Johnson is an earth dam located in Big Stone County, Minnesota, built in 1990. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 18 ft18 ft tall and 430 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 Johnson
The primary purpose of Johnson 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 USFWS (federal). It impounds the Minnesota River-tr near Big Stone Park.
The dam stands 18 feet tall and stretches 430 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 66 acre-feet, and collects water from a drainage area of 17 square miles. Completed in 1990, the structure is 36 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 07/17/2008. That was over 18 years ago.
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Location
| State | Minnesota |
| County | Big Stone |
| Nearest City | Big Stone Park |
| River/Stream | Minnesota River-tr |
| Coordinates | 45.39378, -96.51238 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 14 ft |
| Dam Length | 430 ft |
| Year Completed | 1990 (36 years old) |
Storage & Hydraulics
| NID Storage | 66 acre-ft |
| Max Storage | 66 acre-ft |
| Normal Storage | 24 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 17 sq mi |
| Max Discharge | 900 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | USFWS |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 07/17/2008 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00919 |
| Federal ID | MN00919 |
| More Info | State Dam Safety Program |