WANAPUM - WA00085-2000
Dam Name: WANAPUM
State: WA
Downstream Hazard Potential: H
Incident Type: Non-Failure
Incident Date: 02/28/2014
Incident Driver: Unknown
Incident Mechanism 1: Under Investigation
Incident Mechanism 2
Incident Mechanism 3
Incident IDWA00085-2000
Incident DescriptionAn engineer noticed a slight irregular bowing above the spillway gates Divers found a 2-inch-wide crack that stretched for 65 feet along the base of one of the dam's spillway piers.
Named Hydrologic Event
EAP Enacted (Y/N) due to IncidentYes
Fatalities (Number)
Number of People Evacuated0
Number of Habitable Structures Evacuated
Number of Habitable Structures Flooded
Other Infrastructure Impacts
Economic Damages (in $)
Response
Volume released at failure (ac-ft)
Additional Remarks or UpdatesGrant County authorities have activated an emergency-response plan. Officials said there is no threat to the public from the crack. The owner lowered water levels a total of 20 feet. After the lowering the crack closed and the monolith moved 1.75 inches back upstream
Owner TypeU
Dam TypePGERCN
Primary Purpose(s)HCR
EAPY
Dam Height206 ft
Max Storage (ac-ft)796000.00
Surface Area (acres)14590.00
Year Completed1965
NID NumberWA00085
River NameCOLUMBIA RIVER
Latitude46.8731
Longitude-119.97
Year Modified
Regulatory Agency(ies)Federal Energy Regulatory Com
Incident Time
Incident Duration
Incident Report Produced
Information Sources
