Dams / Fisheries / Hydro – Slayden Constructors, Inc.

Cabinet Gorge Dam Fish Passage Facility

Project Stats Owner: Avista Corporation Value: $27M Method: CM/GC Location: Clark Fork, ID This project was the result of several years of value engineering and preconstruction services that provided feasibility for construction of a new trap-and-haul fish passage in the tailrace of the dam. The facility is designed primarily for the Bull Trout species, which…

Minto Adult Fish Collection Facility

This project was an existing site of an out dated fish collection facility used to trap and haul Endangered Species Act listed fish around Detroit and Big Cliff dams on the right bank of the North Santiam River near Gates, OR. This high-profile project between State Hwy 22 and the North Santiam River required close…

John Day North Fish Ladder Entrance Improvements

This work is for improvements to the entrance (downstream end) of the north shore fish ladder. The improvements are to address existing fish passage delays. Work elements include water management, dive work, partial demolition and rebuilding of the fish ladder entrance for a variable width weir, and new stoplogs and stoplog guide slots, steel fabrication,…