Mill Creek 13a
Mill Creek 13a is an earth dam located in Richland County, Wisconsin, built in 1962. It carries a Low hazard potential classification and has a fair condition assessment.
About Mill Creek 13a
The primary purpose of Mill Creek 13a 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 Richland County (local government). It impounds the East Branch Mill Creek.
The dam stands 24 feet tall and stretches 640 feet across, creates a reservoir covering 8 acres, has a maximum storage capacity of 175 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1962, 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 04/26/2016.
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Location
| State | Wisconsin |
| County | Richland |
| Nearest City | None |
| River/Stream | East Branch Mill Creek |
| Coordinates | 43.38228, -90.50309 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 640 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 175 acre-ft |
| Max Storage | 175 acre-ft |
| Normal Storage | 12 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 159 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Richland County |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 04/26/2016 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00386 |
| Federal ID | WI00386 |
| More Info | State Dam Safety Program |