CANYON LAKE - SD00000-128

Dam Name: CANYON LAKE
State: SD
Downstream Hazard Potential:
Incident Type: Failure
Incident Date: 01/01/1972
Incident Driver: Hydrologic/Flooding
Incident Mechanism 1: Overtopping
Incident Mechanism 2
Incident Mechanism 3
Incident IDSD00000-128
Incident Description
Named Hydrologic Event
EAP Enacted (Y/N) due to IncidentNo
Fatalities (Number)33
Number of People Evacuated
Number of Habitable Structures Evacuated
Number of Habitable Structures Flooded
Other Infrastructure Impacts
Economic Damages (in $)$50 million to $100 million
Response
Volume released at failure (ac-ft)
Additional Remarks or Updates237-238 killed - 33 from dam failure? $60-164 million in damages; 3,000 injured. “The safety inspection and repair program was spurred by the collapse of a dam built & operated by the city near Rapid City, S.D., in 1972. More than 200 persons died and d
Fatalities: 33 -
Owner Type
Dam TypeRE
Primary Purpose(s)
EAP
Dam Height20 ft
Max Storage (ac-ft)
Surface Area (acres)0.00
Year Completed
NID NumberSD00000
River Name
Latitude0
Longitude0
Year Modified
Regulatory Agency(ies)
Incident Time
Incident Duration
Incident Report Produced
Information Sources
Attachments