Stillwell dam
Stillwell
Stillwell, also known as Stillwell Pond, is a Federal-owned recreational site located in Fort McCoy, Wisconsin. The dam, completed in 1944 by the US Army, is primarily used for recreation purposes and is classified as an Earth dam with a hydraulic height of 12 feet and a length of 240 feet. The reservoir has a storage capacity of 61 acre-feet and covers a surface area of 4 acres, making it a popular spot for outdoor enthusiasts.
Despite its low hazard potential, Stillwell dam poses a high risk due to its outdated Emergency Action Plan (EAP) and lack of risk assessment measures. The dam, managed and regulated by the US Army, has not undergone a condition assessment and its last inspection was conducted in 2016. With a designated inspection frequency of 4 years, there is a pressing need for updated emergency protocols and risk management strategies to ensure the safety of the surrounding area in the event of a potential breach.
Water resource and climate enthusiasts interested in Stillwell's infrastructure and risk profile will find this site intriguing for its historical significance and recreational value. As a Federal-owned dam managed by the US Army, there is a unique opportunity to explore the intersection of water resource management, recreation, and emergency preparedness at this picturesque location in Monroe County, Wisconsin.
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 Stillwell -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| La Crosse River At Sparta | 209 cfs | → |
| Kickapoo River At State Highway 33 At Ontario | 149 cfs | → |
| Black River Ds St Hwy 54 @ Black River Falls | 1,070 cfs | → |
| Lemonweir River At New Lisbon | 326 cfs | → |
| Yellow River At Necedah | 253 cfs | → |
| Kickapoo River At La Farge | 250 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Stillwell .
Boat launches
- Town Of Angelo
- Winnebago Park
- State Highway 162 Bangor
- Neshonoc Lake -- Access
- Neshonoc Lake -- Swarthout Park Boat Ramp
- State Highway 131 La Farge
Campgrounds
- Pine View Military - Fort Mccoy
- Sparta Walk-In Campground
- Leon Valley Campground
- Mcmullen Park Campground
- Mcmullen County Park
- Village Of Wilton Campground
Fishing spots
More reservoirs
Track Stillwell 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 Stillwell
Where does the data for Stillwell 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 Stillwell .