Glen Hills 7 Reservoir Report

Last Updated: December 6, 2025

Glen Hills 7 is a crucial structure designed by USDA NRCS and located in St.


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Summary

Croix, Wisconsin. This dam, completed in 1973, serves the primary purpose of flood risk reduction in the area. With a height of 34 feet and a hydraulic height of 29.5 feet, Glen Hills 7 plays a significant role in managing water levels and protecting the surrounding community from potential hazards.

The dam has a high hazard potential and is regulated by the Wisconsin Department of Natural Resources. It has a satisfactory condition assessment as of February 2019 and is inspected at a frequency of 2 times per year. With a drainage area of 2.88 square miles and a maximum discharge capacity of 904 cubic feet per second, Glen Hills 7 is a critical infrastructure for mitigating flood risks and ensuring the safety of the residents in the area.

Despite its age, Glen Hills 7 continues to fulfill its purpose effectively, with a moderate risk assessment rating of 3. The dam has a storage capacity of 490 acre-feet and serves as an essential component in the overall water resource management strategy for the region. As climate change continues to impact water resources, structures like Glen Hills 7 play a vital role in safeguarding communities against the threats of flooding and ensuring sustainable water management practices for the future.

Years Modified

2002 - Other

Year Completed

1973

Dam Length

920

Dam Height

34

River Or Stream

Tributary to Sandy Creek

Primary Dam Type

Earth

Hydraulic Height

29.5

Drainage Area

2.88

Nid Storage

490

Structural Height

34

Hazard Potential

High

Foundations

Rock, Soil

Nid Height

34
       
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.