Glenbeulah Reservoir Report

Last Updated: December 5, 2025

Glenbeulah, located in Sheboygan, Wisconsin, is home to a gravity dam on the Mullet River that was completed in 1860 for recreational purposes.


°F

°F

mph

Wind

%

Humidity

Summary

The dam stands at a height of 14 feet and has a hydraulic height of 12 feet, with a length of 450 feet. It has a storage capacity of 60 acre-feet and a surface area of 7 acres, serving as a popular spot for outdoor activities and water recreation.

Despite being classified with a low hazard potential, the dam's condition was assessed as fair as of May 2020. The risk assessment for Glenbeulah's dam is very high (1), indicating the need for ongoing monitoring and maintenance to ensure its continued safety and effectiveness. The dam is regulated by the Wisconsin Department of Natural Resources, with state permitting, inspection, and enforcement in place to oversee its operation and compliance with safety standards.

With Glenn Grothman representing the area in Congress, Glenbeulah's dam remains a vital infrastructure for the community's recreational enjoyment. As water resource and climate enthusiasts, staying informed about the dam's condition and risk management measures is crucial to preserving this historic structure and ensuring the safety of all who visit the Mullet River area.

Year Completed

1860

Dam Length

450

Dam Height

14

River Or Stream

MULLET

Primary Dam Type

Gravity

Surface Area

7

Hydraulic Height

12

Drainage Area

46

Nid Storage

60

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.