Harrison Reservoir Report

Last Updated: December 6, 2025

Located in Lincoln, Wisconsin, the Harrison dam stands as a vital water resource managed by the local government.


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Summary

Built in 1939, this gravity dam on the North Branch Pine Creek serves primarily for recreational purposes, offering a surface area of 206 acres and a drainage area of 3.6 square miles. With a maximum storage capacity of 1200 acre-feet and a normal storage of 550 acre-feet, the dam plays a crucial role in water management in the region.

Despite being classified as a low hazard potential structure with fair condition assessment, the Harrison dam faces a very high risk due to its age and the increased demands placed on it over the years. The dam has undergone modifications in 2015, and regular inspections are conducted to ensure its integrity and safety. The dam features a controlled spillway and has a hydraulic height of 8 feet, structural height of 12 feet, and a length of 340 feet, making it a significant part of the local water infrastructure.

With Sean P. Duffy as the representing congressman for the area, the Harrison dam continues to be a key feature in the water resource management of the region. As climate change impacts water resources, the importance of maintaining and upgrading such infrastructure becomes even more critical to ensure the safety and sustainability of the surrounding communities. The Harrison dam serves as a reminder of the interconnectedness between water resources, climate change, and community well-being.

Years Modified

2015 - Other

Year Completed

1939

Dam Length

340

Dam Height

12

River Or Stream

NORTH BRANCH PINE CREEK

Primary Dam Type

Gravity

Surface Area

206

Hydraulic Height

8

Drainage Area

3.6

Nid Storage

1200

Structural Height

12

Hazard Potential

Low

Nid Height

12
       
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.
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Area Campgrounds