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Visual Materials

Portal Powerhouse

Description: Portal Powerhouse - Excavation for spill pipe of Surge Tank.
Type: Visual Materials(Opens in new tab)
Date: 6/28/1956
Call number: photCL SCE 02 - 44605
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 - Surge Tank excavation.
photCL SCE 02 - 44602
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Portal Powerhouse - First stage of Surge Tank excavation. Rock near top is decomposed granite.
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Portal Powerhouse - Outlet end and anchor on concrete overflow pipe from surge chamber.
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Portal Powerhouse - Continuance of washing daused by break-through of seepage water from diversions. Discharge was reduced to eliminate auxiliary spill in pipe.
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Portal Powerhouse - Excavation to uncover lower end of 12' pipe.
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