Monroe 3
Monroe 3 is an earth dam located in Lyon County, Minnesota, built in 2007. It carries a Low hazard potential classification and has a fair condition assessment.
About Monroe 3
The primary purpose of Monroe 3 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 Highway Department (local government). It impounds the Cottonwood River-tr near Lamberton.
The dam stands 37 feet tall and stretches 700 feet across, has a maximum storage capacity of 100 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 2007, the structure is relatively new.
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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 05/02/2018.
At 37 feet, this dam is taller than 84% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Minnesota |
| County | Lyon |
| Nearest City | Lamberton |
| River/Stream | Cottonwood River-tr |
| Coordinates | 44.26872, -95.63820 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 37 ft |
| Dam Height | 27 ft |
| Dam Length | 700 ft |
| Year Completed | 2007 (19 years old) |
Storage & Hydraulics
| NID Storage | 100 acre-ft |
| Max Storage | 100 acre-ft |
| Normal Storage | 1 acre-ft |
| Drainage Area | 6 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | County of Lyon Highway Department |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/02/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN01428 |
| Federal ID | MN01428 |
| More Info | State Dam Safety Program |