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Ouro Mining, Inc - Bates Mine

Bituminous Coal And Lignite - Surface, Bates, Arkansas. NPDES permit AR0051900, in force until Apr 30, 2028. Last 12 months: over a limit 4 times (last March 2026), 24 of 143 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form A monthly (8 values), outfall 001 form B monthly (8 values), outfall 001 form C monthly (8 values), outfall 003 form A monthly (6 values), outfall 003 form B monthly (6 values), outfall 004 form A monthly (6 values), and 7 more forms
Renewal application due
Nov 2, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 32 required values missing, 50 of 156 reports late

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

Period endingOutfallParameterReportedLimitOver by
January 2026005Solids, settleable, daily maximum1 mL/L≤ .5 mL/L100%
January 2026006Solids, settleable, daily maximum1 mL/L≤ .5 mL/L100%
March 2026005Solids, settleable, daily maximum5 mL/L≤ .5 mL/L900%
March 2026006Solids, settleable, daily maximum4 mL/L≤ .5 mL/L700%

Limits in force (84)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6 SUall year001
pHminimum≥ 6 SUall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
pHmaximum≤ 9 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 35 mg/Lall year001
Solids, total suspendedmonthly average≤ 35 mg/Lall year001
Solids, total suspendeddaily maximum≤ 70 mg/Lall year001
Solids, total suspendeddaily maximum≤ 70 mg/Lall year001
Solids, settleablemonthly averagereport only (mL/L)all year001
Solids, settleabledaily maximum≤ .5 mL/Lall year001
Iron, total [as Fe]monthly average≤ 3.5 mg/Lall year001
Iron, total [as Fe]monthly averagereport only (mg/L)all year001
Iron, total [as Fe]monthly averagereport only (mg/L)all year001
Iron, total [as Fe]daily maximum≤ 7 mg/Lall year001
Iron, total [as Fe]daily maximumreport only (mg/L)all year001
Iron, total [as Fe]daily maximumreport only (mg/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
pHminimum≥ 6 SUall year003
pHminimum≥ 6 SUall year003
pHmaximum≤ 9 SUall year003
pHmaximum≤ 9 SUall year003
Solids, settleablemonthly averagereport only (mL/L)all year003
Solids, settleablemonthly averagereport only (mL/L)all year003
Solids, settleabledaily maximum≤ .5 mL/Lall year003
Solids, settleabledaily maximum≤ .5 mL/Lall year003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
pHminimum≥ 6 SUall year004
pHminimum≥ 6 SUall year004
pHmaximum≤ 9 SUall year004
pHmaximum≤ 9 SUall year004
Solids, settleablemonthly averagereport only (mL/L)all year004
Solids, settleablemonthly averagereport only (mL/L)all year004
Solids, settleabledaily maximum≤ .5 mL/Lall year004
Solids, settleabledaily maximum≤ .5 mL/Lall year004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year004
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year004
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year004
pHminimum≥ 6 SUall year005
pHminimum≥ 6 SUall year005
pHmaximum≤ 9 SUall year005
pHmaximum≤ 9 SUall year005
Solids, settleablemonthly averagereport only (mL/L)all year005
Solids, settleablemonthly averagereport only (mL/L)all year005
Solids, settleabledaily maximum≤ .5 mL/Lall year005
Solids, settleabledaily maximum≤ .5 mL/Lall year005
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year005
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year005
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year005
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year005
pHminimum≥ 6 SUall year006
pHminimum≥ 6 SUall year006
pHmaximum≤ 9 SUall year006
pHmaximum≤ 9 SUall year006
Solids, settleablemonthly averagereport only (mL/L)all year006
Solids, settleablemonthly averagereport only (mL/L)all year006
Solids, settleabledaily maximum≤ .5 mL/Lall year006
Solids, settleabledaily maximum≤ .5 mL/Lall year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
pHminimum≥ 6 SUall year007
pHminimum≥ 6 SUall year007
pHmaximum≤ 9 SUall year007
pHmaximum≤ 9 SUall year007
Solids, settleablemonthly averagereport only (mL/L)all year007
Solids, settleablemonthly averagereport only (mL/L)all year007
Solids, settleabledaily maximum≤ .5 mL/Lall year007
Solids, settleabledaily maximum≤ .5 mL/Lall year007
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/AR0051900 · MCP: https://passage-data.com/mcp