Stoughton Reservoir Report

Last Updated: December 6, 2025

Located in Dane County, Wisconsin, the Stoughton hydroelectric plant stands along the Yahara River, serving as a vital water resource and climate asset in the region.


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Summary

Built in 1916, this earth dam structure boasts a height of 11 feet and a length of 520 feet, with a capacity to store 500 acre-feet of water for hydroelectric power generation and recreational activities. The dam's controlled spillway and low hazard potential contribute to its satisfactory condition assessment, ensuring the safety and functionality of the facility.

Managed by the local government and regulated by the Wisconsin Department of Natural Resources, the Stoughton dam undergoes regular inspections to uphold its structural integrity and operational efficiency. With a drainage area of 429 square miles and a maximum discharge capacity of 2520 cubic feet per second, this dam plays a crucial role in managing water flow and mitigating flood risks in the area. Additionally, its very high risk assessment rating signifies the importance of implementing proper risk management measures to safeguard the surrounding communities and environment.

As a key player in the conservation and utilization of water resources, the Stoughton hydroelectric plant continues to uphold its role in sustainable energy production and recreational opportunities for the residents of Stoughton and beyond. With a history of modifications and ongoing maintenance efforts, this dam remains a cornerstone in water management efforts, showcasing the intersection of innovation, environmental stewardship, and community engagement in the realm of water resource management and climate resilience.

Years Modified

2009 - Other

Year Completed

1916

Dam Length

520

Dam Height

11

River Or Stream

YAHARA RIVER

Primary Dam Type

Earth

Surface Area

82

Hydraulic Height

9

Drainage Area

429

Nid Storage

500

Structural Height

11

Hazard Potential

Low

Nid Height

11
       
Seasonal Comparison

Weather Forecast

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. 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

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, 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.