WILLOW CREEK - CO01036-3173
Dam Name: WILLOW CREEK
State: CO
Downstream Hazard Potential: H
Incident Type: Non-Failure
Incident Date: 08/19/2017
Incident Driver: Manmade Action
Incident Mechanism 1: Other
Incident Mechanism 2
Incident Mechanism 3
Incident IDCO01036-3173
Incident DescriptionDuring 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 IncidentYes
Fatalities (Number)
Number of People Evacuated
Number of Habitable Structures Evacuated
Number of Habitable Structures Flooded
Other Infrastructure Impacts
Economic Damages (in $)
ResponseQuickly installed a temporary buttress, got pumps running and initiated a more diligent monitoring plan for the pumps, generators and slopes.
Volume released at failure (ac-ft)
Additional Remarks or UpdatesInitiated the construction EAP at an unusual condition level. EAP worked well and brought parties together.
Owner TypeS
Dam TypeRE
Primary Purpose(s)R
EAPY
Dam Height100 ft
Max Storage (ac-ft)36900.00
Surface Area (acres)1011.00
Year Completed1966
NID NumberCO01036
River NameWILLOW CREEK
Latitude40.7917
Longitude-106.947
Year Modified
Regulatory Agency(ies)DWR
Incident Time
Incident Duration
Incident Report ProducedYes
Information Sources
