Nelligan Lake Reservoir Report
Nearby: Marsh Lake Grosse
Last Updated: December 8, 2025
Nelligan Lake in Marinette, Wisconsin is a picturesque spot known for its recreational opportunities.
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Summary
The earth dam, constructed in 1968 by the USDA NRCS, stands at 23 feet high and spans 200 feet in length. With a storage capacity of 740 acre-feet and a surface area of 32 acres, the lake offers a tranquil escape for water enthusiasts and nature lovers alike. The dam is regulated by the Wisconsin Department of Natural Resources and undergoes regular inspections to ensure public safety.
Despite its fair condition assessment, Nelligan Lake poses a high hazard potential due to its very high risk assessment rating. The controlled spillway and 200 max discharge rate help manage water levels, but the surrounding Murphy Creek could lead to potential flooding in extreme weather conditions. While the emergency action plan may need updating, the local government takes responsibility for the lake's management and enforcement. With its beautiful surroundings and recreational opportunities, Nelligan Lake remains a popular destination for residents and visitors seeking a peaceful retreat in nature.
Year Completed |
1968 |
Dam Length |
200 |
Dam Height |
23 |
River Or Stream |
MURPHY CREEK |
Primary Dam Type |
Earth |
Surface Area |
32 |
Hydraulic Height |
8 |
Drainage Area |
2.5 |
Nid Storage |
740 |
Structural Height |
23 |
Hazard Potential |
High |
Nid Height |
23 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Peshtigo River At Porterfield
|
498cfs |
Peshtigo River Near Wabeno
|
226cfs |
Peshtigo River At Peshtigo
|
513cfs |
Oconto River Near Gillett
|
596cfs |
Oconto River Near Oconto
|
319cfs |
Pike River At Amberg
|
186cfs |
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.
Nelligan Lake