WILLOW CREEK - CO01036-3173
Incident ID CO01036-3173
Dam Name WILLOW CREEK
Downstream Hazard Potential H
State CO
Incident Date 08/19/2017
Incident Type Non-failure
Incident Driver Manmade Action
Incident Mechanism 1 Other
Incident Mechanism 2
Incident Mechanism 3
Incident Description During construction the downstream dewatering pumps quit due to a generator malfunction. Phreatic surface rose and a crack appeared in a construction cut slope on the downstream face.
Named Hydrologic Event
EAP Enacted (Y/N) due to Incident Yes
Fatalities (Number)
Number of People Evacuated
Number of Habitable Structures Evacuated
Number of Habitable Structures Flooded
Other Infrastructure Impacts
Economic Damages (in $)
Volume released at failure (ac-ft)
Response Quickly installed a temporary buttress, got pumps running and initiated a more diligent monitoring plan for the pumps, generators and slopes.
Additional Remarks or Updates Initiated the construction EAP at an unusual condition level. EAP worked well and brought parties together.
Incident Time
Incident Duration
Incident Report Produced Yes
Information Sources
Owner Type S
Dam Type RE
Primary Purpose(s) R
EAP Y
Year Completed 1966
Year Modified 0
Dam Height 100 ft
Max Storage (ac-ft) 36900 ac-ft
Surface Area (acres) 1011 acres
River Name WILLOW CREEK
Latitude 40.7917
Longitude -106.947
Regulatory Agency(ies) DWR
NID Number CO01036
Attachments
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