Sodus 4 S is a dam located in Lyon County, Minnesota, built in 1991. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 33 ft33 ft tall and 1,000 ft long, taller than 76% of U.S. dams with a recorded height. 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 Sodus 4 S
The primary purpose of Sodus 4 S 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 County of Lyon (local government). It impounds the Meadow Creek-tr.
The dam stands 33 feet tall and stretches 1,000 feet across, has a maximum storage capacity of 480 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1991, the structure is 35 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 04/04/2019.
At 33 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | Minnesota |
| County | Lyon |
| Nearest City | None |
| River/Stream | Meadow Creek-tr |
| Coordinates | 44.35744, -95.78563 |
Physical Characteristics
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Dam Length | 1,000 ft |
| Year Completed | 1991 (35 years old) |
Storage & Hydraulics
| NID Storage | 480 acre-ft |
| Max Storage | 480 acre-ft |
| Drainage Area | 2 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | County of Lyon |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 04/04/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN01739 |
| Federal ID | MN01739 |
| More Info | State Dam Safety Program |