Hartley Lake
Hartley Lake is a gravity dam located in Itasca County, Minnesota, built in 1938. It carries a Low hazard potential classification and has a fair condition assessment.
About Hartley Lake
The primary purpose of Hartley Lake is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Mndnr-fisheries (state). It impounds the Prairie River, West Fork near La Prairie.
The dam stands 12 feet tall and stretches 43 feet across, creates a reservoir covering 318 acres, has a maximum storage capacity of 1,925 acre-feet, and collects water from a drainage area of 35 square miles. Completed in 1938, 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 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 08/01/2017.
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Location
| State | Minnesota |
| County | Itasca |
| Nearest City | La Prairie |
| River/Stream | Prairie River, West Fork |
| Coordinates | 47.55825, -93.29805 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 12 ft |
| Dam Height | 8 ft |
| Dam Length | 43 ft |
| Year Completed | 1938 (88 years old) |
Storage & Hydraulics
| NID Storage | 1,925 acre-ft |
| Max Storage | 1,925 acre-ft |
| Normal Storage | 1,100 acre-ft |
| Surface Area | 318 acres |
| Drainage Area | 35 sq mi |
| Max Discharge | 1,200 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | MNDNR-Fisheries |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 08/01/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00657 |
| Federal ID | MN00657 |
| More Info | State Dam Safety Program |