Otter Creek 12
Otter Creek 12 is an earth dam located in Iowa County, Wisconsin, built in 1972. It carries a Low hazard potential classification and has a fair condition assessment.
About Otter Creek 12
The primary purpose of Otter Creek 12 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 Iowa County (local government). It impounds the Flint Creek.
The dam stands 58 feet tall and stretches 750 feet across, has a maximum storage capacity of 5,000 acre-feet, and collects water from a drainage area of 13 square miles. Completed in 1972, 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. The most recent inspection on record was 05/18/2022.
At 58 feet, this dam is taller than 95% of all dams in the United States.
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Location
| State | Wisconsin |
| County | Iowa |
| Nearest City | None |
| River/Stream | Flint Creek |
| Coordinates | 43.03246, -90.20920 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 58 ft |
| Dam Height | 58 ft |
| Dam Length | 750 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 5,000 acre-ft |
| Max Storage | 5,000 acre-ft |
| Drainage Area | 13 sq mi |
| Max Discharge | 340 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Iowa County |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/18/2022 |
| Emergency Action Plan | No |
Identifiers
| NID ID | WI00514 |
| Federal ID | WI00514 |
| More Info | State Dam Safety Program |