Bonnenville Power House

The Department of the Army, US Army Corps of Engineers, Portland District has a requirement for construction services for Bonneville Power House 1 Site Prep & Trashrack Replacement located in Cascade Locks, OR.

Solicitation Summary

The Department of the Army, US Army Corps of Engineers, Portland District has a requirement for construction services for Bonneville Power House 1 Site Prep & Trashrack Replacement located in Cascade Locks, OR.

Solicitation in a Nutshell

Item

Details
Agency Department of the Army, US Army Corps of Engineers, Portland District
Solicitation Number W9127N25R0020
Status Pre-RFP
Solicitation Date 09/2025 (Estimate)
Award Date 11/2025 (Estimate)
Contract Ceiling Value $25,000,000
Competition Type Undetermined
Type of Award Other
Primary Requirement  Other Construction Services
Duration N/A
Contract Type  Firm Fixed Price
No. of Expected Awards N/A
NAICS Code(s):
237990

Other Heavy and Civil Engineering Construction
Size Standard: $45.0 million annual receipts except $37.0 million annual receipts for Dredging and Surface Cleanup Activities
Place of Performance:
  • Cascade Locks, Oregon, United States
Opportunity Website: https://sam.gov/opp/b52caa828f6a4b8d81eb8600bce24137/view

Background

Bonneville’s 1st Powerhouse has 10 main units and one station service unit requiring new intake trash racks. Each main unit consist of three slots. Each slot has six racks – one bottom and five top racks. The station service unit has one top rack, four intermediate racks and one bottom rack. All main unit trash racks are similar in design. The existing Bonneville Powerhouse I trash racks were originally installed in 1937 and are now 80 years old. As part of annual maintenance, these trash racks are cleaned and inspected, except the lower racks which are left in place to prevent debris from entering the units. The last time the lower trash racks were removed and inspected was 1983.

Requirements

  • The following information represents the project objectives:
  • Pre-site survey.
  • Fabrication and installation of 162 – 22′-1 1/4″ long, 1′-7 1/2″ wide x 12′ tall new trash racks.
  •  Removal and disposal of 174 existing trash racks. Disposal of an additional 29 existing trash racks that are being stored onsite.
  • Debris removal or debris relocation (brush, tree trunks, etc.), and relocation of sediment to ensure successful installation of the trashracks. The volume of debris and sediment is approximately 800 cubic yards total in a 20 ft by 1000 ft area, down to a -2 EL., at an approximate water depth of 70 feet.
  • This large volume is assumed necessary so that the area stays clear long enough for the trashrack installation work to occur. This volume could be reduced if schedule sequencing is in such a way that the trashrack removal/installation can follow quickly behind the debris removal/relocation.
  • Debris includes 12″-24″ diameter trees. There are some 36″ diameter trees that cross multiple units.
  • Debris in front of the units ranges 1-15 feet.
  • Debris removal/relocation behind existing trashracks, as necessary, to install the new trashracks.
  •  The trashracks spacing is 6” on center.
  • Installation of 162 new trash racks and 12 additional trash racks that are already onsite.

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