Dutch Hollow Lake Reservoir Report

Last Updated: December 13, 2025

Dutch Hollow Lake in Sauk, Wisconsin, is a private water resource managed by the Wisconsin Department of Natural Resources.


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Summary

This 750-foot long earth dam, completed in 1971, serves primarily for recreational purposes, offering a surface area of 125 acres and a maximum storage capacity of 5,500 acre-feet. The dam stands at a height of 60 feet, with a controlled spillway design to manage a maximum discharge of 110 cubic feet per second.

Despite its low hazard potential and fair condition assessment, Dutch Hollow Lake is subject to regular state inspections and enforcement measures to ensure its safety and compliance with regulations. The lake's risk assessment ranks very high, emphasizing the importance of proper risk management strategies. The surrounding Dutch Hollow Creek adds to the natural beauty and ecological significance of the area, making it a valuable asset for water resource and climate enthusiasts to appreciate and protect.

Year Completed

1971

Dam Length

750

Dam Height

60

River Or Stream

Dutch Hollow Creek

Primary Dam Type

Earth

Surface Area

125

Hydraulic Height

47

Drainage Area

5

Nid Storage

5500

Structural Height

60

Hazard Potential

Low

Nid Height

60
       
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.