Nathaniel Washington Transformer Replacement

The Department of Interior, Bureau of Reclamation has a requirement for a construction contract to supply and install six (6) 276 MVA, 45-degree rise, single-phase, outdoor, step-up transformers. Three (3) single-phase transformers will be connected on the high voltage side in wye and on the low voltage side in delta to create a three-phase connected bank. Installation will occur over two different outage periods, one bank of three transformers per outage. The work will be located at the Nathaniel “Nat” Washington Power Plant (formerly named the Third Power Plant) at Grand Coulee Dam, adjacent to the Cities of Grand Coulee and Coulee Dam, Washington, approximately 90 miles west of Spokane, Washington, in Okanogan County.

Solicitation Summary

The Department of Interior, Bureau of Reclamation has a requirement for a construction contract to supply and install six (6) 276 MVA, 45-degree rise, single-phase, outdoor, step-up transformers. Three (3) single-phase transformers will be connected on the high voltage side in wye and on the low voltage side in delta to create a three-phase connected bank. Installation will occur over two different outage periods, one bank of three transformers per outage. The work will be located at the Nathaniel “Nat” Washington Power Plant (formerly named the Third Power Plant) at Grand Coulee Dam, adjacent to the Cities of Grand Coulee and Coulee Dam, Washington, approximately 90 miles west of Spokane, Washington, in Okanogan County.

Solicitation in a Nutshell

Item

Details
Agency Department of Interior, Bureau of Reclamation
Solicitation Number 140R1025R0003
Status Pre-RFP
Solicitation Date 10/2025 (Estimate)
Award Date 01/2026 (Estimate)
Contract Ceiling Value $150,000,000
Competition Type Undetermined
Type of Award Other
Primary Requirement  Other Construction Services
Duration N/A
Contract Type TBD
No. of Expected Awards N/A
NAICS Code(s):
335311

Power, Distribution and Specialty Transformer Manufacturing
Size Standard: 800 Employees
Place of Performance:
  • Washington, United States
Opportunity Website: https://sam.gov/opp/ed59e1306e264a7db0ac2315d7291d6e/view

Background

N/A

Requirements

The principal components of work will be:

  • Remove and dispose of three (3) GSU transformers from in-service operations.
  • Remove and dispose of four (4) GSU transformers from spare locations.
  • Remove and reinstall three (3) GSU transformers from in-service operation to spare.
  • Furnishing, installing, and commissioning two sets of three in-service generator step-up power transformers (total of six transformers).
  • Furnishing and installing new seismic anchorage systems for the new transformers.
  • Modify existing isolated phase bus for new transformers.

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