Coon Creek 16 Reservoir Report

Last Updated: December 5, 2025

Coon Creek 16, also known as Garlick, is a local government-owned earth dam located along the TR Timber Coulee in Vernon, Wisconsin.


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Summary

Built in 1962 by USDA NRCS, this structure serves primarily for flood risk reduction and debris control purposes. With a dam height of 29 feet and a hydraulic height of 15 feet, Coon Creek 16 has a storage capacity of 38 acre-feet and a drainage area of 1 square mile. Despite being classified as having a low hazard potential, the dam is regularly inspected by WIDNR to ensure its fair condition and safety.

This dam, managed by the Natural Resources Conservation Service, plays a crucial role in reducing the risk of flooding and safeguarding the surrounding area. With its uncontrolled spillway type and a maximum discharge capacity of 33 cubic feet per second, Coon Creek 16 has been designed to withstand moderate risk factors. Although it has not undergone any significant modifications in recent years, the structure's maintenance and inspection protocols are regularly updated to meet regulatory standards and ensure its operational effectiveness.

Coon Creek 16 stands as a vital infrastructure asset in the region, providing essential flood risk management and protection to the local community. Its strategic location and design elements contribute to its overall effectiveness in mitigating potential hazards and maintaining a safe environment. As water resource and climate enthusiasts, understanding the significance of Coon Creek 16 in the context of watershed management and environmental conservation is essential for appreciating the interconnectedness of water infrastructure and climate resilience efforts.

Year Completed

1962

Dam Length

237

Dam Height

29

River Or Stream

TR TIMBER COULEE

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

15

Drainage Area

1

Nid Storage

38

Structural Height

29

Hazard Potential

Low

Nid Height

29
       
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.