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Visual Materials

Portal Powerhouse

Description: Portal Powerhouse - Ward Tunnel discharge about 200 cfs from State Highway south of Potter Creek Bridge.
Type: Visual Materials(Opens in new tab)
Date: 1/17/1956
Call number: photCL SCE 02 - 43943
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
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Portal Powerhouse - Tailrace channel from highway bridge. Approx. 1850 cfs flow from Ward Tunnel and Rancheria Creek.
photCL SCE 02 - 44564
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Portal Powerhouse - Discharge at approximately 1800 cfs flow through Ward Tunnel.
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Portal Powerhouse - South side of channel, vicinity of highway bridge after 1100 cfs test flow.
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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 - Tailrace channel under highway bridge after 1800 cfs flows.
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