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Visual Materials

Portal Powerhouse

Description: Portal Powerhouse - Preparatory work prior to penstock erection. New penstock supporting rails shown partially installed.
Type: Visual Materials(Opens in new tab)
Date: 8/17/1955
Call number: photCL SCE 02 - 43625
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 - Progress picture
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Portal Powerhouse - Progress picture - First day of outage. Section of 12' diameter outlet pipe cut out and extending skid rails into tunnel for pulling penstock.
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Portal Powerhouse - Preparatory work along north side of Inlet Channel to Shaft
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Portal Powerhouse - Preparatory work along north side of Inlet Channel to Shaft - prior to replacement of impervious blanket washed from slope by Spring and Summer rains.
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Portal Powerhouse - Showing new support pier prior to construction of access pit.
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Portal Powerhouse - Lower Portal release from Ward Tunnel prior to Portal Powerhouse construction.
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Portal Powerhouse - Forebay - Partially complete intake channel excavation shown Camp 61 shaft
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Portal Powerhouse - Forebay - Partially complete intake channel excavation shown Camp 61 shaft - up right.
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Portal Powerhouse
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Portal Powerhouse - Placing concrete in supporting wall under end of 12' diameter pipe. Excavating old concrete anchor. [Forming new] foundation & Wye branch anchor.
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