Visual Materials
Portal Powerhouse - r-notch weir near outlet conduit at toe of forebay dam. Staff gage reads .418
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Portal Powerhouse - Weir at downstream toe
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Portal Powerhouse - Weir at downstream toe - flow .023 cfs.
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Portal Powerhouse - Portal Forebay
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Portal Powerhouse - Portal Forebay - Downstream side of dam showing outlet end of 24" sluice pipe.
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Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - Upstream toe of rock fill section of forebay dam showing pervious filter layer in place between rock fill and impervious sections of embankment.
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Portal Powerhouse - Forebay
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Portal Powerhouse - Forebay - ["V" Weir measuring seepage at dam]
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