Clean Water Act discharge permit · NPDES MT0031828
WESTERN ENERGY ROSEBUD MINE AREA F, Colstrip, MT: NPDES MT0031828 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 22Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
WESTERN ENERGY ROSEBUD MINE AREA F, held by Westmoreland Rosebud Mining LLC, holds NPDES permit MT0031828, which discharges to East Fork Armells Creek. EPA’s file records it issued April 22, 2020 and expiring May 31, 2025. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | WESTERN ENERGY ROSEBUD MINE AREA F |
|---|---|
| Permittee as filed | Westmoreland Rosebud Mining LLC |
| NPDES ID | MT0031828 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | April 22, 2020 |
| Expiration date | May 31, 2025 |
| Address | Colstrip, MT 59323 |
| Receiving water | EAST FORK ARMELLS CREEK |
| Subwatershed | Robbie Creek (HUC 101000011101) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 22Pollutants on file
- 22Under a numeric limit
- 22With a violation of any kind
- 1With 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 |
|---|---|---|---|---|---|
| Solids, settleable | 110 | 2 | 2 | July 31, 2025 | 13,900% over the limit |
| pH | 324 | 4 | 0 | ||
| Oil & Grease | 271 | 4 | 0 | ||
| Flow rate | 270 | 4 | 0 | ||
| Conductivity | 270 | 4 | 0 | ||
| Iron, total [as Fe] | 270 | 4 | 0 | ||
| Phosphorus, total [as P] | 218 | 4 | 0 | ||
| Nitrogen, total [as N] | 216 | 4 | 0 | ||
| Nitrite + Nitrate total [as N] | 216 | 4 | 0 | ||
| Fluoride, total [as F] | 216 | 4 | 0 | ||
| Arsenic, total [as As] | 216 | 4 | 0 | ||
| Cadmium, total [as Cd] | 216 | 4 | 0 | ||
| Chromium, total [as Cr] | 216 | 4 | 0 | ||
| Copper, total [as Cu] | 216 | 4 | 0 | ||
| Nickel, total [as Ni] | 216 | 4 | 0 | ||
| Silver, total [as Ag] | 216 | 4 | 0 | ||
| Zinc, total [as Zn] | 216 | 4 | 0 | ||
| Aluminum, dissolved [as Al] | 216 | 4 | 0 | ||
| Selenium, total [as Se] | 216 | 4 | 0 | ||
| Solids, total dissolved | 216 | 4 | 0 | ||
| Mercury, total [as Hg] | 216 | 4 | 0 | ||
| Solids, total suspended | 108 | 4 | 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 MT0031828.
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.
Watch this permit
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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 MT0031828 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 September 15, 2026.