Spring Lake
Spring Lake is a gravity dam located in Jefferson County, Wisconsin, built in 1844. It carries a High hazard potential classification and has a fair condition assessment.
About Spring Lake
The primary purpose of Spring Lake is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Village Of Palmyra (local government). It impounds the Scuppernong near Palmyra.
The dam stands 17 feet tall and stretches 1,050 feet across, creates a reservoir covering 104 acres, has a maximum storage capacity of 560 acre-feet, and collects water from a drainage area of 29 square miles. Completed in 1844, the structure is one of the older dams in the region, with over a century and a half of service.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 09/14/2021.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Wisconsin dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Wisconsin |
| County | Jefferson |
| Nearest City | Palmyra |
| River/Stream | Scuppernong |
| Coordinates | 42.88094, -88.58179 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 1,050 ft |
| Year Completed | 1844 (182 years old) |
Storage & Hydraulics
| NID Storage | 560 acre-ft |
| Max Storage | 560 acre-ft |
| Normal Storage | 451 acre-ft |
| Surface Area | 104 acres |
| Drainage Area | 29 sq mi |
| Max Discharge | 654 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Village Of Palmyra |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 09/14/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00144 |
| Federal ID | WI00144 |
| More Info | State Dam Safety Program |