A new privately owned 13.6-MW hydropower project is expected to produce 50,000 megawatt-hours annually at a Bureau of Reclamation dam on the Tieton River in Yakima County, Wash.
Tieton Hydropower LLC of Goldendale, Wash., is licensee of the new Tieton Dam project (No. 3701), commissioned in September. Electricity generated at the project is being sold to the Eugene, Ore., Water and Electric Board.
Mountain State Construction Co. was general contractor. Other contractors and subcontractors included: Atomic Electric, electrical installation; Machinery Installation and Maintenance Inc., mechanical installation; CHEC, turbine and generator supply; Summit Power Engineering, switchgear, control panels, and controls; East Cascade Electric, cable; and Christenson Electric, substation and transmission line.
INCA Engineers Inc., Bellevue, Wash., finalized detail design and prepared construction drawings and specifications for the owner. INCA reviewed contractors’ and manufacturers’ drawings, and inspected equipment. It also assisted the owner with construction monitoring, commissioning, and testing.