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Powerdale Damage Assessment
November 14, 2006
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Based on Provisional Data. Gaging equipment suffered some malfunction during this event so hydrograph likely does not resemble rising limb. USGS is in the process of reconstructing this event.
Hood River at Tucker Bridge (USGS)Flow Event, 11/6/06 - 11/7/06
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Flo
w (
cfs)
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Silt at fish ladder
Entrance to fish ladder
Sorting facility fish return pipes
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Fish ladder
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Auxiliary fish ladder pump out of service
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Sand traps full of sediment
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Collapsed 10’ dia. wood stave flowline – 490’
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Steel flowline – 325’
– 170’ collapsed
– 155’ slid north 5 inches failing foundations
Walkway section lost downstream – location unknown
Foundation washed ¼ mile downriver
Flow
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Collapsed steel flowline –325’ requiring replacement
6 failed foundationsCracked supports (6 total) & slid pipe
170’155’
High water mark
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Damaged Seawall
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Cracked flowline foundations – 6 total
Crack at cold joint
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Sediment deposit at tailrace
River
Tailrace
Sediment deposit 6’ - 10’ above normal
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Powerhouse Switchyard
Chemical Storage
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Powerhouse Shop
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Powerhouse Shop
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Former River Channel
