MLSNA - WI00403-3332
Dam Name: MLSNA
State: WI
Downstream Hazard Potential: H
Incident Type: Failure
Incident Date: 08/28/2018
Incident Driver: Hydrologic/Flooding
Incident Mechanism 1: Abutment Failure
Incident Mechanism 2Erosion
Incident Mechanism 3
Incident IDWI00403-3332
Incident DescriptionHigh flows resulted in breach and failure of auxiliary spillway and abutment
Named Hydrologic Event
EAP Enacted (Y/N) due to IncidentYes
Fatalities (Number)0
Number of People EvacuatedUnknown
Number of Habitable Structures EvacuatedUnknown
Number of Habitable Structures FloodedUnknown
Other Infrastructure ImpactsRoads, Bridges
Economic Damages (in $)
Response
Volume released at failure (ac-ft)
Additional Remarks or UpdatesSignificant 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.
Didn't activate EAP because failure occurred quickly overnight. People were evacuated, numbers unknown. Assuming some wet basements.
Owner TypeL
Dam TypeRE
Primary Purpose(s)CD
EAPY
Dam Height35 ft
Max Storage (ac-ft)257.00
Surface Area (acres)18.00
Year Completed1956
NID NumberWI00403
River NameTR KNAPP CREEK
Latitude43.7122
Longitude-90.7524
Year Modified
Regulatory Agency(ies)WIDNR
Incident Time
Incident Duration1 day
Incident Report ProducedYes
Information SourcesWI DNR
