Spruce Lake Reservoir Report
Nearby: Hancock Lake Rhinelander
Last Updated: December 7, 2025
Spruce Lake, located in Oneida, Wisconsin, is a picturesque water resource known for its tranquil surroundings and diverse wildlife.
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Summary
Originally completed in 1967, this earth dam structure serves multiple purposes, including providing a habitat for fish and wildlife as well as supporting recreational activities. With a dam height of 11.4 feet and a storage capacity of 110 acre-feet, Spruce Lake covers a surface area of 30 acres and has a drainage area of 2 square miles.
Managed by the Wisconsin Department of Natural Resources, Spruce Lake is regulated and inspected regularly to ensure its safety and functionality. Despite being classified as having a low hazard potential, the dam is continuously monitored for any signs of deterioration. The condition assessment in 2014 rated it as fair, with a very high risk assessment of 1. While the lake offers a peaceful retreat for nature enthusiasts and climate advocates, its maintenance and risk management measures remain a top priority to ensure its long-term sustainability.
In the heart of the St. Paul District and under the jurisdiction of the state of Wisconsin, Spruce Lake stands as a testament to the importance of water resource management and climate resilience. With its controlled spillway and stable earth dam structure, this wildlife pond serves as a vital ecosystem for local flora and fauna. As climate change continues to impact water resources, the conservation efforts and regulatory oversight at Spruce Lake play a crucial role in preserving this natural gem for future generations to enjoy.
Year Completed |
1967 |
Dam Length |
300 |
Dam Height |
11.4 |
Primary Dam Type |
Earth |
Surface Area |
30 |
Hydraulic Height |
6.6 |
Drainage Area |
2 |
Nid Storage |
110 |
Structural Height |
11.4 |
Hazard Potential |
Low |
Nid Height |
11 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
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