Clean Water Act discharge permit · NPDES MTR111347
COLSTRIP POWER PLANT, Colstrip, MT: NPDES MTR111347 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
COLSTRIP POWER PLANT, held by TALEN MONTANA LLC, holds NPDES permit MTR111347, which discharges to East Fork Armells Creek. EPA’s file records it issued May 21, 2025 and expiring December 31, 2027. 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.
What the register holds for COLSTRIP POWER PLANT: its NPDES ID, its permit type and status, its dates, its address in Colstrip, Montana, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTR111347.
Identity
| Facility as filed | COLSTRIP POWER PLANT |
|---|---|
| Permittee as filed | TALEN MONTANA LLC |
| NPDES ID | MTR111347 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Construction stormwater |
| Issued | May 21, 2025 |
| Expiration date | December 31, 2027 |
| Address | Colstrip, MT 59323 |
| Receiving water | EAST FORK ARMELLS CREEK |
| Subwatershed | Headwaters East Fork Armells Creek (HUC 101000011001) |
| SIC | 1629 – Heavy Construction |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 0Pollutants on file
- 0Under a numeric limit
- 0With a violation of any kind
- 0With an effluent exceedance
EPA’s limits and effluent violation files hold no pollutant row for NPDES MTR111347.
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 MTR111347.
Inspections
EPA’s inspection file holds no inspection for NPDES MTR111347.
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES MTR111347.
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
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MTR111347.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 MTR111347 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.