Coon Creek 23 dam
Coon Creek 23
Coon Creek 23, also known as Opsahl/Blihovde, is a local government-owned dam located in Monroe, Wisconsin. Constructed in 1961 by the USDA NRCS, this earth dam serves the primary purpose of flood risk reduction along the Un Trib Rullands Coulee Creek. With a height of 39 feet and a hydraulic height of 25 feet, the dam has a moderate risk assessment level of 3 and a low hazard potential.
Despite being state regulated and permitted by the WIDNR, the condition assessment of Coon Creek 23 is currently marked as unsatisfactory, with the last inspection conducted in May 2016. The dam has a storage capacity of 95.5 acre-feet and a maximum discharge of 368 cubic feet per second. While the dam's spillway is uncontrolled, the risk management measures and emergency action plan for the structure are not currently available. Overall, Coon Creek 23 presents an intriguing case study for water resource and climate enthusiasts, highlighting the importance of ongoing maintenance and assessment for dam safety and flood risk reduction efforts.
Dam data reference
Condition Assessment
- Satisfactory
- No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
- Fair
- No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action.
- Poor
- A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency.
- Unsatisfactory
- A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
- Not Rated
- The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Hazard Potential Classification
- High
- Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
- Significant
- Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environmental damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
- Low
- Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
- Undetermined
- Dams for which a downstream hazard potential has not been designated or is not provided.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Coon Creek 23 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Kickapoo River At State Highway 33 At Ontario | 149 cfs | → |
| La Crosse River At Sparta | 209 cfs | → |
| Kickapoo River At La Farge | 250 cfs | → |
| La Crosse River Near La Crosse | 408 cfs | → |
| Black River Near Galesville | 1,640 cfs | → |
| Lemonweir River At New Lisbon | 326 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Coon Creek 23.
Boat launches
- State Highway 162 Bangor
- State Highway 131 La Farge
- Sidie Hollow Lake -- Access
- West Main Street La Farge
- Neshonoc Lake -- Access
- Town Of Angelo
Campgrounds
- Leon Valley Campground
- Esofea - Rentz Memorial Park
- Esofea/Rentz Memorial Park Campground
- Sparta Walk-In Campground
- Campsite T
- Wildcat Mountain State Park
Fishing spots
- New Albin Big Lake
- French Creek
- Little Paint Creek
- Franklin St. Fishing Pier
- Paint Creek
- Huff Street Fishing Pier
Paddle runs
- The Big Green River To The River's Mouth At The Mississippi River
- Western Boundary Of Effigy Mounds National Monument To Boundary Of Effigy Mounds National Monument
- The "Lower" Dam, Near The Confluence Of Coon Creek To Lane's Bridge
- Lone Rock To The Confluence Of The Green And Wisconsin Rivers
Track Coon Creek 23 in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Coon Creek 23
Where does the data for Coon Creek 23 come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the Low hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Coon Creek 23.