Lake Geneva Reservoir Report

Nearby: Grethe Brown

Last Updated: December 5, 2025

Lake Geneva, also known as Geneva Lake, is a stunning body of water located in Walworth County, Wisconsin.


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Summary

This private lake serves as a popular recreational destination, offering activities such as boating, fishing, and swimming in its 5,262-acre surface area. The dam at Lake Geneva, completed in 1836, stands at a height of 14 feet and has a maximum storage capacity of 40,000 acre-feet.

Managed by the Wisconsin Department of Natural Resources, Lake Geneva's dam has a controlled spillway type and a low hazard potential, with a satisfactory condition assessment as of October 2019. Despite its low hazard potential, the risk assessment for the dam is marked as very high, with a risk level of 1. The lake is fed by the White River and has a drainage area of 36 square miles, with a maximum discharge capacity of 650 cubic feet per second.

Visitors to Lake Geneva can enjoy its picturesque surroundings and abundant recreational opportunities, making it a must-visit destination for water resource and climate enthusiasts looking to explore the natural beauty of Wisconsin.

Years Modified

1912 - Other

Year Completed

1836

Dam Length

300

Dam Height

14

River Or Stream

WHITE RIVER

Primary Dam Type

Gravity

Surface Area

5262

Hydraulic Height

8

Drainage Area

36

Nid Storage

40000

Structural Height

14

Hazard Potential

Low

Nid Height

14
       
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.