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Visual Materials

Portal Powerhouse

Description: Portal Powerhouse - Undercutting of southwest abutment of Highway 168 bridge under Potter Creek
Type: Visual Materials(Opens in new tab)
Date: 1/17/1956
Call number: photCL SCE 02 - 43945
Find out more: View in the Huntington Digital Library(Opens in new tab); View in the Library catalog(Opens in new tab)

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Portal Powerhouse - Ward Tunnel discharge about 200 cfs from State Highway south of Potter Creek Bridge.
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Portal Powerhouse - Progress picture showing lower end of Potter Creek diversion returning to main channel just upstream from highway bridge.
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Portal Powerhouse - View from highway bridge showing excavation progress in tailrace channel section isolated by diverting flow into Potter Creek Tunnel.
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Portal Powerhouse - Farther down, under highway bridge after test flow.
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Portal Powerhouse
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