Johnson Pool
Johnson Pool is a rockfill dam located in Freeborn County, Minnesota, built in 1970. It carries a Low hazard potential classification and has a fair condition assessment.
About Johnson Pool
The primary purpose of Johnson Pool 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 Johnson, Duane (private). It impounds the Turtle Creek-tr near Moscow.
The dam stands 20 feet tall and stretches 500 feet across, creates a reservoir covering 77 acres, has a maximum storage capacity of 1,454 acre-feet, and collects water from a drainage area of 1 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 04/03/2013. That was over 13 years ago.
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Location
| State | Minnesota |
| County | Freeborn |
| Nearest City | Moscow |
| River/Stream | Turtle Creek-tr |
| Coordinates | 43.73373, -93.11793 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 20 ft |
| Dam Height | 17 ft |
| Dam Length | 500 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 1,454 acre-ft |
| Max Storage | 1,454 acre-ft |
| Normal Storage | 1,052 acre-ft |
| Surface Area | 77 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 25 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Johnson, Duane |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 04/03/2013 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00387 |
| Federal ID | MN00387 |
| More Info | State Dam Safety Program |