Polk
Polk is an earth dam located in Sauk County, Wisconsin, built in 1978. It carries a Low hazard potential classification and has a fair condition assessment.
About Polk
The primary purpose of Polk 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 Polk, Todd (private). It impounds the Tr-plum Creek.
The dam stands 24 feet tall and stretches 400 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 75 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1978, the structure is 48 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 04/26/2020.
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Location
| State | Wisconsin |
| County | Sauk |
| Nearest City | None |
| River/Stream | Tr-plum Creek |
| Coordinates | 43.60394, -90.29270 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 400 ft |
| Year Completed | 1978 (48 years old) |
Storage & Hydraulics
| NID Storage | 75 acre-ft |
| Max Storage | 75 acre-ft |
| Normal Storage | 14 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 40 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Polk, Todd |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 04/26/2020 |
| Emergency Action Plan | No |
Identifiers
| NID ID | WI00893 |
| Federal ID | WI00893 |
| More Info | State Dam Safety Program |