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Bituminous Coal And Lignite - Surface, Gillette, Wyoming. NPDES permit WY0028479, in force until Jul 31, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | daily average | ≤ 35 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 001 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 001 |
| Iron, total [as Fe] | daily average | ≤ 3.5 mg/L | all year | 001 |
| Iron, total [as Fe] | daily maximum | ≤ 7 mg/L | all year | 001 |
| Iron, dissolved [as Fe] | daily maximum | ≤ 1000 ug/L | all year | 001 |
| Manganese, dissolved [as Mn] | daily maximum | ≤ 1462 ug/L | all year | 001 |
| Duration | monthly total | report only (d/mo) | all year | 001 |
| Flow | monthly average | report only (MGD) | all year | 001 |
| Flow | instantaneous maximum | report only (MGD) | all year | 001 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 007 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 007 |
| Solids, total suspended | daily average | ≤ 35 mg/L | all year | 007 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 007 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 007 |
| Iron, total [as Fe] | daily average | ≤ 3.5 mg/L | all year | 007 |
| Iron, total [as Fe] | daily maximum | ≤ 7 mg/L | all year | 007 |
| Iron, dissolved [as Fe] | daily maximum | ≤ 1000 ug/L | all year | 007 |
| Manganese, dissolved [as Mn] | daily maximum | ≤ 1462 ug/L | all year | 007 |
| Duration | monthly total | report only (d/mo) | all year | 007 |
| Flow | monthly average | report only (MGD) | all year | 007 |
| Flow | instantaneous maximum | report only (MGD) | all year | 007 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 009 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 009 |
| Solids, total suspended | daily average | ≤ 35 mg/L | all year | 009 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 009 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 009 |
| Iron, total [as Fe] | daily average | ≤ 3.5 mg/L | all year | 009 |
| Iron, total [as Fe] | daily maximum | ≤ 7 mg/L | all year | 009 |
| Iron, dissolved [as Fe] | daily maximum | ≤ 1000 ug/L | all year | 009 |
| Manganese, dissolved [as Mn] | daily maximum | ≤ 1462 ug/L | all year | 009 |
| Duration | monthly total | report only (d/mo) | all year | 009 |
| Flow | monthly average | report only (MGD) | all year | 009 |
| Flow | instantaneous maximum | report only (MGD) | all year | 009 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 010 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 010 |
| Solids, total suspended | daily average | ≤ 35 mg/L | all year | 010 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 010 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 010 |
| Iron, total [as Fe] | daily average | ≤ 3.5 mg/L | all year | 010 |
| Iron, total [as Fe] | daily maximum | ≤ 7 mg/L | all year | 010 |
| Iron, dissolved [as Fe] | daily maximum | ≤ 1000 ug/L | all year | 010 |
| Manganese, dissolved [as Mn] | daily maximum | ≤ 1462 ug/L | all year | 010 |
| Duration | monthly total | report only (d/mo) | all year | 010 |
| Flow | monthly average | report only (MGD) | all year | 010 |
| Flow | instantaneous maximum | report only (MGD) | all year | 010 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 011 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 011 |
| Solids, total suspended | daily average | ≤ 35 mg/L | all year | 011 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 011 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 011 |
| Iron, total [as Fe] | daily average | ≤ 3.5 mg/L | all year | 011 |
| Iron, total [as Fe] | daily maximum | ≤ 7 mg/L | all year | 011 |
| Iron, dissolved [as Fe] | daily maximum | ≤ 1000 ug/L | all year | 011 |
| Manganese, dissolved [as Mn] | daily maximum | ≤ 1462 ug/L | all year | 011 |
| Duration | monthly total | report only (d/mo) | all year | 011 |
| Flow | monthly average | report only (MGD) | all year | 011 |
| Flow | instantaneous maximum | report only (MGD) | all year | 011 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 013 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 013 |
| Solids, total suspended | daily average | ≤ 35 mg/L | all year | 013 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 013 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 013 |
| Iron, total [as Fe] | daily average | ≤ 3.5 mg/L | all year | 013 |
| Iron, total [as Fe] | daily maximum | ≤ 7 mg/L | all year | 013 |
| Iron, dissolved [as Fe] | daily maximum | ≤ 1000 ug/L | all year | 013 |
| Manganese, dissolved [as Mn] | daily maximum | ≤ 1462 ug/L | all year | 013 |
| Duration | monthly total | report only (d/mo) | all year | 013 |
| Flow | monthly average | report only (MGD) | all year | 013 |
| Flow | instantaneous maximum | report only (MGD) | all year | 013 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 014 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 014 |
| Solids, total suspended | daily average | ≤ 35 mg/L | all year | 014 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 014 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 014 |
| Iron, total [as Fe] | daily average | ≤ 3.5 mg/L | all year | 014 |
| Iron, total [as Fe] | daily maximum | ≤ 7 mg/L | all year | 014 |
| Iron, dissolved [as Fe] | daily maximum | ≤ 1000 ug/L | all year | 014 |
| Manganese, dissolved [as Mn] | daily maximum | ≤ 1462 ug/L | all year | 014 |
| Duration | monthly total | report only (d/mo) | all year | 014 |
| Flow | monthly average | report only (MGD) | all year | 014 |
| Flow | instantaneous maximum | report only (MGD) | all year | 014 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 016 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 016 |
| Solids, total suspended | daily average | ≤ 35 mg/L | all year | 016 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 016 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 016 |
| Iron, total [as Fe] | daily average | ≤ 3.5 mg/L | all year | 016 |
| Iron, total [as Fe] | daily maximum | ≤ 7 mg/L | all year | 016 |
| Iron, dissolved [as Fe] | daily maximum | ≤ 1000 ug/L | all year | 016 |
| Manganese, dissolved [as Mn] | daily maximum | ≤ 1462 ug/L | all year | 016 |
| Duration | monthly total | report only (d/mo) | all year | 016 |
| Flow | monthly average | report only (MGD) | all year | 016 |
| Flow | instantaneous maximum | report only (MGD) | all year | 016 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 017 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 017 |
| Solids, total suspended | daily average | ≤ 35 mg/L | all year | 017 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 017 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 017 |
| Iron, total [as Fe] | daily average | ≤ 3.5 mg/L | all year | 017 |
| Iron, total [as Fe] | daily maximum | ≤ 7 mg/L | all year | 017 |
| Iron, dissolved [as Fe] | daily maximum | ≤ 1000 ug/L | all year | 017 |
| Manganese, dissolved [as Mn] | daily maximum | ≤ 1462 ug/L | all year | 017 |
| Duration | monthly total | report only (d/mo) | all year | 017 |
| Flow | monthly average | report only (MGD) | all year | 017 |
| Flow | instantaneous maximum | report only (MGD) | all year | 017 |
Cited limits by parameter: Wyoming's rules and the federal ones.
Same industry: the 15 Coal Mining permits in Wyoming.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/WY0028479 · MCP: https://passage-data.com/mcp