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.

High HazardFair ConditionEmergency Action Plan: Yes

Location

StateWisconsin
CountyJefferson
Nearest CityPalmyra
River/StreamScuppernong
Coordinates42.88094, -88.58179

Physical Characteristics

Dam TypeGravity
NID Height17 ft
Dam Height17 ft
Dam Length1,050 ft
Year Completed1844 (182 years old)

Storage & Hydraulics

NID Storage560 acre-ft
Max Storage560 acre-ft
Normal Storage451 acre-ft
Surface Area104 acres
Drainage Area29 sq mi
Max Discharge654 cfs
Spillway TypeControlled

Ownership & Safety

PurposeRecreation
OwnerVillage Of Palmyra
Owner TypeLocal Government
Hazard ClassificationHigh
Condition AssessmentFair
Last Inspection09/14/2021
Emergency Action PlanYes

Identifiers

NID IDWI00144
Federal IDWI00144
More InfoState Dam Safety Program

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