Hill River Lake
Hill River Lake is a gravity dam located in Polk County, Minnesota, built in 1950. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Hill River Lake
The primary purpose of Hill River Lake 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 Mndnr-fisheries (state). It impounds the Hill River near Brooks.
The dam stands 8 feet tall and stretches 42 feet across, creates a reservoir covering 88 acres, has a maximum storage capacity of 940 acre-feet, and collects water from a drainage area of 99 square miles. Completed in 1950, the structure is well-established, with more than 75 years of service.
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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 06/09/2015. That was over 10 years ago.
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Location
| State | Minnesota |
| County | Polk |
| Nearest City | Brooks |
| River/Stream | Hill River |
| Coordinates | 47.67378, -95.81676 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 8 ft |
| Dam Height | 6 ft |
| Dam Length | 42 ft |
| Year Completed | 1950 (76 years old) |
Storage & Hydraulics
| NID Storage | 940 acre-ft |
| Max Storage | 940 acre-ft |
| Normal Storage | 780 acre-ft |
| Surface Area | 88 acres |
| Drainage Area | 99 sq mi |
| Max Discharge | 760 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | MNDNR-Fisheries |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/09/2015 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00226 |
| Federal ID | MN00226 |
| More Info | State Dam Safety Program |