Glen Hills 3 is an earth dam located in St. Croix County, Wisconsin, built in 1970. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 30 ft30 ft tall and 860 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 3
The primary purpose of Glen Hills 3 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 Blue Creek.
The dam stands 30 feet tall and stretches 860 feet across, creates a reservoir covering 11 acres, has a maximum storage capacity of 274 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1970, 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. 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 | Blue Creek |
| Coordinates | 45.05153, -92.20691 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 860 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 274 acre-ft |
| Max Storage | 274 acre-ft |
| Normal Storage | 30 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 727 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 | No |
Identifiers
| NID ID | WI00396 |
| Federal ID | WI00396 |
| More Info | State Dam Safety Program |