Schwahn dam
Schwahn
Located in Adams, Wisconsin, Schwahn is a privately owned dam on Duck Creek with a primary purpose of recreation. Built in 1979, this gravity dam stands at 14 feet tall and spans 1190 feet in length, providing a storage capacity of 120 acre-feet. The dam poses a low hazard potential but has a very high risk assessment rating, emphasizing the need for careful monitoring and management.
Despite being privately owned, Schwahn is subject to state regulation, permitting, inspection, and enforcement by the Wisconsin Department of Natural Resources. The dam is state-jurisdictional, ensuring that it meets safety standards and operational requirements. With a controlled spillway and a drainage area of 17 square miles, Schwahn plays a crucial role in managing water resources and protecting the surrounding environment.
As climate change continues to impact water resources and infrastructure, dams like Schwahn must adapt to evolving conditions to ensure the safety of nearby communities and ecosystems. With its strategic location and recreational significance, Schwahn serves as a vital piece of the water management puzzle in Wisconsin, highlighting the interconnected relationship between water resources, climate resilience, and regulatory oversight.
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 Schwahn -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Yellow River At Necedah | 253 cfs | → |
| Lemonweir River At New Lisbon | 326 cfs | → |
| Wisconsin River Near Wisconsin Dells | 9,040 cfs | → |
| Tenmile Creek Near Nekoosa | 130 cfs | → |
| Yellow River At Babcock | 57 cfs | → |
| Baraboo River Near Baraboo | 385 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Schwahn.
Boat launches
- Castle Rock Lake --Castle Rock Park (Adams Co.)
- Klein Creek/Castle Rock Flowage -- Access
- Wisconsin River -- Access At Town Of Quincy Nr 19th Dr
- Castle Rock Lake -- County Park Access (Juneau Co)
- Little Roche A Cri Creek -- Access
- Easton Lake -- Easton Pond Access
Campgrounds
- Castle Rock County Park
- Adams County Castle Rock
- Castle Rock Park Campground
- Winnebago
- Comanchee
- Buckhorn State Park
Paddle runs
- Honey Creek (County Road Y On The Southern Bank) To The State Route 130 Highway Bridge Crossing At Lone Rock
- Lone Rock To The Confluence Of The Green And Wisconsin Rivers
More reservoirs
Track Schwahn 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 Schwahn
Where does the data for Schwahn 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 Schwahn.