Twp Road 29
Twp Road 29 is an earth dam located in Lyon County, Minnesota, built in 1999. It carries a Low hazard potential classification and has a poor condition assessment.
About Twp Road 29
The primary purpose of Twp Road 29 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 Cottonwood River-tr near Russell.
The dam stands 22 feet tall and stretches 500 feet across, has a maximum storage capacity of 3,235 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1999, the structure is 27 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 05/01/2018.
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Location
| State | Minnesota |
| County | Lyon |
| Nearest City | Russell |
| River/Stream | Cottonwood River-tr |
| Coordinates | 44.29832, -96.02390 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 19 ft |
| Dam Length | 500 ft |
| Year Completed | 1999 (27 years old) |
Storage & Hydraulics
| NID Storage | 3,235 acre-ft |
| Max Storage | 3,235 acre-ft |
| Drainage Area | 4 sq mi |
| Max Discharge | 573 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | County of Lyon |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 05/01/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN01046 |
| Federal ID | MN01046 |
| More Info | State Dam Safety Program |