Twp Road 30 East
Twp Road 30 East is an earth dam located in Lyon County, Minnesota, built in 1999. It carries a Low hazard potential classification.
About Twp Road 30 East
The primary purpose of Twp Road 30 East 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 23 feet tall and stretches 500 feet across, has a maximum storage capacity of 120 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. The most recent inspection on record was 07/31/2024.
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Location
| State | Minnesota |
| County | Lyon |
| Nearest City | Sanborn |
| River/Stream | Cottonwood River-tr |
| Coordinates | 44.29765, -95.65431 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 22 ft |
| Dam Length | 500 ft |
| Year Completed | 1999 (27 years old) |
Storage & Hydraulics
| NID Storage | 120 acre-ft |
| Max Storage | 120 acre-ft |
| Drainage Area | 1 sq mi |
| Max Discharge | 38 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | County of Lyon |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Last Inspection | 07/31/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN01045 |
| Federal ID | MN01045 |
| More Info | State Dam Safety Program |