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Visual Materials

Portal Powerhouse

Description: Portal Powerhouse - Progress picture showing lower end of Potter Creek diversion returning to main channel just upstream from highway bridge.
Type: Visual Materials(Opens in new tab)
Date: 7/18/1955
Call number: photCL SCE 02 - 43303
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 - Potter Creek channel used as temporary diversion. View from Hwy Bridge looking upstream.
photCL SCE 02 - 43647
Portal Powerhouse
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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.
photCL SCE 02 - 43562
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Portal Powerhouse - Starting to fill Potter Creek temporary diversion channel after returning tunnel flow to permanent tailrace.
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Portal Powerhouse - Progress picture
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Portal Powerhouse - Progress picture - Excavation in diversion channel to Rancheria Creek.
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Portal Powerhouse - Progress picture Portal, Phoenix Const. Co., rock crusher at left. [Ward Tunnel outlet and exposed section upstream where cut will be made for diversion]
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Portal Powerhouse - Undercutting of southwest abutment of Highway 168 bridge under Potter Creek
photCL SCE 02 - 43945