Glen Hills 1 is an earth dam located in St. Croix County, Wisconsin, built in 1966. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 30 ft30 ft tall and 660 ft long, taller than 68% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Glen Hills 1
The primary purpose of Glen Hills 1 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by St. Croix County (local government). It impounds the Tributary to Power Line Creek.
The dam stands 30 feet tall and stretches 660 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 115 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1966, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 05/02/2012. That was over 14 years ago.
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Location
| State | Wisconsin |
| County | St. Croix |
| Nearest City | None |
| River/Stream | Tributary to Power Line Creek |
| Coordinates | 45.02834, -92.20305 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 660 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 115 acre-ft |
| Max Storage | 115 acre-ft |
| Normal Storage | 32 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 73 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | St. Croix County |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/02/2012 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00394 |
| Federal ID | WI00394 |
| More Info | State Dam Safety Program |