Coulterville Coal/gateway Mine/slurry Cell 1 Dam is an earth dam located in Randolph County, Illinois, built in 1977. It carries a Low hazard potential classification.
Dam profile
NID height · 33 ft33 ft tall and 7,180 ft long, taller than 76% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Coulterville Coal/gateway Mine/slurry Cell 1 Dam
Coulterville Coal/gateway Mine/slurry Cell 1 Dam is a dam in Randolph, Illinois. The dam is owned by Coulterville Coal Company, LLC (private). It impounds the Trib Marys River near Tilden.
The dam stands 33 feet tall and stretches 7,180 feet across, and has a maximum storage capacity of 5,035 acre-feet. Completed in 1977, the structure is 49 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 09/30/2024.
At 33 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | Illinois |
| County | Randolph |
| Nearest City | Tilden |
| River/Stream | Trib Marys River |
| Coordinates | 38.17306, -89.63808 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Dam Length | 7,180 ft |
| Year Completed | 1977 (49 years old) |
Storage & Hydraulics
| NID Storage | 5,035 acre-ft |
| Max Storage | 5,035 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Coulterville Coal Company, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 09/30/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL50177 |
| Federal ID | IL50177 |
| More Info | State Dam Safety Program |