HANSKA LAKE - MN00070-3261
Dam Name: HANSKA LAKE
State: MN
Downstream Hazard Potential:
Incident Type: Non-Failure
Incident Date: 03/21/2019
Incident Driver: Hydrologic/Flooding
Incident Mechanism 1: Erosion
Incident Mechanism 2Overtopping
Incident Mechanism 3
Incident IDMN00070-3261
Incident DescriptionFlooding due to spring runoff. Spilling around the west side of the dam causing scour erosion.
Named Hydrologic Event
EAP Enacted (Y/N) due to IncidentNo
Fatalities (Number)0
Number of People Evacuated0
Number of Habitable Structures Evacuated0
Number of Habitable Structures Flooded0
Other Infrastructure ImpactsNone
Economic Damages (in $)None
ResponseRiprap placed on west side of the structure to stop erosion.
Volume released at failure (ac-ft)
Additional Remarks or UpdatesWorking on redesign. Structure overtops frequently. Rebuild will be jurisdictional, existing dam is not.
Owner TypeS
Dam TypeREPG
Primary Purpose(s)
EAPNR
Dam Height6 ft
Max Storage (ac-ft)13777.00
Surface Area (acres)1740.00
Year Completed1930
NID NumberMN00070
River NameWATONWAN RIVER - TR
Latitude44.11
Longitude-94.5663
Year Modified
1986
Regulatory Agency(ies)MNDNR
Incident Time
Incident Duration1 day
Incident Report ProducedYes
Information SourcesMNDNR
