Twin Parks 3
Twin Parks 3 is an earth dam located in Iowa County, Wisconsin, built in 1965. It carries a Low hazard potential classification and has a fair condition assessment.
About Twin Parks 3
The primary purpose of Twin Parks 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 Iowa County (local government). It impounds the Tributary To Mill Creek.
The dam stands 33 feet tall and stretches 346 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 244 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1965, 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 33 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | Wisconsin |
| County | Iowa |
| Nearest City | None |
| River/Stream | Tributary To Mill Creek |
| Coordinates | 43.01687, -90.01569 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Dam Length | 346 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 244 acre-ft |
| Max Storage | 244 acre-ft |
| Normal Storage | 26 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 115 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 | WI00358 |
| Federal ID | WI00358 |
| More Info | State Dam Safety Program |