Rock Island Powerhouse 1 Unit B-8 Draft Tube Modifications

This contract involves the modification of the draft‑tube assembly for Unit B‑8 at the Rock Island Hydroelectric Powerhouse owned by Chelan Public Utility District. The scope includes constructing a cofferdam, dewatering the turbine area, surveying and mapping sidewalls, drilling and installing anchors, placing reinforcing steel, forming and pouring concrete, and finishing/grouting to achieve a new hydraulic profile consistent with existing units. The work is a specialist civil‑hydro construction effort that mirrors prior modifications on Units B‑5, B‑6, B‑7, and B‑9. The contract was awarded to J.F. Brennan Company, Inc. for $1,537,000. • Primary activity: Cofferdam construction, dewatering, concrete work, and hydraulic profile modification of a hydro‑electric draft tube. • Location: Rock Island Powerhouse, Chelan County, Washington (Chelan Public Utility District). • Awarded vendor: J.F. Brennan Company, Inc. (single‑award, lump‑sum value $1.537 M). • Solicitation details: Labor & Materials solicitation (Solicitation Number 24‑13700) published May 6 2025, bid opening June 10 2025.