Clay Hollow Slurry Impoundment
Clay Hollow Slurry Impoundment is an earth dam located in Letcher County, Kentucky. It carries a High hazard potential classification.
About Clay Hollow Slurry Impoundment
The primary purpose of Clay Hollow Slurry Impoundment is tailings. Tailings dams contain waste material from mining operations — typically a slurry of finely ground rock left over after valuable minerals have been extracted. These structures require ongoing monitoring because tailings can contain heavy metals and other contaminants. The dam is owned by Sapphire Coal Company (private).
The dam stands 375 feet tall and stretches 1,400 feet across, and has a maximum storage capacity of 10,590 acre-feet.
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.
At 375 feet, this dam is taller than 99% 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 Kentucky 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 | Kentucky |
| County | Letcher |
| Nearest City | Polly |
| Coordinates | 37.19167, -82.82083 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 375 ft |
| Dam Height | 375 ft |
| Dam Length | 1,400 ft |
Storage & Hydraulics
| NID Storage | 10,590 acre-ft |
| Max Storage | 10,590 acre-ft |
Ownership & Safety
| Purpose | Tailings |
| Owner | Sapphire Coal Company |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | KY83451 |
| Federal ID | KY83451 |
| More Info | State Dam Safety Program |