Portal Powerhouse

Description: Portal Powerhouse - Flattening south excavation slope between powerhouse site and tunnel diversion channel.
Type: Visual Materials(Opens in new tab)
Date: 8/9/1955
Call number: photCL SCE 02 - 43541
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 - South bank of powerhouse excavation with considerable seepage from tunnel diversion.
photCL SCE 02 - 43528
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Portal Powerhouse - Enlarging Potter Creek channel to handle tunnel flow during excavation of tail race channel.
photCL SCE 02 - 43302
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Portal Powerhouse - Tailrace channel excavation progress in section isolated by diverting tunnel discharge in Potter Creek Channel.
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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 - 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
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Portal Powerhouse - Manitowac Shovel excavating new diversion channel to south of 1955 diversion, for use during 1956.
photCL SCE 02 - 43895