Island Lake 13 is a dam located in Lyon County, Minnesota, built in 1994. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 31 ft31 ft tall and 1,940 ft long, taller than 72% 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 Island Lake 13
The primary purpose of Island Lake 13 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 Threemile Creek.
The dam stands 31 feet tall and stretches 1,940 feet across, has a maximum storage capacity of 920 acre-feet, and collects water from a drainage area of 27 square miles. Completed in 1994, the structure is 32 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 09/09/2022.
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Location
| State | Minnesota |
| County | Lyon |
| Nearest City | None |
| River/Stream | Threemile Creek |
| Coordinates | 44.41809, -95.97532 |
Physical Characteristics
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 1,940 ft |
| Year Completed | 1994 (32 years old) |
Storage & Hydraulics
| NID Storage | 920 acre-ft |
| Max Storage | 920 acre-ft |
| Drainage Area | 27 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | County of Lyon |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/09/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN01730 |
| Federal ID | MN01730 |
| More Info | State Dam Safety Program |