Peppermill Reservoir Report
Nearby: Oxford Mcginnis Lake
Last Updated: December 5, 2025
Peppermill, located in Adams County, Wisconsin, is a stunning recreational dam built in 1969 by the USDA NRCS.
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Summary
The dam stands at a height of 12 feet, with a hydraulic height of 9 feet, and a length of 275 feet, creating a reservoir with a normal storage capacity of 200 acre-feet. Situated on Peppermill Creek, the dam serves multiple purposes, with its primary function being recreation, offering visitors a serene environment for various outdoor activities.
With a low hazard potential and a satisfactory condition assessment, Peppermill dam poses minimal risks to its surrounding area. The dam is regulated by the Wisconsin Department of Natural Resources (WIDNR), ensuring that it meets state permitting, inspection, and enforcement requirements. Despite its low hazard potential, the risk assessment for Peppermill identifies a very high risk level, indicating the importance of ongoing monitoring and management measures to mitigate potential hazards and ensure the safety of the dam and its downstream areas.
Peppermill's location in a picturesque setting, along with its impressive design and recreational opportunities, makes it a key water resource for the community. Managed by local government authorities and with a history of satisfactory condition assessments, Peppermill serves as an essential infrastructure for both water management and outdoor recreation in the region, highlighting the importance of sustainable water resource management practices in the face of changing climatic conditions.
Year Completed |
1969 |
Dam Length |
275 |
Dam Height |
12 |
River Or Stream |
PEPPERMILL CREEK |
Primary Dam Type |
Earth |
Surface Area |
80 |
Hydraulic Height |
9 |
Drainage Area |
1 |
Nid Storage |
500 |
Structural Height |
12 |
Hazard Potential |
Low |
Nid Height |
12 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wisconsin River Near Wisconsin Dells
|
3240cfs |
Baraboo River Near Baraboo
|
310cfs |
Fox River At Princeton
|
686cfs |
Lemonweir River At New Lisbon
|
261cfs |
Yellow River At Necedah
|
55cfs |
Tenmile Creek Near Nekoosa
|
25cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Shiloh
|
||
Gettysburg
|
||
Concord And Lexington
|
Peppermill
Peppermill Lake -- Access