HANSKA LAKE - MN00070-3261
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
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