Clean Water Act discharge permit · NPDES MTX000052
ROSEBUD POWER PLANT, COLSTRIP ENERGY LIMITED PARTNERSHIP, Colstrip, MT: NPDES MTX000052 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 44Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
ROSEBUD POWER PLANT, COLSTRIP ENERGY LIMITED PARTNERSHIP, held by COLSTRIP ENERGY LIMITED PARTNERSHIP, holds NPDES permit MTX000052, which discharges to Sunday Creek. EPA’s file records it issued August 25, 2011 and expiring September 30, 2016. 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 | ROSEBUD POWER PLANT, COLSTRIP ENERGY LIMITED PARTNERSHIP |
|---|---|
| Permittee as filed | COLSTRIP ENERGY LIMITED PARTNERSHIP |
| NPDES ID | MTX000052 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | State-issued individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | August 25, 2011 |
| Expiration date | September 30, 2016 |
| Issuing agency | MONTANA DEQ |
| Address | Colstrip, MT 59323 |
| Receiving water | SUNDAY CREEK |
| Subwatershed | Last Chance Gulch (HUC 100301011309) |
| Other EPA IDs (FRS) | RCRA handler MTR000004879; ICIS-AIR source MT0000003008700007 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 44Pollutants on file
- 44Under a numeric limit
- 1With a violation of any kind
- 0With 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 |
|---|---|---|---|---|---|
| Arsenic, dissolved [as As] | 6 | 1 | 0 | ||
| Specific conductance | 9 | 0 | 0 | ||
| Water level at sample collection time | 8 | 0 | 0 | ||
| Sulfate [as S] | 6 | 0 | 0 | ||
| pH | 6 | 0 | 0 | ||
| Alkalinity, total [as CaCO3] | 6 | 0 | 0 | ||
| Bicarbonate ion- [as HCO3] | 6 | 0 | 0 | ||
| Carbonate ion- [as CO3] | 6 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 6 | 0 | 0 | ||
| Calcium, total [as Ca] | 6 | 0 | 0 | ||
| Magnesium, total [as Mg] | 6 | 0 | 0 | ||
| Chloride [as Cl] | 6 | 0 | 0 | ||
| Silica, total [as SiO2] | 6 | 0 | 0 | ||
| Barium, dissolved [as Ba] | 6 | 0 | 0 | ||
| Iron, dissolved [as Fe] | 6 | 0 | 0 | ||
| Solids, total dissolved [TDS] | 6 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 5 | 0 | 0 | ||
| Cyanide, total [as CN] | 5 | 0 | 0 | ||
| Sodium, total [as Na] | 5 | 0 | 0 | ||
| Potassium, total [as K] | 5 | 0 | 0 | ||
| Fluoride, total [as F] | 5 | 0 | 0 | ||
| Beryllium, dissolved [as Be] | 5 | 0 | 0 | ||
| Boron, dissolved [as B] | 5 | 0 | 0 | ||
| Cadmium, dissolved [as Cd] | 5 | 0 | 0 | ||
| Chromium, dissolved [as Cr] | 5 | 0 | 0 | ||
| Copper, dissolved [as Cu] | 5 | 0 | 0 | ||
| Thallium, dissolved [as Tl] | 5 | 0 | 0 | ||
| Nickel, dissolved [as Ni] | 5 | 0 | 0 | ||
| Silver, dissolved [as Ag] | 5 | 0 | 0 | ||
| Strontium, dissolved | 5 | 0 | 0 | ||
| Antimony, dissolved [as Sb] | 5 | 0 | 0 | ||
| Aluminum, total [as Al] | 5 | 0 | 0 | ||
| Selenium, dissolved [as Se] | 5 | 0 | 0 | ||
| Titanium, dissolved [as Ti] | 5 | 0 | 0 | ||
| Mercury, dissolved [as Hg] | 5 | 0 | 0 | ||
| Zinc, dissolved [as Zn] | 4 | 0 | 0 | ||
| Fly ash | 2 | 0 | 0 | ||
| Report due [yrmoda] | 2 | 0 | 0 | ||
| Oil and grease, hexane extr method | 1 | 0 | 0 | ||
| Manganese, total [as Mn] | 1 | 0 | 0 | ||
| Strontium, total [as Sr] | 1 | 0 | 0 | ||
| Selenium, total [as Se] | 1 | 0 | 0 | ||
| Titanium, total [as Ti] | 1 | 0 | 0 | ||
| Mercury, total [as Hg] | 1 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTX000052.
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 MTX000052.
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 MTX000052 there.
Nearby on the register
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- Every permit record in Colstrip, A to Z
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- Every permit record in Montana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.