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Visual Materials

Portal Powerhouse

Description: Portal Powerhouse - Emergency ditch dug to control increased flow thru bank at lower left.
Type: Visual Materials(Opens in new tab)
Date: 9/22/1955
Call number: photCL SCE 02 - 43735
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 - Downstream thru spray chamber at approx. 1800 cfs flow thru Ward Tunnel.
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Portal Powerhouse
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Portal Powerhouse - Channel below powerhouse structure, flow approx. 1800 cfs thru Ward Tunnel.
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Portal Powerhouse - 1500 cfs flow thru by-pass pipe with unrestricted end area.
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Portal Powerhouse - Another view of discharge at approximately 1500 cfs flow thru tunnel.
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Portal Powerhouse - Water leakage through toe of tunnel dump fill between diversion ditch and powerhouse area during 490 c.f.s. flow.
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Portal Powerhouse - View of tunnel diversion during test flow of 490 cfs. Flow in diversion ditch from 12' pipe to junction with Rancheria Creek channel.
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