Lake Yankton
Lake Yankton is a gravity dam located in Lyon County, Minnesota, built in 1942. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Lake Yankton
The primary purpose of Lake Yankton 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 City Of Balaton (local government). It impounds the Dog Creek-tr near Balaton.
The dam stands 8 feet tall and stretches 17 feet across, creates a reservoir covering 380 acres, has a maximum storage capacity of 380 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1942, the structure is well-established, with more than 75 years of service.
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 08/24/2023.
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Location
| State | Minnesota |
| County | Lyon |
| Nearest City | Balaton |
| River/Stream | Dog Creek-tr |
| Coordinates | 44.22920, -95.85633 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 17 ft |
| Year Completed | 1942 (84 years old) |
Storage & Hydraulics
| NID Storage | 380 acre-ft |
| Max Storage | 380 acre-ft |
| Normal Storage | 380 acre-ft |
| Surface Area | 380 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 389 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | City of Balaton |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/24/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00230 |
| Federal ID | MN00230 |
| More Info | State Dam Safety Program |