Ramsey Lake Dam Reservoir Report
Last Updated: December 5, 2025
Ramsey Lake Dam, located in Vandalia, Illinois, is a state-regulated earth dam with a primary purpose of recreation.
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Summary
Completed in 1948, this dam stands at a height of 43 feet and has a length of 487 feet, providing a maximum storage capacity of 1064 acre-feet. The dam is situated on Ramsey Creek, with a drainage area of 2.3 square miles and a surface area of 47 acres.
Despite its low hazard potential, Ramsey Lake Dam has a moderate risk assessment rating, indicating the need for continued monitoring and management measures. The dam features an uncontrolled spillway with a width of 92 feet and outlet gates that are also uncontrolled. The last inspection of the dam was conducted in April 2018, with a scheduled inspection frequency of every 5 years. While the condition assessment of the dam is currently not available, it is important for water resource and climate enthusiasts to stay informed about the risk factors associated with this structure.
With its picturesque location and recreational value, Ramsey Lake Dam serves as a vital asset for the community. As a significant water resource in Fayette County, Illinois, the dam provides opportunities for outdoor activities and scenic enjoyment. Climate enthusiasts can appreciate the role of this dam in supporting the local ecosystem and water supply, while also recognizing the importance of maintaining its structural integrity and risk management protocols.
Year Completed |
1948 |
Dam Length |
487 |
Dam Height |
43 |
River Or Stream |
TRIB RAMSEY CREEK |
Primary Dam Type |
Earth |
Surface Area |
47 |
Drainage Area |
2.3 |
Nid Storage |
1064 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
43 |
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.
Ramsey Lake Dam