Coon Creek 21
Coon Creek 21 is an earth dam located in Monroe County, Wisconsin, built in 1963. It carries a Low hazard potential classification and has a unsatisfactory condition assessment.
About Coon Creek 21
The primary purpose of Coon Creek 21 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 Monroe County (local government). It impounds the Un Trib Rullands Coulee Creek.
The dam stands 46 feet tall and stretches 315 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 271 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1963, the structure is well into its service life at over 50 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 unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. The most recent inspection on record was 08/18/2016.
At 46 feet, this dam is taller than 91% of dams nationwide.
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Location
| State | Wisconsin |
| County | Monroe |
| Nearest City | None |
| River/Stream | Un Trib Rullands Coulee Creek |
| Coordinates | 43.73140, -90.84189 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 46 ft |
| Dam Height | 46 ft |
| Dam Length | 315 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 271 acre-ft |
| Max Storage | 271 acre-ft |
| Normal Storage | 4 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 663 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Monroe County |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 08/18/2016 |
| Emergency Action Plan | No |
Identifiers
| NID ID | WI00373 |
| Federal ID | WI00373 |
| More Info | State Dam Safety Program |