Wnoochee hydro: Balancing energy and environment
- Harza Northwest, Bellevue, WA (United States)
- Tacoma Public Utilities, WA (United States); and others
Construction of a hydroelectric generating facility at the existing Corps of Engineers (COE) Wynoochee Dam in western Washington was completed in early 1994 after a 10-year feasibility, licensing and permitting period. The retrofit components of the project include an 85-foot-high selective-withdrawal power intake on the upstream face of the concrete dam; a 1,250-foot-long, 10-foot-diameter steel penstock penetrating the dam; a powerhouse equipped with a Russian-made vertical Kaplan turbine-generator unit; and a 22.5-mile-long buried 34.5-kV transmission line. The maximum generating capacity of the project is 15.5 MW using flows varying between 200 and 1,300 cfs at heads between 115 and 165 feet. The estimated average annual energy output of the project is 40,000,000 KWh. The hydroelectric project is owned and operated by the City of Tacoma. The City of Aberdeen assisted in the project development as Tacoma`s partner and then became the new owner and operator of the dam.
- OSTI ID:
- 220206
- Report Number(s):
- CONF-9507190--
- Country of Publication:
- United States
- Language:
- English
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