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Sequoia Energy LLC

Bituminous Coal And Lignite - Surface, Yancey, Kentucky. NPDES permit KY0114171, in force until Aug 31, 2031. No reports in EPA's file for the last 12 months. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 202 form NC monthly (22 values), outfall 203 form R monthly (15 values), outfall 204 form R monthly (15 values), outfall 205 form R monthly (15 values), outfall 206 form R monthly (15 values), outfall 310 form S1 monthly (15 values), and 1 more form
Last report on file
None in EPA's file for the last 12 months; that may be EPA's gap, not the facility's

Limits in force (112)

ParameterStatisticLimitMonthsOutfall
Specific conductancemonthly averagereport only (uS/cm)all year202
Specific conductancedaily maximumreport only (uS/cm)all year202
pHminimum≥ 6 SUall year202
pHmaximum≤ 9 SUall year202
Solids, total suspendedmonthly average≤ 35 mg/Lall year202
Solids, total suspendeddaily maximum≤ 70 mg/Lall year202
Solids, settleablemaximum≤ .5 mL/Lall year202
Solids, settleablemaximum≤ .5 mL/Lall year202
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year202
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year202
Iron, total recoverablemonthly average≤ 3 mg/Lall year202
Iron, total recoverabledaily maximum≤ 4 mg/Lall year202
Manganese, total recoverablemonthly average≤ 2 mg/Lall year202
Manganese, total recoverabledaily maximum≤ 4 mg/Lall year202
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year202
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year202
Date of Sample Collectionvaluereport only (date)all year202
Date of Sample Collectionvaluereport only (date)all year202
Date of Storm Eventvaluereport only (date)all year202
Date of Storm Eventvaluereport only (date)all year202
Precipitation volumemaximumreport only (in/d)all year202
Precipitation volumemaximumreport only (in/d)all year202
Specific conductancemonthly averagereport only (uS/cm)all year203
Specific conductancedaily maximumreport only (uS/cm)all year203
pHminimum≥ 6 SUall year203
pHmaximum≤ 9 SUall year203
Solids, settleablemaximum≤ .5 mL/Lall year203
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year203
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year203
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year203
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year203
Date of Sample Collectionvaluereport only (date)all year203
Date of Sample Collectionvaluereport only (date)all year203
Date of Storm Eventvaluereport only (date)all year203
Date of Storm Eventvaluereport only (date)all year203
Precipitation volumemaximumreport only (in/d)all year203
Precipitation volumemaximumreport only (in/d)all year203
Specific conductancemonthly averagereport only (uS/cm)all year204
Specific conductancedaily maximumreport only (uS/cm)all year204
pHminimum≥ 6 SUall year204
pHmaximum≤ 9 SUall year204
Solids, settleablemaximum≤ .5 mL/Lall year204
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year204
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year204
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year204
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year204
Date of Sample Collectionvaluereport only (date)all year204
Date of Sample Collectionvaluereport only (date)all year204
Date of Storm Eventvaluereport only (date)all year204
Date of Storm Eventvaluereport only (date)all year204
Precipitation volumemaximumreport only (in/d)all year204
Precipitation volumemaximumreport only (in/d)all year204
Specific conductancemonthly averagereport only (uS/cm)all year205
Specific conductancedaily maximumreport only (uS/cm)all year205
pHminimum≥ 6 SUall year205
pHmaximum≤ 9 SUall year205
Solids, settleablemaximum≤ .5 mL/Lall year205
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year205
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year205
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year205
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year205
Date of Sample Collectionvaluereport only (date)all year205
Date of Sample Collectionvaluereport only (date)all year205
Date of Storm Eventvaluereport only (date)all year205
Date of Storm Eventvaluereport only (date)all year205
Precipitation volumemaximumreport only (in/d)all year205
Precipitation volumemaximumreport only (in/d)all year205
Specific conductancemonthly averagereport only (uS/cm)all year206
Specific conductancedaily maximumreport only (uS/cm)all year206
pHminimum≥ 6 SUall year206
pHmaximum≤ 9 SUall year206
Solids, settleablemaximum≤ .5 mL/Lall year206
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year206
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year206
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year206
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year206
Date of Sample Collectionvaluereport only (date)all year206
Date of Sample Collectionvaluereport only (date)all year206
Date of Storm Eventvaluereport only (date)all year206
Date of Storm Eventvaluereport only (date)all year206
Precipitation volumemaximumreport only (in/d)all year206
Precipitation volumemaximumreport only (in/d)all year206
Specific conductancemonthly averagereport only (uS/cm)all year310
Specific conductancedaily maximumreport only (uS/cm)all year310
pHminimum≥ 6 SUall year310
pHmaximum≤ 9 SUall year310
Solids, settleablemaximum≤ .5 mL/Lall year310
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year310
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year310
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year310
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year310
Date of Sample Collectionvaluereport only (date)all year310
Date of Sample Collectionvaluereport only (date)all year310
Date of Storm Eventvaluereport only (date)all year310
Date of Storm Eventvaluereport only (date)all year310
Precipitation volumemaximumreport only (in/d)all year310
Precipitation volumemaximumreport only (in/d)all year310
Specific conductancemonthly averagereport only (uS/cm)all year312
Specific conductancedaily maximumreport only (uS/cm)all year312
pHminimum≥ 6 SUall year312
pHmaximum≤ 9 SUall year312
Solids, settleablemaximum≤ .5 mL/Lall year312
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year312
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year312
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year312
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year312
Date of Sample Collectionvaluereport only (date)all year312
Date of Sample Collectionvaluereport only (date)all year312
Date of Storm Eventvaluereport only (date)all year312
Date of Storm Eventvaluereport only (date)all year312
Precipitation volumemaximumreport only (in/d)all year312
Precipitation volumemaximumreport only (in/d)all year312

How strict are these limits?

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/KY0114171 · MCP: https://passage-data.com/mcp