MITSUBISHI BIPLANE VALVE GORGE POWERHOUSE SEEN FROM THE SOUTH. THE MITSUBISHI BIPLANE VALVES WERE INSTALLED IN 1980 AND REPLACED LARNERJOHNSON NEEDLE VALVES ON UNITS 21, 22, AND 23, 1989. Skagit Power Development, Gorge Powerhouse, On Skagit River, mile upstream from Newhalem, Newhalem, Whatcom County, WA Ross, J D Jorgenson, Lars

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