|
Incident ID |
WI00403-3332 |
|
Dam Name |
MLSNA |
|
Downstream Hazard Potential |
H |
|
State |
WI |
|
Incident Date |
08/28/2018 |
|
Incident Type |
Failure |
|
Incident Driver |
Hydrologic/flooding |
|
Incident Mechanism 1 |
Abutment Failure |
|
Incident Mechanism 2 |
Erosion |
|
Incident Mechanism 3 |
|
|
Incident Description |
High flows resulted in breach and failure of auxiliary spillway and abutment |
|
Named Hydrologic Event |
|
|
EAP Enacted (Y/N) due to Incident |
Yes |
|
Fatalities (Number) |
0 |
|
Number of People Evacuated |
Unknown |
|
Number of Habitable Structures Evacuated |
Unknown |
|
Number of Habitable Structures Flooded |
Unknown |
|
Other Infrastructure Impacts |
Roads, Bridges |
|
Economic Damages (in $) |
|
|
Volume released at failure (ac-ft) |
|
|
Response |
|
|
Additional Remarks or Updates |
Significant town road, culvert, and bridge damages. Major streambank, pasture and ag field damages, personal driveways, culverts and fencing.
Didn't activate EAP because failure occurred quickly overnight. People were evacuated, numbers unknown. Assuming some wet basements. |
|
Incident Time |
|
|
Incident Duration |
1 day |
|
Incident Report Produced |
Yes |
|
Information Sources |
WI DNR |
|
Owner Type |
L |
|
Dam Type |
RE |
|
Primary Purpose(s) |
CD |
|
EAP |
Y |
|
Year Completed |
1956 |
|
Year Modified |
0 |
|
Dam Height |
35 ft |
|
Max Storage (ac-ft) |
257 ac-ft |
|
Surface Area (acres) |
18 acres |
|
River Name |
TR KNAPP CREEK |
|
Latitude |
43.7122 |
|
Longitude |
-90.7524 |
|
Regulatory Agency(ies) |
WIDNR |
|
NID Number |
WI00403 |
|
Attachments |
|
