|
Incident ID |
MN00070-3261 |
|
Dam Name |
HANSKA LAKE |
|
Downstream Hazard Potential |
|
|
State |
MN |
|
Incident Date |
03/21/2019 |
|
Incident Type |
Non-failure |
|
Incident Driver |
Hydrologic/flooding |
|
Incident Mechanism 1 |
Erosion |
|
Incident Mechanism 2 |
Overtopping |
|
Incident Mechanism 3 |
|
|
Incident Description |
Flooding due to spring runoff. Spilling around the west side of the dam causing scour erosion. |
|
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 |
None |
|
Economic Damages (in $) |
None |
|
Volume released at failure (ac-ft) |
|
|
Response |
Riprap placed on west side of the structure to stop erosion. |
|
Additional Remarks or Updates |
Working on redesign. Structure overtops frequently. Rebuild will be jurisdictional, existing dam is not. |
|
Incident Time |
|
|
Incident Duration |
1 day |
|
Incident Report Produced |
Yes |
|
Information Sources |
MNDNR |
|
Owner Type |
S |
|
Dam Type |
REPG |
|
Primary Purpose(s) |
|
|
EAP |
NR |
|
Year Completed |
1930 |
|
Year Modified |
1986 |
|
Dam Height |
5 ft |
|
Max Storage (ac-ft) |
13777 ac-ft |
|
Surface Area (acres) |
1740 acres |
|
River Name |
WATONWAN RIVER - TR |
|
Latitude |
44.11 |
|
Longitude |
-94.5663 |
|
Regulatory Agency(ies) |
MNDNR |
|
NID Number |
MN00070 |
|
Attachments |
|
