Section_J_Attachment_6_-_Questions_and_Answers.pdf

Solicitation No. R17PS00016 Amendment 0002

TRD Powerplant Replacement of Station Service

Transformers & LV Bus Systems -RAX 566 Specifications No. 20-C0847

Section J – Attachment 6

Questions and Answers

Question 1: Is there new fence work on this project? I see it in the drawings but not in the specifications

Answer: There is not a new fence requirement for this project.

Question 2: Can you provide the seismic requirements for each of the three locations?

Answer: Throughout the solicitation it requires the contractor to submit seismic calculations in accordance with the 2012 International Building Code (IBC) for each location.

Question 3: Can USBR provide drawings or details on primary and secondary connections required?

Answer: The specification drawings provide as much details that is known concerning the primary and secondary connections.

Refer to specification Section 26 25 13 Removing and Modifying Existing Equipment, Part 3, 3.02.B.4, 3.02.D.5, 3.02.E.2.a, 3.02.E.3.a and 3.02.E.4.a.

Refer to specification Section 26 22 16 Power Transformers, Part 1 1.08.A, Part 2 2.01.K, 2.02.A.3.d, 2.02.A.4.C and Part 3 3.01.H.

Refer to specification drawings 416-D-1580 (Sheet 15), 416-D-1588 (Sheet 29), 416-D-1366 (Sheet 43), 416-D-1994 (Sheet 44), 416-M-000046-50 = Y1000-1 (Sheet 49) and 416-M-000046-54 = Y1001 (Sheet 51).

Question 4: Spec Section 26 28 30 - 4: Is the contractor Responsible to add the new breakers into the govt's

HMI including all visible on screen work interface and modeling?

Answer: Yes, the contractor is responsible for adding the new breakers into the Government’s HMI including all visible on screen work interface and modeling. Refer to specification Section 26 28 30

Enclosed Circuit Breakers, Part 1, 1/01.A.l “Cost of labor and equipment required to program and calibrate new equipment and existing interface equipment.”

Also refer to specification Section 26 23 30 Enclosed Circuit Breakers, Part 2, 2.01.A.2. “The contractor shall program and calibrate the existing station service equipment via the existing Eaton programmable logic controller…”

Question 5: Section 26 25 43-1 Non Segregated Bus:

a) Sect 1.03 states 6 low voltage buses are to removed and replaced but on 5 transformers? The 5 low voltage buses correspond to the 5 transformers that shall be replaced. The 6th low voltage bus corresponds to the new low voltage bus that shall be installed on the load side of the existing JF Carr KRB Transformer.

Refer to specification Section 26 25 43 600-Volt Enclosed Non-Segregated Phase Bus, Part 2, 2.02. The contractor shall remove the existing four 500 Kcmil cables on the line and load side of the existing 52C circuit breaker between the JF Carr KRB Transformer and the existing station service switchgear. The contractor shall “replace the existing 500 Kcmil cable with new rigid bus…”

The JF Carr KRB transformer was replaced in 2014 and is not part of this project.

b) Is the 6th Buss referred to as to be replaced referring to the section of cable buss? Or is the intent to removal all Secondary Non-Segregated buss on all 6 XFMR and replace as well as the section of Cable buss-

Answer: Refer to the answer to Question 5.a above.

Question 6: Section 26 25 13 – 8

For the Portable Generators at Carr and Spring Creek, Is the contractor only responsible to add a Disconnect sized appropriately or is there a specific outdoor Outlet the Govt. would like as well?

Answer: The contractor is responsible for designing, furnishing, installing and testing connections for the existing portable generator at JF Carr and Spring Creek Powerplants.

Refer to specification Section 26 25 13 Removing and Modifying Existing Equipment, Part 1, 1.04.D.1.a and Part 3, 3.03.C.1.

There is an existing outlet/disconnect system at the Keswick Main Office Building which is used to connect to the portable generator. The contractor is expected to provide a similar system. The contractor can contact Steve Holmes for a future site visit of this system.

For Question 7-8

According to Section H-Special Contract Requirements, Part 1: Special Instructions to the Contractor-Special Limitations to the Work Period.

