Twin Parks 6
Twin Parks 6 is an earth dam located in Iowa County, Wisconsin, built in 1968. It carries a Low hazard potential classification and has a fair condition assessment.
About Twin Parks 6
The primary purpose of Twin Parks 6 is debris control. The dam is designed to catch sediment, rocks, and debris carried by flowing water — particularly important in areas prone to mudslides or heavy erosion. The dam is owned by Iowa County (local government). It impounds the U/n Tributary To Mill Cr..
The dam stands 26 feet tall and stretches 868 feet across, has a maximum storage capacity of 585 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1968, 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.
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Location
| State | Wisconsin |
| County | Iowa |
| Nearest City | None |
| River/Stream | U/n Tributary To Mill Cr. |
| Coordinates | 43.04164, -90.00150 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 868 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 585 acre-ft |
| Max Storage | 585 acre-ft |
| Drainage Area | 4 sq mi |
| Max Discharge | 170 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Debris Control |
| 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 | WI00360 |
| Federal ID | WI00360 |
| More Info | State Dam Safety Program |