Correct reference paragraph is 1.4.4

The Government assumes one CT is sufficient for the PSS. Contractor is responsible for meeting the contract requirement. No change to the specifications. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8202961 Contracting Section 01 22 00, item 1.2.6

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Please note that CLIN 0014A to F are not listed under 'Section B - Bidding Schedule'. As discussed during the site walk please provide details of Corps ACM sampling records that was done.

On: Sep 26 2019.

Government Response. . USACE sampling records may be made available; however, the contractor shall be responsible for their own sampling data prior to ACM abatement. On: Oct 18 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8204862 Specifications Form 1442 Solicitation page section 13

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

We would request a 2 week extension to the October 8th bid due date.

On: Sep 27 2019.

Government Response. . Proposal due date is extended to October 29, 2019 at 10:00 A.M. CDST. On: Oct 07 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8204877 Construction Management

Section 00 21 00 - Instructions Joint

Venture Section 00 21 00 - Instructions: Factor

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Page 5 of 11ProjNet: Logged In User

The rules indicate that one vendor with substantial experience but is not a small business can form a joint venture with a small business to submit a bid that utilizes that vendors experience. Can that same vendor form a joint venture with another small business and submit a separate bid?

On: Sep 27 2019.

Government Response. . The Government does not preclude offerors from participating in multiple business arrangements. On: Oct 07 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8204888 Project

Management PN464721 SECTION 01 11 00.00 26 Part1.3.3

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

The outage dates are currently specified as:

March 15, 2020 to June 15, 2020 September 15, 2020 to December 15, 2020.

Can the outage dates be changed to:

September 15, 2020 to December 15, 2020 March 15, 2021 to June 15, 2021.

This request was also discussed during the site walk.

On: Sep 27 2019.

Government Response. . The first outage date may be moved from March 15, 2020 to September 15, 2020. On: Oct 18 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8207158 Equipment A.01.13_W9127S19R0013_Contract_Drawings_pgs_50-

Sheet E-101, E-102, E-103 and E-104

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

The drawings indicated as E-101, E-102, E-103 and E-104 show the dimensions of the exciter cubicle and the excitation transformer (PPT) cubicle with note 3 that states "maximum Footprint". Having been to site and seen the units, there is an abundance of space behind, in front and to one of the sides. As a result, can the dimensions of the exciter cubicle and/or the excitation transformer (PPT) be larger as long as they are reasonable, maintain minimum distances from adjacent cabinets and do not infringe on the main hallway?

On: Sep 30 2019.

Government Response. . Additional footprint will be allowed for the exciter cubicles and PPT. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8207164 Environmental SECTION 01 35 26 Page 18 Section 3.1.2

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

During the site walk, it was mentioned that a study with a report had been conducted and no asbestos was found in the existing exciter equipment cabinets, excitation transformer cabinets, nor any of the control or power cables. Moreover, no asbestos at the control room cabinets where the modifications are to occur. Can asbestos abatement be removed from this project as a required task and hence remove the CLINN from the solicitation?

On: Sep 30 2019.

Government Response. . While no asbestos was found in the limited survey referenced, some wiring was not sampled because it was energized at the time of the survey. It was; however, previously documented as containing asbestos.

Furthermore, due to the age of much of the wiring to the units, it should be presumed to contain asbestos and any risks mitigated; unless it can be confirmed otherwise.

There will also be an amendment to Section 01 57 19 TEMPORARY ENVIRONMENTAL CONTROLS which addresses potential exposure to lead as well as measures to mitigate any lead exposure to personnel. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8208464 Specifications Page 13 (page 245 in .pdf) Section 48 19 26.00 26 - par 2.5.1.10

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

The specification indicates that the exterior finish of the new cabinets shall be Safety Blue, color code SW4086. The existing cabinets and surrounding cabinets all have a light grey finish (ANSI 61 grey etc.). Please confirm if the requested colour is correct.

On: Oct 01 2019.

Government Response. . New exciter and PPT cubicles shall be Safety Blue. On: Oct 17 2019

Page 6 of 11ProjNet: Logged In User

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8208485 Specifications Page 14 (page 246 in .pdf) Section 48 19 26.00 26 - par 2.5.12.1

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

The specification calls for redundant thyristor bridges as well as redundant voltage regulators. One possible configuration is to have CH1 voltage regulator operate with thyristor bridge 1 only and as a back-up have CH2 voltage regulator operate with thyristor bridge 2. An alternate configuration is to have CH1 voltage regulator able to operate either thyristor bridge 1 or 2 and also to have CH2 voltage regulator able to operate either thyristor bridge 1 or 2. Please specify which configuration that is required/preferable.

