|
Incident ID |
SD01091-3406 |
|
Dam Name |
LAKE CORSICA DAM |
|
Downstream Hazard Potential |
H |
|
State |
SD |
|
Incident Date |
09/11/2019 |
|
Incident Type |
Non-failure |
|
Incident Driver |
Hydrologic/flooding |
|
Incident Mechanism 1 |
High Reservoir Level |
|
Incident Mechanism 2 |
Gate/valve Failure |
|
Incident Mechanism 3 |
|
|
Incident Description |
Heavy 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 Evacuated |
unknown |
|
Number of Habitable Structures Evacuated |
unknown |
|
Number of Habitable Structures Flooded |
unknown |
|
Other Infrastructure Impacts |
|
|
Economic Damages (in $) |
|
|
Volume released at failure (ac-ft) |
|
|
Response |
Downstream 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. |
|
Additional Remarks or Updates |
The secondary spillway also operated which discharges across the access road into and through part of the camp ground/ recreation area directly below the dam. |
|
Incident Time |
|
|
Incident Duration |
|
|
Incident Report Produced |
|
|
Information Sources |
SD Dam Safety |
|
Owner Type |
L |
|
Dam Type |
RE |
|
Primary Purpose(s) |
R |
|
EAP |
Y |
|
Year Completed |
1939 |
|
Year Modified |
1986 |
|
Dam Height |
32 ft |
|
Max Storage (ac-ft) |
2020 ac-ft |
|
Surface Area (acres) |
116 acres |
|
River Name |
CHOTEAU CREEK |
|
Latitude |
43.41 |
|
Longitude |
-98.2983 |
|
Regulatory Agency(ies) |
DENR |
|
NID Number |
SD01091 |
|
Attachments |
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