|
Incident ID |
SD00026-3409 |
|
Dam Name |
MENNO DAM |
|
Downstream Hazard Potential |
H |
|
State |
SD |
|
Incident Date |
08/01/2019 |
|
Incident Type |
Non-failure |
|
Incident Driver |
Hydrologic/flooding |
|
Incident Mechanism 1 |
Spillway Erosion/head Cutting |
|
Incident Mechanism 2 |
Animal Activity |
|
Incident Mechanism 3 |
|
|
Incident Description |
Secondary spillway experienced significant heading cutting when it operated during both April and August of 2019. Erosion related to livestock grazing on the spillway likely contributed to the development of the issue. |
|
Named Hydrologic Event |
|
|
EAP Enacted (Y/N) due to Incident |
No |
|
Fatalities (Number) |
0 |
|
Number of People Evacuated |
0 |
|
Number of Habitable Structures Evacuated |
0 |
|
Number of Habitable Structures Flooded |
0 |
|
Other Infrastructure Impacts |
|
|
Economic Damages (in $) |
|
|
Volume released at failure (ac-ft) |
|
|
Response |
Owner increased monitoring of the dam and secondary spillway until it was repaired in Fall of 2019. |
|
Additional Remarks or Updates |
|
|
Incident Time |
|
|
Incident Duration |
|
|
Incident Report Produced |
|
|
Information Sources |
SD Dam Safety |
|
Owner Type |
S |
|
Dam Type |
RE |
|
Primary Purpose(s) |
R |
|
EAP |
Y |
|
Year Completed |
1935 |
|
Year Modified |
1996 |
|
Dam Height |
53 ft |
|
Max Storage (ac-ft) |
2050 ac-ft |
|
Surface Area (acres) |
48 acres |
|
River Name |
JAMES RIVER TRIBUTARY |
|
Latitude |
43.2617 |
|
Longitude |
-97.6167 |
|
Regulatory Agency(ies) |
DENR |
|
NID Number |
SD00026 |
|
Attachments |
|
