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Visual Materials

Portal Powerhouse

Description: Portal Powerhouse - Staging for inserting I-beams and penstock into pipe.
Type: Visual Materials(Opens in new tab)
Date: 8/11/1955
Call number: photCL SCE 02 - 43651
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 - Outer end of 12' pipe showing install of I-beams for supporting penstock.
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Portal Powerhouse
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Portal Powerhouse - Penstock pipe in cribbing near outlet of Ward Tunnel welded together into pulling sections for installation in tunnel after start of outage.
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Portal Powerhouse
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Portal Powerhouse - Penstock and Wye ready for connection to by-pass pipe.
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Portal Powerhouse - Installation of I-beams.
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Portal Powerhouse - Progress picture
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Portal Powerhouse - Progress picture - First day of outage. Section of 12' diameter outlet pipe cut out and extending skid rails into tunnel for pulling penstock.
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Portal Powerhouse
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Portal Powerhouse - Installing backing I-beams (15") prior to forming for concrete. Strengthening to reduce vibration during high flows.
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