Judge Frances Carr Powerplant Construction Start: January 11, 2018 Construction End: April 4, 2018

Spring Creek Powerplant Construction Start: January 11, 2018 Construction End: April 4, 2018

Trinity Powerplant Construction Start: October 15, 2018 Construction End: January 4, 2019

This has the work at Judge Frances Carr and Spring Creek going concurrently, then over a 5 month no work period to start Trinity.

Question 7: Would the contractor be able to store materials at Trinity during the summer no-work period if it was cost effective to have the materials for all 3 plants delivered to the Redding area at the same time?

Answer: The contractor will not be able to store materials at the Trinity Powerplant as other projects are presently scheduled.

Question 8: Would the contractor be able to work at all 3 plants concurrently January 11 to April 4 if they had the manpower and supervision to do so?

Answer: The contractor will not be approved to work all 3 plants concurrently. Please plan accordingly to Section H.

Question 9: Section 01 11 00 Scope of Work, Paragraph B; Section 26 25 13 Removing and Modifying

Existing Equipment, Paragraph 3.01 C; Section 26 25 43 600-Volt Enclosed Non-Segregated Phase Bus, Paragraph 2.02. There are confusing scope requirements between specification sections for the JF Carr non-segregated phase bus between transformer KRB and breaker 52C. Confirm we are to only extend the existing bus to the breaker and not replace it entirely from transformer KRB.

Answer: The specification requires that the contractor replace the four 500 Kcmil cables from the load side of the JF Carr KRB transformer to the existing 52C circuit breaker and from the load side of the

52C circuit breaker to the existing station service switchgear. There is no bus to extend because the existing installation is 500 Kcmil cable.

Refer to specification Sections 26 25 13, Part 3 3.01.C and 26 25 43 Part 2, 2.02.

Specification Section 01 11 00 Scope of Work, Part 1, 1.02.B.1 states that the contractor shall remove and dispose of existing aluminum low voltage busway from each station service transformer to the station service switchgear including busway enclosure, conductor…”

Specification Section 26 25 13 paragraph 3.01 C refers to the low voltage bus and bus ducts from each of the existing five transformers. JF Carr KRB Transformer is not part of the 5 transformers.

But, Section 26 25 13 paragraph 3.01 D states that the contractor shall “remove the four 500 Kcmil cables that were installed on the line and load sides of the 52C circuit breaker between the JF Carr KRB transformer and the station service switchgear. Paragraph 3.02.C states that the contractor shall

“replace the four 500 Kcmil cables that were installed on the line and load sides of the existing 52C circuit breaker (located on the load side of the JF Carr KRB transformer), with new rigid bus…”

Specification Section 26 25 43 paragraph 2.02 explains again that the contractor shall remove the existing four 500Kcmil cables and replace with new low voltage bus.

Question 10: At the site visit attendees were shown where to install remote control switches in cubicles in the control room. This work is not mentioned in the scope requirements of the IFB. Please provide scope requirements for this work.

Answer: Specification Section 26 25 13 Removing and Modifying Existing Equipment, Part 1, 1.01.A.e states “Includes cost of labor, equipment and materials required to furnish and install the new remote operation circuits, cable and corresponding conduit.”.

Refer to the amended Spec Sections 26 25 13 Removing and Modifying Existing Equipment and 26 28

30 Enclosed Circuit Breakers for additional details of the remote control switches located in the respective control rooms.

Also refer to Section J, Attachment 5: JF Carr KRB Transformer – final as-built drawings – For

Information Only.

Question 11: There appears to be oil spills underneath several transformers. To what extent are we required to remediate these spills? Do we try to remove stains from the concrete?

Answer: Refer to revised Section 26 22 16 – Power Transformers, Part 3, 3.01.M “Clean up existing oil spills to the satisfaction of the OGR in the vicinity of the KRB and KRC transformers at each plant in a manner that complies with applicable Federal, State, and local laws and regulations in compliance with

Section 02 84 40 – Removal and Disposal of Polychlorinated Biphenyls (PCBs).”