OROVILLE - CA00035-3097
Incident ID CA00035-3097
Dam Name OROVILLE
Downstream Hazard Potential H
State CA
Incident Date 02/07/2017
Incident Type Non-failure
Incident Driver Deterioration Or Poor Condition
Incident Mechanism 1 Erosion
Incident Mechanism 2
Incident Mechanism 3
Incident Description Service and emergency spillway failures
Named Hydrologic Event
EAP Enacted (Y/N) due to Incident Yes
Fatalities (Number)
Number of People Evacuated 188000
Number of Habitable Structures Evacuated Unknown
Number of Habitable Structures Flooded
Other Infrastructure Impacts None
Economic Damages (in $) Unknown
Volume released at failure (ac-ft)
Response
Additional Remarks or Updates Long-term systemic failure of the CA DWR, regulatory, and general industry practices to recognize and address inherent spillway design and construction weaknesses, poor bedrock quality, and deteriorated service spillway chute conditions. Reconstruction of the flood constrol spillway completed November 1, 2018. Incident Description from Independent Forensic Team Report, Oroville Dam Spillway Incident, dated January 5, 2018
Incident Time
Incident Duration 2 days - Evacation order initiated February 12, 2017 and the order lifted February 14, 2017
Incident Report Produced Yes
Information Sources
Owner Type S
Dam Type ERRE
Primary Purpose(s) CHIRS
EAP Y
Year Completed 1968
Year Modified 0
Dam Height 770 ft
Max Storage (ac-ft) 3540000 ac-ft
Surface Area (acres) 15800 acres
River Name FEATHER RIVER
Latitude 39.5388
Longitude -121.485
Regulatory Agency(ies) DWR, SAFETY OF DAMS
NID Number CA00035
Attachments
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