RFI and Responses GA Spillway Transformer and Disconnects 8.16.24.pdf
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- Solicitation number
- W9128F24Q0055
About this file
This document contains Questions and Answers related to a solicitation for the Garrison Dam Spillway Transformers and Disconnects Replacement project, Solicitation # WQ9128F24Q0055. The solicitation is for a supply contract to replace the existing 13.8kV/480V spillway transformers, disconnect switches, and motor control centers at the Garrison Dam Powerplant. Responses to four specific questions are provided, covering topics such as breaker sizes and trip ratings, horizontal bus amps, and load lists. The CLIN 0001 is confirmed to be for the two 300kVA transformers only, without replacement of the existing disconnect switches. This solicitation is posted on SAM.gov, with the Contracting Office being the USACE Omaha District. Offerors are invited to arrange their own site visit if desired.
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Questions and Answers
Garrison Dam Spillway Transformers and Disconnects Replacement
Solicitation # WQ9128F24Q0055
16 August 2024
1. Per 2.4.1 the solicitation did not include breaker sizes or trip ratings. Can the customer provide for breakers sizes and trip ratings required for #3 through #14.
USACE Response: See document attachment in SAM.gov titled “Motor Control Center
Configuration” for breaker sizes and trip ratings.
2. Please address missing horizontal bus amps and the main device breaker trip ratings.
USACE Response: See following paragraph in specification 26 28 00.00 10:
2.8.2.1 Horizontal Bus
Provide each control center assembly with a three-phase main horizontal bus, with a continuous current rating not less than 600 amperes, located across the top of each vertical section. Drill the end of horizontal buses for future extensions.
3. Can you provide a load list or another oneline specific to the MCC portion?
USACE Response: Drawing sheet for E-901 is the one-line for the existing MCC. Circuit designations and breaker sizes for the new MCC can be found in the Motor Control
Center Configuration file. This file was uploaded to SAM.gov on 30 July 2024.
4. Please clarify whether CLIN 0001 is for the entire lineup including two (2) 300kVA transformers and two (2) disconnects or for just the two (2) transformers?
USACE Response: CLIN 0001 is for two (2) 300kVA transformers only. The disconnect switches integrated into the existing transformers will be removed without replacement. The price schedule has been amended to include one set of fused cutouts for the three-phase overhead line as indicated on sheet E-101 General Note 5.
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