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Bituminous Coal And Lignite - Surface, Hyden, Kentucky. NPDES permit KY0112844 expired Mar 31, 2025; its limits still apply. Last 12 months: no values over a limit, 36 required values missing, 2 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Specific conductance | monthly average | report only (uS/cm) | all year |
| Specific conductance | daily maximum | report only (uS/cm) | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, settleable | maximum | ≤ .5 mL/L | all year |
| Solids, settleable | maximum | ≤ .5 mL/L | all year |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year |
| Iron, total recoverable | monthly average | ≤ 3 mg/L | all year |
| Iron, total recoverable | daily maximum | ≤ 4 mg/L | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Date of Sample Collection | value | report only (date) | all year |
| Date of Sample Collection | value | report only (date) | all year |
| Date of Storm Event | value | report only (date) | all year |
| Date of Storm Event | value | report only (date) | all year |
| Precipitation volume | maximum | report only (in/d) | all year |
| Precipitation volume | maximum | report only (in/d) | all year |
Cited limits by parameter: Kentucky's rules and the federal ones.
Same industry: the 66 Coal Mining permits in Kentucky.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/KY0112844 · MCP: https://passage-data.com/mcp