Walnut Point State Park Lake Dam Reservoir Report
Nearby: Oakland Lake Dam Miller Lake Dam
Last Updated: December 20, 2025
Walnut Point State Park Lake Dam, located in Douglas County, Illinois, is a crucial structure designed by Chastain Engineering Service and completed in 1967.
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Summary
This earth dam boasts a height of 46 feet, a length of 702 feet, and a storage capacity of 1238 acre-feet. Situated on the TRIB Embarras River, this dam primarily serves the purpose of recreation, providing a serene environment for water enthusiasts to enjoy various activities.
With a low hazard potential and moderate risk assessment, Walnut Point State Park Lake Dam is regulated by the Illinois Department of Natural Resources (IDNR) and undergoes regular inspections to ensure its safety and functionality. The dam features an uncontrolled spillway and outlet gates, with a maximum discharge capacity of 2925 cubic feet per second. Despite its age, this dam continues to serve its intended purpose effectively, offering a picturesque setting for visitors to appreciate the beauty of nature and water resources.
For water resource and climate enthusiasts, Walnut Point State Park Lake Dam represents not only a recreational spot but also a vital component of the local ecosystem. As a state-regulated structure with a responsibly managed risk assessment, this dam serves as a reminder of the importance of sustainable water management practices in safeguarding our environment for future generations. Its peaceful surroundings and historical significance make it a must-visit destination for those interested in the intersection of water resources, engineering, and natural beauty.
Year Completed |
1967 |
Dam Length |
702 |
Dam Height |
46 |
River Or Stream |
TRIB EMBARRAS RIVER |
Primary Dam Type |
Earth |
Surface Area |
58 |
Drainage Area |
4 |
Nid Storage |
1238 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
46 |
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.
Walnut Point State Park Lake Dam