Developer eyes 2,000-MW Sentinel Mountain for Washington State

United Power Corp. is studying the feasibility of developing a 2,000-MW Sentinel Mountain Pumped-Storage project in Washington’s Grant and Adam counties.

The Federal Energy Regulatory Commission issued a three-year preliminary permit (No. 12759) to United Power, of Monmouth, Ore. The permit expires March 31, 2010.

United Power proposes building Sentinel Mountain on Crab Creek and Moses Lake. It would include two new dams, an upper reservoir, lower reservoir, and two powerhouses containing four units.

The project would be expected to generate about 2,628 gigawatt-hours annually, for sale to a local utility.

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