Clean Water Act discharge permit · NPDES MTR000058

ROSEBUD POWER PLANT, Colstrip, MT: NPDES MTR000058 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
1Pollutants under a numeric limit
0Pollutants with an effluent exceedance

ROSEBUD POWER PLANT, held by COLSTRIP ENERGY LIMITED PARTNERSHIP, holds NPDES permit MTR000058, which discharges to East Fork Armells Creek. EPA’s file records it issued June 1, 2018 and expiring January 31, 2023. 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
Permittee as filed	COLSTRIP ENERGY LIMITED PARTNERSHIP
NPDES ID	MTR000058
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Industrial stormwater
Issued	June 1, 2018
Expiration date	January 31, 2023
Address	Colstrip, MT 59323
Receiving water	EAST FORK ARMELLS CREEK
Receiving water impaired	303(D) Listed
Subwatershed	East Fork Armells Creek-Sevenmile Creek (HUC 101000011004)
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

1Pollutants on file
1Under a numeric limit
0With 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
Iron, total [as Fe]	3	0	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTR000058.

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

3Single-event violations

Date	What EPA recorded	Agency
January 11, 2023	WW Storm Water Non-Construction - Failure to properly install/implement BMPs	ST6
January 11, 2023	WW Storm Water Non-Construction - Failure to submit required report (non-DMR)	ST6
January 11, 2023	WW Storm Water Non-Construction - Failure to properly operate and maintain BMPs	ST6

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 MTR000058 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers Clean Water Act discharge permit NPDES MTR000058 for the ROSEBUD POWER PLANT in Colstrip, MT, which discharges to East Fork Armells Creek and is administratively continued. The page lists 1 pollutant under a numeric limit and 0 pollutants with an effluent exceedance, under a Minor Discharger class and an Industrial stormwater program. It also lists the permit's issue date of June 1, 2018 and expiration date of January 31, 2023, as they stood when the record was loaded on September 15, 2026.