Twp Road 30 West
Twp Road 30 West 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 30 West
The primary purpose of Twp Road 30 West 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 Sanborn.
The dam stands 25 feet tall and stretches 250 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 212 acre-feet, and collects water from a drainage area of 1 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 05/02/2018.
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Location
| State | Minnesota |
| County | Lyon |
| Nearest City | Sanborn |
| River/Stream | Cottonwood River-tr |
| Coordinates | 44.29748, -95.66502 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 24 ft |
| Dam Length | 250 ft |
| Year Completed | 1999 (27 years old) |
Storage & Hydraulics
| NID Storage | 212 acre-ft |
| Max Storage | 212 acre-ft |
| Normal Storage | 8 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 41 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 | 05/02/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN01044 |
| Federal ID | MN01044 |
| More Info | State Dam Safety Program |