Woodhaven Lake Dam Reservoir Report
Nearby: Bass Lake Dam Lake Kakusha Dam
Last Updated: December 13, 2025
Woodhaven Lake Dam, located in Lee County, Illinois, is a privately owned structure that serves primarily for recreational purposes.
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Summary
Built in 1975, this earth dam stands at a height of 33 feet and has a length of 262 feet, providing a maximum storage capacity of 456 acre-feet. The dam is situated on the Tributary Green River and is regulated by the Illinois Department of Natural Resources.
With a low hazard potential and a moderate risk assessment rating, Woodhaven Lake Dam is considered to be in good condition, with inspections conducted every five years. The dam features an uncontrolled spillway with a width of 20 feet and outlet gates that are also uncontrolled. While the dam has not been modified in recent years and lacks certain emergency preparedness measures, it continues to provide a valuable recreational resource for the community.
Overall, Woodhaven Lake Dam represents an important piece of infrastructure in the area, offering both recreational opportunities and a source of water storage. As climate enthusiasts and water resource advocates, it is important to stay informed about the condition and management of dams like Woodhaven Lake to ensure their continued safety and functionality for the benefit of both people and the environment.
Year Completed |
1975 |
Dam Length |
262 |
Dam Height |
33 |
River Or Stream |
TRIB GREEN RIVER |
Primary Dam Type |
Earth |
Nid Storage |
456 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
33 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Big Bureau Creek At Princeton
|
8cfs |
East Bureau Creek Near Bureau
|
2cfs |
Rock River At Como
|
3350cfs |
Elkhorn Creek Near Penrose
|
44cfs |
Rock River At Byron
|
4300cfs |
Fox River At Dayton
|
1040cfs |
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.
Woodhaven Lake Dam