Springfield Lakeside Ash Disposal Pond Dam Reservoir Report
Last Updated: December 20, 2025
Springfield Lakeside Ash Disposal Pond Dam, located in Sangamon County, Illinois, is a significant earth dam constructed in 1987 with a primary purpose that goes beyond traditional water resource management.
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Summary
Managed by the local government, this dam serves as a crucial element in the Lakeside Ash Disposal Pond, providing storage capacity of 680 acre-feet and a surface area of 37 acres. With a low hazard potential and a moderate risk assessment rating, the dam is designed with a buttress core type and an uncontrolled spillway.
Designed by HANSON ENGINEERS, the Springfield Lakeside Ash Disposal Pond Dam stands at a height of 28 feet and has a length of 3200 feet, showcasing its substantial structure in the region. This dam is state-regulated and regularly inspected, ensuring its compliance with safety regulations and its ability to withstand potential emergencies. The surrounding area benefits from the dam's presence, as it helps manage water levels in Sugar Creek-offstream and contributes to overall environmental protection efforts.
Despite its primary use as an ash disposal pond dam, this structure plays a vital role in water resource management and climate adaptation strategies in the area. With a dedicated inspection frequency and emergency action plan, Springfield Lakeside Ash Disposal Pond Dam exemplifies responsible infrastructure development and underscores the importance of sustainable dam operations in safeguarding communities and ecosystems in Sangamon County, Illinois.
Year Completed |
1987 |
Dam Length |
3200 |
Dam Height |
28 |
River Or Stream |
SUGAR CREEK-OFFSTREAM |
Primary Dam Type |
Earth |
Surface Area |
37 |
Nid Storage |
680 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
South Fork Sangamon River Nr Rochester
|
11cfs |
Spring Creek At Springfield
|
7cfs |
Sangamon River At Riverton
|
125cfs |
Lake Fork Near Cornland
|
17cfs |
Sangamon River At Petersburg
|
209cfs |
Salt Creek Near Greenview
|
204cfs |
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.
Springfield Lakeside Ash Disposal Pond Dam