Little Willow River Wma is an earth dam located in Aitkin County, Minnesota, built in 1973. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 10 ft10 ft tall and 228 ft long. 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 Little Willow River Wma
The primary purpose of Little Willow River Wma 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-wildlife (state). It impounds the Little Willow River near Riverton.
The dam stands 10 feet tall and stretches 228 feet across, creates a reservoir covering 50 acres, has a maximum storage capacity of 950 acre-feet, and collects water from a drainage area of 22 square miles. Completed in 1973, 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 10/07/2016. That was over 10 years ago.
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Location
| State | Minnesota |
| County | Aitkin |
| Nearest City | Riverton |
| River/Stream | Little Willow River |
| Coordinates | 46.69932, -93.69713 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 228 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 950 acre-ft |
| Max Storage | 950 acre-ft |
| Normal Storage | 450 acre-ft |
| Surface Area | 50 acres |
| Drainage Area | 22 sq mi |
| Max Discharge | 100 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Mndnr-wildlife |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/07/2016 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00698 |
| Federal ID | MN00698 |
| More Info | State Dam Safety Program |