Lynd 30 is a rockfill dam located in Lyon County, Minnesota. It carries a Low hazard potential classification.
Dam profile
NID height · 18 ft18 ft tall and 490 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic rockfill embankment section and the water level is illustrative.
About Lynd 30
The primary purpose of Lynd 30 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 (private). It impounds the Threemile Creek-tr near Seaforth.
The dam stands 18 feet tall and stretches 490 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 53 acre-feet, and collects water from a drainage area of 1 square miles.
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. The most recent inspection on record was 07/31/2024.
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Location
| State | Minnesota |
| County | Lyon |
| Nearest City | Seaforth |
| River/Stream | Threemile Creek-tr |
| Coordinates | 44.39000, -95.94982 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 490 ft |
Storage & Hydraulics
| NID Storage | 53 acre-ft |
| Max Storage | 53 acre-ft |
| Normal Storage | 16 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 1 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | County of Lyon |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 07/31/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN01719 |
| Federal ID | MN01719 |
| More Info | State Dam Safety Program |