Amacoy dam
Amacoy
Amacoy is a flood risk reduction structure located in Rusk, Wisconsin, on the TR CHIPPEWA river. Built in 1967 by the USDA NRCS, this earth dam stands at a height of 20 feet and has a storage capacity of 5400 acre-feet. With a maximum discharge of 740 cubic feet per second, Amacoy serves the primary purpose of flood risk reduction while also providing recreational opportunities in the area.
Managed by the Wisconsin Department of Natural Resources, Amacoy is regulated, inspected, and enforced by state agencies to ensure its safety and functionality. Despite being classified as having a low hazard potential, the dam is considered to have moderate risk factors that are continuously monitored and managed. Although its condition assessment is currently not rated, the structure undergoes regular inspections every 10 years to maintain its integrity.
Located within the Detroit District of the US Army Corps of Engineers, Amacoy has not been modified since its completion and does not have associated structures or outlet gates. With its uncontrolled spillway type and moderate risk assessment, Amacoy stands as a vital water resource management tool in the region, embodying a balance between flood protection and recreational use.
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 Amacoy -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Chippewa River Near Bruce | 1,330 cfs | → |
| Flambeau River Near Bruce | 2,350 cfs | → |
| Jump River At Sheldon | 1,270 cfs | → |
| Red Cedar River Near Colfax | 897 cfs | → |
| Chippewa River At Bishops Bridge Near Winter | 598 cfs | → |
| Chippewa River At Chippewa Falls | 6,620 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Amacoy.
Boat launches
- Chippewa River -- Access At Fletcher Road Town Of Thornapple
- Round Lake -- Access At N Side Of Lake Off Round Lake Rd
- Flambeau River -- Access
- Chippewa River -- Access
- Boot Lake -- Access
- Chippewa River -- Access Nr Trails End St Town Of Atlanta
Campgrounds
- Bruce Village Park
- Audie Lake County Park
- Morris-Erickson Campground
- Murphy Flowage Park
- Southworth County Park
- Brunet Island State Park Campground
Track Amacoy 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 Amacoy
Where does the data for Amacoy 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 Amacoy.