Danville Reservoir Report

Last Updated: December 5, 2025

Located in Danville, Wisconsin, the Danville Dam stands as a testament to the area's rich history, with its construction dating back to 1850.


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Summary

This gravity dam, primarily used for recreation and hydroelectric purposes, spans 200 feet in length and reaches a height of 17 feet. The dam holds a storage capacity of 190 acre-feet, serving a drainage area of 190 acres and boasting a maximum discharge of 2600 cubic feet per second.

Despite its age, the Danville Dam maintains a fair condition assessment, with a low hazard potential and a moderate risk rating. The uncontrolled spillway, 101 feet wide, enhances the dam's safety features, ensuring the protection of the surrounding community. Regular inspections, conducted every 10 years, reinforce the dam's structural integrity, with the last assessment taking place in May 2020. With its scenic location along the Crawfish River, the Danville Dam continues to be a vital resource for water management and recreation in Dodge County, Wisconsin.

Years Modified

1927 - Other

Year Completed

1850

Dam Length

200

Dam Height

17

River Or Stream

CRAWFISH R

Primary Dam Type

Gravity

Surface Area

37

Hydraulic Height

10

Drainage Area

190

Nid Storage

190

Structural Height

17

Hazard Potential

Low

Nid Height

17
       
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.