Hamm Reservoir Report

Last Updated: December 5, 2025

Hamm is a private dam located in Juneau, Wisconsin, designed by USDA NRCS with a primary purpose of fire protection, stock, or small fish pond.


°F

°F

mph

Wind

%

Humidity

Summary

Completed in 1968, this earth dam stands at 8.5 feet tall with a hydraulic height of 4.1 feet and a length of 739 feet. With a normal storage capacity of 20 acre-feet and a maximum storage of 65 acre-feet, Hamm serves as a vital resource for water management in the area.

Despite being classified as a low hazard potential structure, Hamm is regulated by the Wisconsin Department of Natural Resources, with state permitting, inspection, and enforcement in place. The dam has a spillway width of 80 feet and is associated with TR Creek 33 11 TR Wisconsin. While its condition assessment is currently not rated, Hamm has an inspection frequency of 10 years, with the last inspection conducted in May 2012. The risk assessment for Hamm is moderate, emphasizing the importance of ongoing risk management measures to ensure the safety and sustainability of this water resource infrastructure.

For water resource and climate enthusiasts, Hamm presents an intriguing case study of a privately owned dam playing a crucial role in fire protection, agricultural water supply, and recreational activities in the region. As climate change continues to impact water availability and quality, understanding the maintenance and management of structures like Hamm is essential for ensuring resilience in the face of evolving environmental challenges. With a focus on sustainable water resource management, Hamm exemplifies the intersection of infrastructure, regulations, and environmental stewardship in safeguarding water security for future generations.

Year Completed

1968

Dam Length

739

Dam Height

8.5

River Or Stream

TR CREEK 33 11 TR WISCONSIN

Primary Dam Type

Earth

Surface Area

11

Hydraulic Height

4.1

Drainage Area

3.9

Nid Storage

65

Structural Height

8.5

Hazard Potential

Low

Nid Height

9
       
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.