Portal Powerhouse

Description: Portal Powerhouse - Last concrete being placed for season in expansion joint housing.
Type: Visual Materials(Opens in new tab)
Date: 10/15/1955
Call number: photCL SCE 02 - 43780
Find out more: View in the Huntington Digital Library(Opens in new tab); View in the Library catalog(Opens in new tab)

Daily: 10 A.M.–5 P.M.

Closed on Tuesdays

1151 Oxford Road
San Marino, CA 91108

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Portal Powerhouse
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Portal Powerhouse - First concrete in powerhouse being placed in pump sump.
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Portal Powerhouse
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Portal Powerhouse - Forms being erected for substructure concrete at powerhouse.
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Portal Powerhouse
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Portal Powerhouse - Placing reinforcing steel for concrete disc, steel plate bulkhead.
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Portal Powerhouse - Portal Forebay
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Portal Powerhouse - Portal Forebay - Bottom of vertical shaft in adit, shows upper portion of concrete bulkhead in adit.
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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
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Portal Powerhouse - Forms for Generator Foundation. Concrete work to start July 3, 1956.
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