COON CREEK 21 - WI00373-3337
Incident ID WI00373-3337
Dam Name COON CREEK 21
Downstream Hazard Potential L
State WI
Incident Date 08/29/2018
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 0
Number of Habitable Structures Evacuated 0
Number of Habitable Structures Flooded 0
Other Infrastructure Impacts Bridges, Roads
Economic Damages (in $)
Volume released at failure (ac-ft)
Response
Additional Remarks or Updates Bridges, roads &culverts, farmstead outbuildings, sheds, private drives, cattle, fencing, equipment, RVs Abandoned house (rarely used when visiting property) knocked off foundation d/s of one of Coon Creek Dams. Report: http://www.co.monroe.wi.us/departments/land-conservation/ Activated EAP next morning after overnight failure
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 N
Year Completed 1963
Year Modified 0
Dam Height 46 ft
Max Storage (ac-ft) 271 ac-ft
Surface Area (acres) 2 acres
River Name TR RULLAND COULEE CREEK
Latitude 43.7314
Longitude -90.8419
Regulatory Agency(ies) WIDNR
NID Number WI00373
Attachments
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