LAKE CORSICA DAM - SD01091-3406
Dam Name: LAKE CORSICA DAM
State: SD
Downstream Hazard Potential: H
Incident Type: Non-Failure
Incident Date: 09/11/2019
Incident Driver: Hydrologic/Flooding
Incident Mechanism 1: High Reservoir Level
Incident Mechanism 2Gate/Valve Failure
Incident Mechanism 3
Incident IDSD01091-3406
Incident DescriptionHeavy rainfall over already wet watershed resulted in a high reservoir level. The low level outlet gate was also damaged during the event causing it to discharge uncontrolled flow.
Named Hydrologic Event
EAP Enacted (Y/N) due to Incident
Fatalities (Number)0
Number of People Evacuatedunknown
Number of Habitable Structures Evacuatedunknown
Number of Habitable Structures Floodedunknown
Other Infrastructure Impacts
Economic Damages (in $)
ResponseDownstream campground was closed for a period of time after the event, dam owner and county emergency manager contacted state dam safety staff on additional actions and monitoring needed, state dam safety staff inspected the dam five days after the event.
Volume released at failure (ac-ft)
Additional Remarks or UpdatesThe secondary spillway also operated which discharges across the access road into and through part of the camp ground/ recreation area directly below the dam.
Owner TypeL
Dam TypeRE
Primary Purpose(s)R
EAPY
Dam Height32 ft
Max Storage (ac-ft)2020.00
Surface Area (acres)116.00
Year Completed1939
NID NumberSD01091
River NameCHOTEAU CREEK
Latitude43.41
Longitude-98.2983
Year Modified
1986
Regulatory Agency(ies)DENR
Incident Time
Incident Duration
Incident Report Produced
Information SourcesSD Dam Safety
