Coffeen Station Coal Yard Pond Dam Reservoir Report
Last Updated: December 5, 2025
Coffeen Station Coal Yard Pond Dam, located in Montgomery County, Illinois, is a privately owned structure designed by Hanson, Stearns-Roger with a height of 20 feet and a length of 600 feet.
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Summary
Completed in 1979, this Earth dam serves a primary purpose of "Other" and is classified as a Buttress core type. It is regulated by the Illinois Department of Natural Resources and undergoes regular inspections, with a significant hazard potential rating.
The dam's main function is to control water flow in the Trib Lake Coffeen tributary, providing storage capacity of 45 acre-feet. Despite its age, the dam is in satisfactory condition, as its assessment is not currently available. However, its risk assessment is rated as very high, indicating the importance of proper maintenance and emergency preparedness measures. The dam does not have outlet gates and is equipped with a controlled spillway that is 2 feet wide.
Given the critical role of Coffeen Station Coal Yard Pond Dam in managing water resources and mitigating flood risks in the area, continued monitoring and investment in its upkeep are essential. Climate enthusiasts and water resource experts can appreciate the structural design, regulatory oversight, and risk assessment of this significant dam in Illinois.
Year Completed |
1979 |
Dam Length |
600 |
Dam Height |
20 |
River Or Stream |
TRIB LAKE COFFEEN |
Primary Dam Type |
Earth |
Nid Storage |
45 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
20 |
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.
Coffeen Station Coal Yard Pond Dam