Glen Hills 2 Reservoir Report
Nearby: Glen Hills 1 Glen Hills 3
Last Updated: December 13, 2025
Located in St.
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Summary
Croix, Wisconsin, Glen Hills 2 is a flood risk reduction structure designed by the USDA NRCS and regulated by the Wisconsin Department of Natural Resources. Completed in 1970, this earth dam stands at 27 feet high with a hydraulic height of 15 feet, serving the primary purpose of flood risk reduction while also providing benefits for debris control and recreation. With a storage capacity of 200 acre-feet and a drainage area of 2 square miles, Glen Hills 2 has a low hazard potential and a moderate risk assessment rating.
The dam, situated on Powerline Creek, features an uncontrolled spillway and a length of 520 feet, encompassing a surface area of 6 acres. While last inspected in 2011 with a frequency of every 10 years, its condition remains unrated. Although not currently associated with any other structures, Glen Hills 2 plays a crucial role in mitigating flood risks in the region and ensuring the safety of nearby residents. As water resource and climate enthusiasts, it is essential to recognize the importance of such structures in safeguarding communities and preserving natural environments.
Years Modified |
1998 - Other |
Year Completed |
1970 |
Dam Length |
520 |
Dam Height |
27 |
River Or Stream |
Powerline Creek |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
15 |
Drainage Area |
2 |
Nid Storage |
200 |
Structural Height |
27 |
Hazard Potential |
Low |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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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