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Responsible Energy Operations LLC Antioch Mine

Bituminous Coal And Lignite - Surface, Montgomery, Indiana. NPDES permit ING040207, in force until Mar 31, 2030. Last 12 months: over a limit 4 times (last May 2026), 43 of 77 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 004 form A monthly (12 values), outfall 005 form A monthly (12 values), outfall 006 form A monthly (22 values), outfall 011 form A monthly (12 values), outfall 013 form A monthly (12 values), outfall 014 form A monthly (12 values), and 1 more form
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 35 of 84 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingOutfallParameterReportedLimitOver by
March 2026011Iron, total [as Fe], daily average3.16 mg/L≤ 3 mg/L5%
March 2026011Solids, total suspended, daily average96 mg/L≤ 35 mg/L174%
March 2026011Solids, total suspended, daily maximum96 mg/L≤ 70 mg/L37%
May 2026006Manganese, total [as Mn], daily average2.34 mg/L≤ 2 mg/L17%

Limits in force (94)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6 SUall year004
pHdaily maximum≤ 9 SUall year004
Solids, total suspendeddaily average≤ 35 mg/Lall year004
Solids, total suspendeddaily maximum≤ 70 mg/Lall year004
Solids, settleabledaily averagereport only (mL/L)all year004
Solids, settleabledaily maximum≤ .5 mL/Lall year004
Iron, total [as Fe]daily average≤ 3 mg/Lall year004
Iron, total [as Fe]daily maximum≤ 6 mg/Lall year004
Durationmonthly totalreport only (d/mo)all year004
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year004
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year004
Precipitation volumemonthly totalreport only (in/mo)all year004
pHdaily minimum≥ 6 SUall year005
pHdaily maximum≤ 9 SUall year005
Solids, total suspendeddaily average≤ 35 mg/Lall year005
Solids, total suspendeddaily maximum≤ 70 mg/Lall year005
Solids, settleabledaily averagereport only (mL/L)all year005
Solids, settleabledaily maximum≤ .5 mL/Lall year005
Iron, total [as Fe]daily average≤ 3 mg/Lall year005
Iron, total [as Fe]daily maximum≤ 6 mg/Lall year005
Durationmonthly totalreport only (d/mo)all year005
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year005
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year005
Precipitation volumemonthly totalreport only (in/mo)all year005
pHdaily minimum≥ 6 SUall year006
pHdaily maximum≤ 9 SUall year006
Solids, total suspendeddaily average≤ 35 mg/Lall year006
Solids, total suspendeddaily maximum≤ 70 mg/Lall year006
Solids, settleabledaily averagereport only (mL/L)all year006
Solids, settleabledaily maximum≤ .5 mL/Lall year006
Copper, total [as Cu]daily averagereport only (mg/L)all year006
Copper, total [as Cu]daily maximumreport only (mg/L)all year006
Iron, total [as Fe]daily average≤ 3 mg/Lall year006
Iron, total [as Fe]daily maximum≤ 6 mg/Lall year006
Manganese, total [as Mn]daily average≤ 2 mg/Lall year006
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year006
Nickel, total [as Ni]daily averagereport only (mg/L)all year006
Nickel, total [as Ni]daily maximumreport only (mg/L)all year006
Zinc, total [as Zn]daily averagereport only (mg/L)all year006
Zinc, total [as Zn]daily maximumreport only (mg/L)all year006
Aluminum, total [as Al]daily averagereport only (mg/L)all year006
Aluminum, total [as Al]daily minimumreport only (mg/L)all year006
Durationmonthly totalreport only (d/mo)all year006
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
Precipitation volumemonthly totalreport only (in/mo)all year006
pHdaily minimum≥ 6 SUall year011
pHdaily maximum≤ 9 SUall year011
Solids, total suspendeddaily average≤ 35 mg/Lall year011
Solids, total suspendeddaily maximum≤ 70 mg/Lall year011
Solids, settleabledaily averagereport only (mL/L)all year011
Solids, settleabledaily maximum≤ .5 mL/Lall year011
Iron, total [as Fe]daily average≤ 3 mg/Lall year011
Iron, total [as Fe]daily maximum≤ 6 mg/Lall year011
Durationmonthly totalreport only (d/mo)all year011
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year011
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year011
Precipitation volumemonthly totalreport only (in/mo)all year011
pHdaily minimum≥ 6 SUall year013
pHdaily maximum≤ 9 SUall year013
Solids, total suspendeddaily average≤ 35 mg/Lall year013
Solids, total suspendeddaily maximum≤ 70 mg/Lall year013
Solids, settleabledaily averagereport only (mL/L)all year013
Solids, settleabledaily maximum≤ .5 mL/Lall year013
Iron, total [as Fe]daily average≤ 3 mg/Lall year013
Iron, total [as Fe]daily maximum≤ 6 mg/Lall year013
Durationmonthly totalreport only (d/mo)all year013
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year013
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year013
Precipitation volumemonthly totalreport only (in/mo)all year013
pHdaily minimum≥ 6 SUall year014
pHdaily maximum≤ 9 SUall year014
Solids, total suspendeddaily average≤ 35 mg/Lall year014
Solids, total suspendeddaily maximum≤ 70 mg/Lall year014
Solids, settleabledaily averagereport only (mL/L)all year014
Solids, settleabledaily maximum≤ .5 mL/Lall year014
Iron, total [as Fe]daily average≤ 3 mg/Lall year014
Iron, total [as Fe]daily maximum≤ 6 mg/Lall year014
Durationmonthly totalreport only (d/mo)all year014
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year014
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year014
Precipitation volumemonthly totalreport only (in/mo)all year014
pHdaily minimum≥ 6 SUall year016
pHdaily maximum≤ 9 SUall year016
Solids, total suspendeddaily average≤ 35 mg/Lall year016
Solids, total suspendeddaily maximum≤ 70 mg/Lall year016
Solids, settleabledaily averagereport only (mL/L)all year016
Solids, settleabledaily maximum≤ .5 mL/Lall year016
Iron, total [as Fe]daily average≤ 3 mg/Lall year016
Iron, total [as Fe]daily maximum≤ 6 mg/Lall year016
Durationmonthly totalreport only (d/mo)all year016
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year016
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year016
Precipitation volumemonthly totalreport only (in/mo)all year016

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

Same industry: the 38 Coal Mining permits in Indiana.

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Your permit document is the final word. As JSON: /api/v1/permits/ING040207 · MCP: https://passage-data.com/mcp