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Portal Powerhouse



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  • Big Creek, Huntington Lake Dams

    Big Creek, Huntington Lake Dams

    Visual Materials

    Big Creek, Huntington Lake Dams - Rock detention dike across Rancheria Creek approx. 1000 feet upstream from Portal Powerhouse Dike constructed to create stilling basin for overflow from surge chamber. Flow about 2 cfs.

    photCL SCE 02 - 44836

  • Portal Powerhouse

    Portal Powerhouse

    Visual Materials

    Portal Powerhouse - Outlet end and anchor on concrete overflow pipe from surge chamber.

    photCL SCE 02 - 44819

  • Portal Powerhouse - Forebay

    Portal Powerhouse - Forebay

    Visual Materials

    Portal Powerhouse - Forebay - Progress picture placing fill in dike embankment.

    photCL SCE 02 - 43550

  • Portal Powerhouse

    Portal Powerhouse

    Visual Materials

    Portal Powerhouse - First stage of Surge Tank excavation. Rock near top is decomposed granite.

    photCL SCE 02 - 44604

  • Portal Powerhouse

    Portal Powerhouse

    Visual Materials

    Portal Powerhouse - Diverting tunnel flow from Rancheria Creek channel across main channel and into Potter Creek channel.

    photCL SCE 02 - 43308

  • Portal Powerhouse - Forebay

    Portal Powerhouse - Forebay

    Visual Materials

    Portal Powerhouse - Forebay - Impervious fill upstream and start of rock fill in sluicepipe area of forebay dam.

    photCL SCE 02 - 43322