Hartman Creek Number Five Reservoir Report

Last Updated: December 6, 2025

Hartman Creek Number Five is a gravity dam located in Waupaca, Wisconsin, along the Hartman Creek river.


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Summary

Built in 1931 for recreational purposes, this dam stands at a height of 13.9 feet and has a storage capacity of 150 acre-feet. With a controlled spillway and a maximum discharge of 665 cubic feet per second, this dam serves as a vital resource for water management in the area.

Despite being classified as having a low hazard potential, Hartman Creek Number Five is considered to have a very high risk level, with a risk assessment rating of 1. While the dam has not been rated for its current condition, it was last inspected in October 2011 and is subject to regular inspections every 10 years. The emergency action plan for this dam was last revised in January 2015, indicating a commitment to ensuring the safety and integrity of this structure for the surrounding community.

With its picturesque location and vital role in water resource management, Hartman Creek Number Five is a significant landmark in the region. As a state-regulated dam under the jurisdiction of the Wisconsin Department of Natural Resources, it continues to provide valuable recreational opportunities while also being closely monitored to mitigate any potential risks associated with its operation.

Years Modified

1940 - Other

Year Completed

1931

Dam Length

100

Dam Height

13.9

River Or Stream

HARTMAN CREEK

Primary Dam Type

Gravity

Surface Area

19

Hydraulic Height

10

Drainage Area

2

Nid Storage

150

Structural Height

13.9

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.