Lake Beulah dam
Lake Beulah
Lake Beulah, located in Mukwonago, Wisconsin, is a picturesque reservoir primarily used for recreational purposes. This gravity dam, completed in 1840, stands at a height of 14 feet and spans 300 feet in length. With a storage capacity of 7,000 acre-feet and a drainage area of 10 square miles, Lake Beulah covers an area of 834 acres and has a maximum discharge of 193 cubic feet per second.
Despite being classified as a high hazard potential structure, Lake Beulah is currently in fair condition, last assessed in January 2018. The dam is regulated by the Wisconsin Department of Natural Resources (WIDNR) and undergoes regular inspections, with the last one conducted in July 2019. The reservoir's risk assessment is moderate, indicating a potential for issues but with management measures in place.
Enthusiasts of water resources and climate will appreciate Lake Beulah for its historical significance, scenic beauty, and recreational opportunities. With its controlled gravity dam and uncontrolled spillway, this reservoir serves as a vital resource for the community while requiring ongoing maintenance and monitoring to ensure its continued safety and functionality in the face of changing environmental conditions.
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 Lake Beulah -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Mukwonago River At Mukwonago | 44 cfs | → |
| Fox River At Waukesha | 89 cfs | → |
| Jackson Creek At Mound Road Near Elkhorn | 5 cfs | → |
| Bark River Near Rome | 100 cfs | → |
| Bark River At Nagawicka Road At Delafield | 42 cfs | → |
| White River At Center Street At Lake Geneva | 0 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lake Beulah.
Boat launches
- Mukwonago River - Lower Phantom Lake -- Access
- Beulah Lake -- Access At South End Of Lake
- Potters Lake -- Access Off County Hwy L
- Lower Phantom Lake -- Access
- Eagle Spring Lake (And Lulu Lake) -- Boat Landing
- Booth Lake - Boat Launch
Campgrounds
- Phantom Ranch Bible Camp
- Mukwonago County Park Campground
- Kmsf-Su Shelter 2
- Ottawa Lake Campground
- Pinewoods Campground
- Kmsf-Su Shelter 3
Fishing spots
More reservoirs
Track Lake Beulah 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 Lake Beulah
Where does the data for Lake Beulah 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 High 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 Lake Beulah.