On: Oct 01 2019.

Government Response. . The Government does not have a preference. Either configuration is acceptable. On: Oct 17

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8208499 Specifications Page 22 (page 254 in .pdf) Section 48 19 26.00 26 - par 2.7.1

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

The specification requires the new excitation system to be compatible with Modbus and that a Modbus register list is included, but also that digital communication to the exciter will not be implemented at this time. Should communication cables between each exciter and the control room be installed for future use ?

On: Oct 01 2019.

Government Response. . Communication cables are not required. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8208609 Contracting 1442 13.A ADDITlONAL SOLIOTATION

REQUIB.ENTS:

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

We respectfully request a bid due date extension of 4 weeks starting from the date all questions posted under ProjNet are answered to allow time to prepare the offer. Please advise.

On: Oct 01 2019.

Government Response. . Proposal due date is extended to October 29, 2019 at 10:00 A.M. CDST. On: Oct 07 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8208691 Contracting Sub-factor 1B: Installation Experience/ 2. Sub-

Contractor Identification Page 7 &

8/72

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Solicitation: "1. Offerors shall submit installation experience by providing a minimum of three (3) project examples that collectively address the elements identified below performed within the past five (5) years. ... 2. Sub-Contractor Identification: If the prime contractor proposes to use a subcontractor for the installation the offeror must submit a signed Letter of Commitment from the subcontractor with the proposal for that subcontractor's experience to be evaluated."

QUESTION: If the signed letter of commitment is provided, will the subcontractors experience count towards the minimum 3 projects needed for requirement 1B Installation Experience, or are they evaluated separately?

On: Oct 01 2019.

Government Response. . Only experience of the offeror and/or an affiliated entity as evidenced by a teaming/joint venture agreement will be evaluated. Experience of a subcontractor will not be evaluated. On: Oct 07 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8208697 Contracting FACTOR 2 – PAST PERFORMANCE (VOL 1, TAB C) page

10/72 NOTE: Teaming arrangements and

Joint Ventures.

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Solicitation "...Only past performance of the corporate entity or JV named on the Standard Form 1442 will be evaluated."

Question: Given this is a small business set-aside and very challenging for small businesses to complete 20 MVA hydro projects on their own, would the USBR please reconsider accepting Subcontractor past performance questionnaires (as long as a Letter of Commitment from the subcontractor is included), to be used as part of the minimum 3 customer PPQs needed for this evaluation factor?

On: Oct 01 2019.

Page 7 of 11ProjNet: Logged In User

Government Response. . Language has been corrected to: "Offerors may submit experience of an affiliated entity where that affiliated entity has made a firm commitment to participate meaningfully in the performance of the contract.

Provide a copy of the teaming/joint venture agreement. If required, JV approval must be obtained in accordance with Small Business Administration policy. On: Oct 07 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8208934 Electrical Solicitation pg. 7 none none

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Pg 7 of 72 in the solicitation under Subfactor 1B, section 1e refers to an attached "Offeror Experience Form." The form is not attached. Will it be provided?

On: Oct 01 2019.

Government Response. . Language removed; there is no Offeror Experience Form. On: Oct 07 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8209701 Contracting FACTOR 2 - PAST PERFORMANCE (VOL 1, TAB C) page

10/72

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

The specification calls for at least three (3) PPQs to be submitted by the small business. Would a higher rating be given if the small business can show more than three (3) PPQs for the relevant scope within the past five (5) years ?

On: Oct 02 2019.

Government Response. . Past performance will not be rated higher based solely on the number or PPQs provided;

past performance will be rated based on relevance and confidence; please refer to Factor 2 - Past Performance evaluation criteria. On: Oct 07 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8209710 Specifications Page 14 (page 246 in .pdf) Section 48 19 26.00 26 - par 2.5.12.1

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Would it be preferable to have draw-out thyristor bridges that would allow the plant to easier inspect and perform maintenance.

The thyristor bridges would be fixed mounted during operation, but with provision to safely withdraw the bridge when the unit is de-energized.

On: Oct 02 2019.

