Mondeaux Dam Reservoir Report
Nearby: Nelson High Hopes
Last Updated: December 6, 2025
Mondeaux Dam, located in Taylor County, Wisconsin, is a concrete gravity dam built in 1937 by the USDA Forest Service.
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Summary
With a primary purpose of serving as a fish and wildlife pond, the dam also offers recreational opportunities in the area. The dam spans 265 feet in length and stands at a height of 15 feet, holding a normal storage capacity of 1928 acre-feet and a maximum storage of 8000 acre-feet.
Situated on the Mondeaux River, the dam plays a crucial role in managing water resources and supporting the local ecosystem. With a significant hazard potential and moderate risk assessment, the dam's condition is currently not rated and has not been inspected since October 2018. Despite its age, Mondeaux Dam continues to serve as an important structure for water management and wildlife conservation in the region, showcasing the dedication of the Forest Service in maintaining and operating this vital infrastructure.
Water resource and climate enthusiasts will appreciate the historical significance and ecological impact of Mondeaux Dam, as it continues to provide essential support for fish and wildlife while offering recreational opportunities for visitors. With a rich history dating back to the 1930s, the dam stands as a testament to sustainable water management practices and the importance of preserving natural habitats. As efforts to assess and manage the dam's condition and risk continue, the Forest Service remains committed to ensuring the safety and functionality of this critical infrastructure for years to come.
Year Completed |
1937 |
Dam Length |
265 |
Dam Height |
13 |
River Or Stream |
MONDEAUX RIVER |
Primary Dam Type |
Concrete |
Surface Area |
400 |
Hydraulic Height |
13 |
Drainage Area |
33 |
Nid Storage |
8000 |
Structural Height |
15 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
15 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Spirit River At Spirit Falls
|
24cfs |
Jump River At Sheldon
|
155cfs |
Rib River At Rib Falls
|
60cfs |
Flambeau River Near Bruce
|
616cfs |
Wisconsin River At Merrill
|
1370cfs |
Prairie River Near Merrill
|
72cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
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. Investigations and studies are necessary.
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.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams 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, environment 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.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Eastwood Recreation Area Campground
Eastwood Campground
Spearhead Point Campground
West Point Recreation Area
West Point Campground
Picnic Point Campground
Mondeaux Dam
Mondeaux Flowage -- Access off Park Rd.
State Highway 49 Bridge Near Dillard, Missouri To Forest Boundary In Sections 13/24, T38N, R3W