White Rock Dam Reservoir Report
Last Updated: December 13, 2025
White Rock Dam, also known as Mud Lake, is a federal-owned structure located on the Bois de Sioux River in Wahpeton, Minnesota.
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Summary
Completed in 1941 by the US Army Corps of Engineers, this earth dam stands at 33 feet high and stretches 14,500 feet in length, with a storage capacity of 95,500 acre-feet. Its primary purpose is flood risk reduction, although it also serves other functions such as fish and wildlife pond, recreation, and water supply.
With a hazard potential rated as high, White Rock Dam is closely monitored and maintained by the US Army Corps of Engineers to manage flood risks associated with the structure. Regular inspections, emergency action plans, and coordination with local emergency managers are key components of risk management measures. Despite the dam's capacity to store water and release it as needed, severe weather events can still pose challenges, requiring ongoing vigilance and readiness to respond to any potential emergencies.
Year Completed |
1941 |
Dam Length |
14500 |
Dam Height |
20 |
River Or Stream |
BOIS DE SIOUX |
Primary Dam Type |
Earth |
Surface Area |
3850 |
Hydraulic Height |
20 |
Drainage Area |
1160 |
Nid Storage |
95500 |
Structural Height |
33 |
Outlet Gates |
Tainter (radial) - 3 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
33 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
White Rock Dam
Mud Lake Above White Rock Dam Near White Rock