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Cornerstone Mining, LLC

Bituminous Coal And Lignite - Surface, Princeton, West Virginia. NPDES permit WV1023870 expired Sep 15, 2026; its limits still apply. Last 12 months: no values over a limit, 396 required values missing, 26 of 78 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 26 days after each period: outfall 001 form R quarterly (5 values), outfall 002 form R quarterly (5 values), outfall 003 form R quarterly (5 values), outfall 004 form R quarterly (5 values), outfall 005 form R quarterly (5 values), outfall 006 form R quarterly (5 values), and 20 more forms
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 78 of 104 reports late

Limits in force (132)

ParameterStatisticLimitMonthsOutfall
Flow ratemonthly averagereport only (gal/min)all year001
Flow ratemonthly maximumreport only (gal/min)all year001
pHmonthly minimum≥ 6 SUall year001
pHmonthly maximum≤ 9 SUall year001
Solids, settleablemonthly maximum≤ .5 mL/Lall year001
Flow ratemonthly averagereport only (gal/min)all year002
Flow ratemonthly maximumreport only (gal/min)all year002
pHmonthly minimum≥ 6 SUall year002
pHmonthly maximum≤ 9 SUall year002
Solids, settleablemonthly maximum≤ .5 mL/Lall year002
Flow ratemonthly averagereport only (gal/min)all year003
Flow ratemonthly maximumreport only (gal/min)all year003
pHmonthly minimum≥ 6 SUall year003
pHmonthly maximum≤ 9 SUall year003
Solids, settleablemonthly maximum≤ .5 mL/Lall year003
Flow ratemonthly averagereport only (gal/min)all year004
Flow ratemonthly maximumreport only (gal/min)all year004
pHmonthly minimum≥ 6 SUall year004
pHmonthly maximum≤ 9 SUall year004
Solids, settleablemonthly maximum≤ .5 mL/Lall year004
Flow ratemonthly averagereport only (gal/min)all year005
Flow ratemonthly maximumreport only (gal/min)all year005
pHmonthly minimum≥ 6 SUall year005
pHmonthly maximum≤ 9 SUall year005
Solids, settleablemonthly maximum≤ .5 mL/Lall year005
Flow ratemonthly averagereport only (gal/min)all year006
Flow ratemonthly maximumreport only (gal/min)all year006
pHmonthly minimum≥ 6 SUall year006
pHmonthly maximum≤ 9 SUall year006
Solids, settleablemonthly maximum≤ .5 mL/Lall year006
Flow ratemonthly averagereport only (gal/min)all year007
Flow ratemonthly maximumreport only (gal/min)all year007
pHmonthly minimum≥ 6 SUall year007
pHmonthly maximum≤ 9 SUall year007
Solids, settleablemonthly maximum≤ .5 mL/Lall year007
Flow ratemonthly averagereport only (gal/min)all year008
Flow ratemonthly maximumreport only (gal/min)all year008
pHmonthly minimum≥ 6 SUall year008
pHmonthly maximum≤ 9 SUall year008
Solids, settleablemonthly maximum≤ .5 mL/Lall year008
Flow ratemonthly averagereport only (gal/min)all year009
Flow ratemonthly maximumreport only (gal/min)all year009
pHmonthly minimum≥ 6 SUall year009
pHmonthly maximum≤ 9 SUall year009
Solids, settleablemonthly maximum≤ .5 mL/Lall year009
Flow ratemonthly averagereport only (gal/min)all year010
Flow ratemonthly maximumreport only (gal/min)all year010
pHmonthly minimum≥ 6 SUall year010
pHmonthly maximum≤ 9 SUall year010
Solids, settleablemonthly maximum≤ .5 mL/Lall year010
Flow ratemonthly averagereport only (gal/min)all year011
Flow ratemonthly maximumreport only (gal/min)all year011
pHmonthly minimum≥ 6 SUall year011
pHmonthly maximum≤ 9 SUall year011
Solids, settleablemonthly maximum≤ .5 mL/Lall year011
Flow ratemonthly averagereport only (gal/min)all year012
Flow ratemonthly maximumreport only (gal/min)all year012
pHmonthly minimum≥ 6 SUall year012
pHmonthly maximum≤ 9 SUall year012
Solids, settleablemonthly maximum≤ .5 mL/Lall year012
Flow ratemonthly averagereport only (gal/min)all year013
Flow ratemonthly maximumreport only (gal/min)all year013
pHmonthly minimum≥ 6 SUall year013
pHmonthly maximum≤ 9 SUall year013
