Clean Water Act discharge permit · NPDES MT0000892
DECKER COAL CO (WEST MINE), Decker, MT: NPDES MT0000892 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 47Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
DECKER COAL CO (WEST MINE), held by DECKER COAL COMPANY, holds NPDES permit MT0000892, which discharges to Tongue River Reservoir. EPA’s file records it issued September 28, 2006 and expiring October 31, 2011. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | DECKER COAL CO (WEST MINE) |
|---|---|
| Permittee as filed | DECKER COAL COMPANY |
| NPDES ID | MT0000892 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | September 28, 2006 |
| Expiration date | October 31, 2011 |
| Issuing agency | MONTANA DEQ |
| Address | Decker, MT 59025 |
| Receiving water | TONGUE RIVER RESERVOIR |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Tongue River-Pearson Creek (HUC 100901010501) |
| SIC | 1221 – Bituminous Coal And Lignite - Surface |
| Other EPA IDs (FRS) | RCRA handler MTD980718001 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 48Pollutants on file
- 47Under a numeric limit
- 33With a violation of any kind
- 5With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Specific conductance | 8 | 7 | 7 | February 28, 2007 | 20% over the limit |
| Solids, total suspended | 10 | 5 | 2 | June 30, 2001 | 149% over the limit |
| Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia | 1 | 3 | 1 | March 31, 2001 | |
| Sodium adsorption ratio | 8 | 2 | 1 | May 31, 2011 | 11% over the limit |
| Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas | 1 | 2 | 1 | September 30, 2005 | |
| Iron, total [as Fe] | 8 | 3 | 0 | ||
| Flow rate | 10 | 2 | 0 | ||
| pH | 10 | 2 | 0 | ||
| Oil and grease visual | 5 | 2 | 0 | ||
| Solids, settleable | 3 | 2 | 0 | ||
| Oil & Grease | 0 | 2 | 0 | ||
| Selenium, total recoverable | 9 | 1 | 0 | ||
| Lead, total recoverable | 9 | 1 | 0 | ||
| Copper, total recoverable | 9 | 1 | 0 | ||
| Solids, total dissolved | 4 | 1 | 0 | ||
| Boron, total recoverable | 3 | 1 | 0 | ||
| BOD, 5-day, 20 deg. C | 1 | 1 | 0 | ||
| Carbon, tot organic [TOC] | 1 | 1 | 0 | ||
| Cyanide, total [as CN] | 1 | 1 | 0 | ||
| Arsenic, total recoverable | 1 | 1 | 0 | ||
| Barium, total recoverable | 1 | 1 | 0 | ||
| Nickel, total recoverable | 1 | 1 | 0 | ||
| Strontium, total recoverable, ug/L | 1 | 1 | 0 | ||
| Zinc, total recoverable | 1 | 1 | 0 | ||
| Aluminum, dissolved [as Al] | 1 | 1 | 0 | ||
| Cadmium, total recoverable | 1 | 1 | 0 | ||
| Chromium, total recoverable | 1 | 1 | 0 | ||
| Antimony, total recoverable | 1 | 1 | 0 | ||
| Total phenols | 1 | 1 | 0 | ||
| Manganese, total recoverable | 1 | 1 | 0 | ||
| Petrol hydrocarbons, total recoverable | 1 | 1 | 0 | ||
| Mercury, total recoverable | 1 | 1 | 0 | ||
| Chemical Oxygen Demand [COD] | 1 | 1 | 0 | ||
| Sulfate, total [as SO4] | 6 | 0 | 0 | ||
| Oil and grease, hexane extr method | 5 | 0 | 0 | ||
| Magnesium, total recoverable | 5 | 0 | 0 | ||
| Sodium, total recoverable | 5 | 0 | 0 | ||
| Temperature, water deg. fahrenheit | 3 | 0 | 0 | ||
| Nitrogen, total [as N] | 3 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 3 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 3 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 3 | 0 | 0 | ||
| Phosphorus, total [as P] | 3 | 0 | 0 | ||
| Fluoride, total [as F] | 3 | 0 | 0 | ||
| Beryllium, total recoverable [as Be] | 3 | 0 | 0 | ||
| Iron, total recoverable | 2 | 0 | 0 | ||
| Calcium, total recoverable | 1 | 0 | 0 | ||
| Solids, total dissolved [TDS] | 1 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MT0000892.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MT0000892 there.
Nearby on the register
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- Every permit record in Montana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.