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Visual Materials

Portal Powerhouse

Description: Portal Powerhouse - Forms being erected for substructure concrete at powerhouse.
Type: Visual Materials(Opens in new tab)
Date: 8/17/1955
Call number: photCL SCE 02 - 43624
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 - View of forming for substructure concrete, showing neat excavation in tight decomposed granite for the draft tube encasement.
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Portal Powerhouse - Forms for Generator Foundation. Concrete work to start July 3, 1956.
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Portal Powerhouse - Forebay - Showing forms for concrete spillway crest.
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Portal Powerhouse - Last concrete being placed for season in expansion joint housing.
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Portal Powerhouse - Placing reinforcing steel for concrete disc, steel plate bulkhead.
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