Government Response. . This is not required. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8209746 Specifications Page 28 (page 260 in .pdf) Section 48 19 26.00 26 - par 2.14 (u)

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Please confirm it one (1) local HMI (12" or more) and one (1) remote HMI (19") should be provided or alternatively if only one (1) local HMI panel should be provided.

On: Oct 02 2019.

Government Response. . One (1) spare local HMI and one (1) spare remote HMI should be provided. On: Oct 17

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8209749 Specifications page 28 (page 260 in .pdf) Section 48 19 26.00 26 - par 2.14 (y)

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Please confirm if it is required to provide a spare SEL-2664 field ground relay for the government furnished relays that are being re-used from the old exciters.

On: Oct 02 2019.

Government Response. . One (1) spare SEL-2664 should be provided. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8209818 Specifications Contract Drawings Page

E-101 to E-104

Contract Drawings

Page 8 of 11ProjNet: Logged In User

Considering that there is plenty of space around the existing exciter location, we request if it would be possible to exceed the depth or length requirement. Either by allowing for a 5'-8" depth of the exciter/PPT or by allowing for a 10'8" length.

The larger cabinets will allow for improved access during maintenance and will also improve the air circulation and heat dissipation, which is important considering the 55 degrees C ambient temperature requirement.

On: Oct 02 2019.

Government Response. . Additional footprint for the exciter cubicles and PPT will be allowed. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8209825 Specifications Page 30 (page 262 in .pdf) Section 48 19 26.00 26 - par 3.2.2.1

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

In lieu of actual factory testing at 55 degrees C ambient temperature, which would require renting a specialized heating chamber at at test lab, would the government consider performing the test at a lower ambient temperature and calculate the additional heat rise related to the 55 degree ambient temperature too ensure that the heat rise for the power section is within the allowable limits for all power components. For the control section, we suggest that the vendor provides previous type test reports and/or data sheets, demonstrating that the equipment can function at a minimum of 55 degrees C ambient temperature. Please confirm if this is acceptable.

On: Oct 02 2019.

Government Response. . See amendment On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8209847 Specifications page 3 (page 275 in .pdf) section 48 70 01.00 26 paragraph

1.5.3

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Please confirm if the requested MOD-27-1 turbine modelling and testing is correct as this is typically not part of an excitation replacement specification.

On: Oct 02 2019.

Government Response. . MOD-027-1 will not be required. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8209862 Contracting Page 6/72 Evaluation factor VOLUME 1 FACTOR

1 - Technical

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

USACE contracts have many special procedures and documentation requirements that are different compared to other utility customers, such as, compliance to EM 385-1-1, RMS/QMS, security requirements, on-site documentation and procedures for various features of work, progress billing etc. As such, companies that have executed relevant work with USACE within the last 5 years would have an inherent understanding of all these requirements and risk for unsuccessful performance would be significantly lower compared to companies that do not have experience with USACE projects. Hence, for this reason, will experience on USACE excitation projects be scored higher vs experience with non-USACE utilities ?

On: Oct 02 2019.

Government Response. . The solicitation does not require demonstration of an offeror's experience on USACE vs.

non-USACE excitation projects. On: Oct 07 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8209867 Electrical 26 05 19.00 26

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Specification 26 05 19.00 26 "Insulated Wire and Cable", Paragraph 2.2.5.1 requires a thermoset CPE jacket. This jacket type is not a stock item for any cable manufacturer and must be special ordered with a minimum quantity. With the current specified jacket, the contractor would be required to purchase thousands of feet of unneeded cable at an additional unnecessary cost to the contract. We propose substituting thermoplastic CPE, which is a common stock item for cable manufacturers that can be ordered in exact quantities required by the project.

On: Oct 02 2019.

Government Response. . CPE thermalplastic jackets are acceptable. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

Page 9 of 11ProjNet: Logged In User

8209870 Electrical 26 05 13.00 26

Specification 26 05 13.00 26 "Medium Voltage Cable", Paragraph 2.2.5.1 requires a thermoset CPE jacket. This jacket type is not a stock item for any cable manufacturer and must be special ordered with a minimum quantity. With the current specified jacket, the contractor would be required to purchase thousands of feet of unneeded cable at an additional unnecessary cost to the contract. We propose substituting thermoplastic CPE, which is a common stock item for cable manufacturers that can be ordered in exact quantities required by the project.

On: Oct 02 2019.

