Spring Lake Dam Reservoir Report
Last Updated: December 17, 2025
Spring Lake Dam, located in Monticello, Illinois, is a privately owned structure with a primary purpose of recreation.
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Summary
Built in 1964, this earth dam stands at 28 feet high and stretches 700 feet in length, providing a storage capacity of 448 acre-feet. The dam overlooks the picturesque Tributary of Sangamon River, offering a serene setting for water resource and climate enthusiasts to appreciate the beauty of the surrounding area.
Managed by the Illinois Department of Natural Resources, the dam has a low hazard potential and is inspected every five years to ensure its structural integrity. With an uncontrolled spillway and outlet gates, Spring Lake Dam poses a moderate risk, although no condition assessment is currently available. Despite its age, the dam continues to serve its purpose for recreational activities, attracting visitors to its tranquil waters and scenic surroundings.
As a pivotal feature in the Champaign County landscape, Spring Lake Dam serves as a vital recreational resource for the community. With its historic significance dating back to the 1960s, the dam's moderate risk level underscores the importance of ongoing maintenance and inspection to ensure the safety of both visitors and the surrounding environment. For water resource and climate enthusiasts, Spring Lake Dam offers a unique opportunity to explore and appreciate the delicate balance between human recreation and natural ecosystem preservation.
Year Completed |
1964 |
Dam Length |
700 |
Dam Height |
28 |
River Or Stream |
TRIB SANGAMON RIVER |
Primary Dam Type |
Earth |
Nid Storage |
448 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
28 |
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.
Spring Lake Dam