Solids, settleablemonthly maximum≤ .5 mL/Lall year013
Flow ratemonthly averagereport only (gal/min)all year014
Flow ratemonthly maximumreport only (gal/min)all year014
pHmonthly minimum≥ 6 SUall year014
pHmonthly maximum≤ 9 SUall year014
Solids, settleablemonthly maximum≤ .5 mL/Lall year014
Flow ratemonthly averagereport only (gal/min)all year018
Flow ratemonthly maximumreport only (gal/min)all year018
pHmonthly minimum≥ 6 SUall year018
pHmonthly maximum≤ 9 SUall year018
Solids, settleablemonthly maximum≤ .5 mL/Lall year018
Flow ratemonthly averagereport only (gal/min)all year019
Flow ratemonthly maximumreport only (gal/min)all year019
pHmonthly minimum≥ 6 SUall year019
pHmonthly maximum≤ 9 SUall year019
Solids, settleablemonthly maximum≤ .5 mL/Lall year019
Flow ratemonthly averagereport only (gal/min)all year020
Flow ratemonthly maximumreport only (gal/min)all year020
pHmonthly minimum≥ 6 SUall year020
pHmonthly maximum≤ 9 SUall year020
Solids, settleablemonthly maximum≤ .5 mL/Lall year020
Flow ratemonthly averagereport only (gal/min)all year021
Flow ratemonthly maximumreport only (gal/min)all year021
pHmonthly minimum≥ 6 SUall year021
pHmonthly maximum≤ 9 SUall year021
Solids, settleablemonthly maximum≤ .5 mL/Lall year021
Flow ratemonthly averagereport only (gal/min)all year022
Flow ratemonthly maximumreport only (gal/min)all year022
pHmonthly minimum≥ 6 SUall year022
pHmonthly maximum≤ 9 SUall year022
Solids, settleablemonthly maximum≤ .5 mL/Lall year022
Stream flow, instantaneousmonthly averagereport only (cfs)all yearDSBB
Stream flow, instantaneousmonthly maximumreport only (cfs)all yearDSBB
pHmonthly minimum≥ 6 SUall yearDSBB
pHmonthly maximum≤ 9 SUall yearDSBB
Solids, settleablemonthly maximum≤ .5 mL/Lall yearDSBB
Stream flow, instantaneousmonthly averagereport only (cfs)all yearDSCC2
Stream flow, instantaneousmonthly maximumreport only (cfs)all yearDSCC2
pHmonthly minimumreport only (SU)all yearDSCC2
pHmonthly maximumreport only (SU)all yearDSCC2
Solids, settleablemonthly minimumreport only (mL/L)all yearDSCC2
Solids, settleablemonthly averagereport only (mL/L)all yearDSCC2
Solids, settleablemonthly maximumreport only (mL/L)all yearDSCC2
Stream flow, instantaneousmonthly averagereport only (cfs)all yearDSGB
Stream flow, instantaneousmonthly maximumreport only (cfs)all yearDSGB
pHmonthly minimum≥ 6 SUall yearDSGB
pHmonthly maximum≤ 9 SUall yearDSGB
Solids, settleablemonthly maximum≤ .5 mL/Lall yearDSGB
Stream flow, instantaneousmonthly averagereport only (cfs)all yearDSUT
Stream flow, instantaneousmonthly maximumreport only (cfs)all yearDSUT
pHmonthly minimumreport only (SU)all yearDSUT
pHmonthly maximumreport only (SU)all yearDSUT
Solids, settleablemonthly maximum≤ .5 mL/Lall yearDSUT
Stream flow, instantaneousmonthly averagereport only (cfs)all yearDSUTCC6
Stream flow, instantaneousmonthly maximumreport only (cfs)all yearDSUTCC6
pHmonthly minimum≥ 6 SUall yearDSUTCC6
pHmonthly maximum≤ 9 SUall yearDSUTCC6
Solids, settleablemonthly maximum≤ .5 mL/Lall yearDSUTCC6
Stream flow, instantaneousmonthly averagereport only (cfs)all yearDSUTGB01
Stream flow, instantaneousmonthly maximumreport only (cfs)all yearDSUTGB01
pHmonthly minimum≥ 6 SUall yearDSUTGB01
pHmonthly maximum≤ 9 SUall yearDSUTGB01
Solids, settleablemonthly maximum≤ .5 mL/Lall yearDSUTGB01
Stream flow, instantaneousmonthly averagereport only (cfs)all yearDSUTGB02
Stream flow, instantaneousmonthly maximumreport only (cfs)all yearDSUTGB02
pHmonthly minimum≥ 6 SUall yearDSUTGB02
pHmonthly maximum≤ 9 SUall yearDSUTGB02
Solids, settleablemonthly maximum≤ .5 mL/Lall yearDSUTGB02

Cited limits by parameter: West Virginia's rules and the federal ones.

Same industry: the 1,301 Coal Mining permits in West Virginia.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WV1023870 · MCP: https://passage-data.com/mcp