Rich Lake Dam Reservoir Report
Nearby: Eureka Lake Dam Izaak Walton Lake Dam
Last Updated: December 28, 2025
Rich Lake Dam, located in Woodford County, Illinois, is a private earth dam designed by the USDA NRCS and completed in 1952.
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Summary
The dam's primary purpose is for recreation, providing a storage capacity of 68 acre-feet and a normal storage level of 41 acre-feet. With a height of 21 feet and a length of 440 feet, the dam sits on the TRIB WALNUT CREEK-OFFSTREAM, under the regulatory oversight of the Illinois Department of Natural Resources.
Despite being classified as having a low hazard potential, the dam has a moderate risk rating. It features an uncontrolled spillway and outlet gates, with a five-year inspection frequency to ensure its structural integrity. The last inspection was conducted in April 2018, with the condition assessment listed as not available. Rich Lake Dam's risk management measures and emergency action plan status are currently not provided, highlighting the importance of ongoing monitoring and maintenance for water resource resilience and climate adaptation.
Year Completed |
1952 |
Dam Length |
440 |
Dam Height |
21 |
River Or Stream |
TRIB WALNUT CREEK-OFFSTREAM |
Primary Dam Type |
Earth |
Nid Storage |
68 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
21 |
Seasonal Comparison
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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.
Rich Lake Dam