Government Response. . CPE thermoplastic jackets are acceptable. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8209891 Equipment SECTION 48 19 26.00 26 Part 1.1.1

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

The Dardanelle project stipulates that equipment must be able to properly function in an ambient temperature of 55 degrees C. In order to more easily achieve this objective, would USACE Dardanelle prefer a system whereby both bridges operate at the same time (n+1)? Thus, for two (2) bridges in this (n+1) configuration, each bridge would provide half of the total maximum continuous current, since they are now sharing the total current, which would reduce the temperature levels in the bridges considerably allowing them to run cooler. The bridges are still providing full redundancy and, should one of the bridges fail, there would still be an automatic and "bumpless" transfer to the healthy bridge allowing the system to continue to run at maximum continuous current including ceiling conditions, if required.

On: Oct 02 2019.

Government Response. . This is acceptable but not required. On: Oct 17 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8210066 Electrical Inquiry 8209891

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

This is for the District consideration that the inquiry under 8209891 describes a flawed redundancy solution that would not be in the best interest of the District.

When both rectifiers are running at the same time under normal operating conditions and you have the case of a fuse rupture is a very high possibility that you will lose redundancy in the bridges and trip the unit because you are likely to rupture the same fuse in the second bridge.

On: Oct 02 2019.

Government Response. . The Government acknowledges receipt of this inquiry; however, there is no question requiring a Government response. On: Oct 18 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8210573 Contracting Solicitation

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

I plan to provide a prime offer to this solicitation. In order to do so, I need a quote from a manufacturer of excitation equipment. In order for the manufacturer to give me a price, they need to know the USACE responses to the RFI's. I respectfully request that the Response Date of Oct 8, 2019 be extended 10 days beyond the date at which time USACE response to RFI's are available to all potential offerors. Please advise. Thank you!

On: Oct 02 2019.

Government Response. . Proposal due date will be extended to October 29, 2019 at 10:00 A.M. CDST. On: Oct 07

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8219098 Electrical Follow up to Projnet 8208691 & 8208697

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Follow up question to government responses to Inquiry ID 8208691 and 8208697: Experience and Past Performance are two separate parts of the proposal, each evaluated independently of one another according to criteria defined in each section. Our understanding of the solicitation is that the government will accept and evaluate "Experience" from the offeror's manufacturing and installation subcontractors as long as a letter of commitment is provided by the subcontractor to the offeror. A letter of commitment is merely a signed letter between the two parties guaranteeing participation by the subcontractor if the offeror is awarded the project. This agreement does not require or constitute any sort of JV and/or teaming agreement. Without this allowance, no small business under this NAICS code would be able to manufacture and install this specialized equipment. Separately, concerning "Past Performance" our understanding is that only the offeror's past performance will be evaluated, with an understanding that no

Page 10 of 11ProjNet: Logged In User past performance on similar projects of scope and magnitude would at worst be evaluated as Unknown Confidence (Neutral), neither strengthening or weakening the offeror's overall proposal evaluation. Please confirm.

On: Oct 10 2019.

Government Response. . Experience and Past Performance are two separate factors and are evaluated separately. It is possible that a letter of commitment would represent a relationship that is not a JV agreement obtained in accordance with SBA policy. A rating of unknown confidence is neither a strength nor a weakness. On: Oct 18 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8221320 Electrical Paragraph

3.3.6 48 19 26.00 26

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

How many brushes and holder need to be replaced on each unit?

On: Oct 14 2019.

Government Response. . There are 14 brushes and brush holders per ring for a total of 28 brushes and brush holders on each unit. On: Oct 18 2019

Current Request Status: Request Closed

Information for this report is procurement sensitive.

8221360 Electrical Paragraph 2.4.4.3.

Section 48 19 26.00 26

Comment Classification: Unclassified\\For Official Use Only (U\\FOUO)

Section 48 19 26.00 26 Paragraph 2.4.4.3. requires three 50:5, class C400 special test CTs. Would C20 relay class be an acceptable alternative. If C400 is required, please provide a make and model that is available.

On: Oct 14 2019.

Government Response. . Class C400 CT is required. Information on make and model is not available. On: Oct 18

Current Request Status: Request Closed

Information for this report is procurement sensitive.

Report Complete

UNCLASSIFIED\\FOR OFFICIAL USE ONLY

Patent 11/892,984 ProjNet property of ERDC since 2004.

Page 11 of 11ProjNet: Logged In User