Coulterville Coal/Gateway Mine/Slurry Cell 3 Dam
Key Takeaway
Coulterville Coal/Gateway Mine/Slurry Cell 3 Dam is classified as high hazard in Illinois. It was completed in 1990 and is 36 years old. Its primary use is other. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 41 ft (taller than 84.9% in IL) |
| Dam Length | 7,400 ft |
| Dam Type | Earth |
| Max Storage | 6.0K acre-ft |
| Normal Storage | 0 acre-ft |
| Max Discharge | 20 cfs |
| Year Completed | 1990 (36 years old) |
| NID ID | IL50115 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
COULTERVILLE COAL COMPANY, LLC
Private
Nearby Dams
Coulterville Coal/Gateway Mine/Slurry Cell 4 Dam
Randolph, IL
Low Hazard 34 ftCoulterville Coal/Gateway Mine/Slurry Cell 1 Dam
Randolph, IL
Low Hazard 33 ftPeabody Coulterville/Gateway/Slurry Cell 5 Dam
Randolph, IL
Low Hazard 66 ftCoulterville Coal/Gateway Mine/Slurry Cell 2 Dam
Randolph, IL
Significant Hazard 35 ftZeigler Coal Company Lake
Randolph, IL
Low Hazard 19 ftCoulterville City Reservoir Dam
Randolph, IL
Low Hazard 15 ftLake Coulterville Dam
Randolph, IL
Low Hazard 18 ftSparta New City Reservoir Dam
Randolph, IL
Significant Hazard 16 ftFrequently Asked Questions
What is the hazard classification of Coulterville Coal/Gateway Mine/Slurry Cell 3 Dam?
Coulterville Coal/Gateway Mine/Slurry Cell 3 Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Coulterville Coal/Gateway Mine/Slurry Cell 3 Dam?
Coulterville Coal/Gateway Mine/Slurry Cell 3 Dam is owned by COULTERVILLE COAL COMPANY, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Coulterville Coal/Gateway Mine/Slurry Cell 3 Dam built?
Coulterville Coal/Gateway Mine/Slurry Cell 3 Dam was completed in 1990, making it 36 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Coulterville Coal/Gateway Mine/Slurry Cell 3 Dam?
Coulterville Coal/Gateway Mine/Slurry Cell 3 Dam serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Coulterville Coal/Gateway Mine/Slurry Cell 3 Dam?
Coulterville Coal/Gateway Mine/Slurry Cell 3 Dam has a dam height of 41 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Coulterville Coal/Gateway Mine/Slurry Cell 3 Dam last inspected?
Coulterville Coal/Gateway Mine/Slurry Cell 3 Dam was last inspected on October 10, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.