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Bonneville Dam

Bonneville, Wash.

The project consisted of driving six 10 ft diameter piles down into bedrock. Pile lengths were 136 ft to 200 ft. The piles were drilled out and socketed into bedrock up to 30 ft. Rebar cages were installed full depth and the pile was filled with concrete. Pier caps were constructed on top of the pile. Twelve 7 ft. square precast box girder sections, ranging in length from 84 ft to 180 ft, were fabricated and set in pairs on top of the caps.

Ice Harbor Navigation Coffer Cells

Walla Walla, Wash.

Due to nitrogen super saturation that causes trauma to juvenile salmon, General Construction built the deflectors to the spillways which direct the flow of water horizontally to reduce the amount of nitrogen gas entrained in the water.

John Day Dam Flow Deflectors

Rufus, Ore.

The work included 8,000 cu yd of concrete and all work was coordinated with the operations of a fully functional flood control and power-generating dam. Despite unusually adverse river flows, the work was completed one year ahead of schedule.

Priest Rapids Dam Fish Bypass

Ephrata, Wash.

This project included the modification of two existing spillways to provide a temporary overflow route. The prototype consists of a series of steel stoplogs spanning the pier noses.

Wanapum Dam Fish Bypass

Vantage, Wash.

Features include a design-build concrete foundation poured underwater via tremie and precast boxes. The curved walls and flared floor of the chute were built in a 25 ft deep sheetpile coffercell. Stoplog guides, stoplogs and hoist, vertical and inclined gate guides and gates, and associated hydraulic and electrical controls were included in this project.

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