International Coal/viper/slurry Impoundment
International Coal/viper/slurry Impoundment is an earth dam located in Logan County, Illinois, built in 1984. It carries a High hazard potential classification.
About International Coal/viper/slurry Impoundment
International Coal/viper/slurry Impoundment is a dam in Logan, Illinois. The dam is owned by International Coal Group, Inc. (private). It impounds the North Ditch near Elkhart.
The dam stands 109 feet tall and stretches 11,950 feet across, creates a reservoir covering 78 acres, and has a maximum storage capacity of 3,898 acre-feet. Completed in 1984, the structure is 42 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. An emergency action plan is in place for this dam.
At 109 feet, this dam is taller than 98% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Illinois dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Illinois |
| County | Logan |
| Nearest City | Elkhart |
| River/Stream | North Ditch |
| Coordinates | 40.00019, -89.44816 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 109 ft |
| Dam Height | 109 ft |
| Dam Length | 11,950 ft |
| Year Completed | 1984 (42 years old) |
Storage & Hydraulics
| NID Storage | 3,898 acre-ft |
| Max Storage | 3,898 acre-ft |
| Normal Storage | 3,214 acre-ft |
| Surface Area | 78 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | INTERNATIONAL COAL GROUP, INC. |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IL50015 |
| Federal ID | IL50015 |
| More Info | State Dam Safety Program |