Jefferson
Jefferson is a gravity dam located in Jefferson County, Wisconsin, built in 1842. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Jefferson
The primary purpose of Jefferson is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City Of Jefferson (local government). It impounds the Rock near Jefferson.
The dam stands 11 feet tall and stretches 250 feet across, creates a reservoir covering 122 acres, has a maximum storage capacity of 650 acre-feet, and collects water from a drainage area of 1,074 square miles. Completed in 1842, the structure is one of the older dams in the region, with over a century and a half of service.
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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 10/25/2013. That was over 12 years ago.
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Location
| State | Wisconsin |
| County | Jefferson |
| Nearest City | Jefferson |
| River/Stream | Rock |
| Coordinates | 43.00328, -88.80984 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 250 ft |
| Year Completed | 1842 (184 years old) |
Storage & Hydraulics
| NID Storage | 650 acre-ft |
| Max Storage | 650 acre-ft |
| Normal Storage | 160 acre-ft |
| Surface Area | 122 acres |
| Drainage Area | 1,074 sq mi |
| Max Discharge | 6,536 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of Jefferson |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/25/2013 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00631 |
| Federal ID | WI00631 |
| More Info | State Dam Safety Program |