Csah 5 Detention is an earth dam located in Lyon County, Minnesota, built in 1996. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 40 ft40 ft tall and 900 ft long, taller than 86% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Csah 5 Detention
The primary purpose of Csah 5 Detention 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 Meadow Creek near Milroy.
The dam stands 40 feet tall and stretches 900 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 434 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1996, the structure is 30 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 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 05/01/2018.
At 40 feet, this dam is taller than 86% of dams nationwide.
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Location
| State | Minnesota |
| County | Lyon |
| Nearest City | Milroy |
| River/Stream | Meadow Creek |
| Coordinates | 44.36551, -95.87691 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 37 ft |
| Dam Length | 900 ft |
| Year Completed | 1996 (30 years old) |
Storage & Hydraulics
| NID Storage | 434 acre-ft |
| Max Storage | 434 acre-ft |
| Normal Storage | 2 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 169 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | County of Lyon |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/01/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN01374 |
| Federal ID | MN01374 |
| More Info | State Dam Safety Program |