Tri Creek Number One Reservoir Report

Last Updated: December 13, 2025

Located in Monroe, Wisconsin, Tri Creek Number One is a crucial flood risk reduction structure designed by the USDA NRCS in 1976.


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Summary

This earth dam stands at a height of 57 feet and has a hydraulic height of 23 feet, with a total length of 1265 feet. The dam has a storage capacity of 2400 acre-feet and serves the primary purpose of flood risk reduction, with additional benefits for recreation.

Managed by the Wisconsin Department of Natural Resources, Tri Creek Number One is subject to regular state inspections and enforcement to ensure its structural integrity and functionality. The dam's spillway, which is uncontrolled, has a width of 153 feet and a maximum discharge capacity of 18225 cubic feet per second. With a hazard potential rated as high and a satisfactory condition assessment, the structure plays a critical role in managing water resources in the area.

In the event of an emergency, Tri Creek Number One is equipped with an emergency action plan to guide response efforts. With a moderate risk assessment and a history of meeting regulatory guidelines, this dam demonstrates a commitment to effective risk management and the protection of local communities and ecosystems along TR Morris Creek.

Year Completed

1976

Dam Length

1265

Dam Height

57

River Or Stream

TR MORRIS CREEK

Primary Dam Type

Earth

Surface Area

23

Hydraulic Height

23

Drainage Area

4.6

Nid Storage

2400

Structural Height

57

Hazard Potential

High

Nid Height

57
       
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.