Portal Powerhouse

Description: Portal Powerhouse - Surge Tank excavation.
Type: Visual Materials(Opens in new tab)
Date: 6/28/1956
Call number: photCL SCE 02 - 44602
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 - Surge Tank excavation.
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Portal Powerhouse - Excavation for spill pipe of Surge Tank.
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Portal Powerhouse - First stage of Surge Tank excavation. Rock near top is decomposed granite.
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Portal Powerhouse - Further excavation for Portal Powerhouse.
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Portal Powerhouse - Starting reinforcing steel for upper portion of surge chamber structure.
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Portal Powerhouse - Outlet end and anchor on concrete overflow pipe from surge chamber.
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