Clean Water Act discharge permit · NPDES MTR111796
GAS TRANSMISSION: LEWISTOWN - REROUTE, Lewistown, MT: NPDES MTR111796 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
GAS TRANSMISSION: LEWISTOWN - REROUTE, held by NorthWestern Energy, holds NPDES permit MTR111796, which discharges to Casino Creek. EPA’s file records it issued May 22, 2026 and expiring December 31, 2027. 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.
What the register holds for GAS TRANSMISSION: LEWISTOWN - REROUTE: its NPDES ID, its permit type and status, its dates, its address in Lewistown, Montana, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTR111796.
Identity
| Facility as filed | GAS TRANSMISSION: LEWISTOWN - REROUTE |
|---|---|
| Permittee as filed | NorthWestern Energy |
| NPDES ID | MTR111796 |
| 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 22, 2026 |
| Expiration date | December 31, 2027 |
| Address | Lewistown, MT 59457 |
| Receiving water | CASINO CREEK |
| Subwatershed | Casino Creek (HUC 100401030704) |
Cited to the EPA ICIS-NPDES permit file (ECHO 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 MTR111796.
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 MTR111796.
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
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, MTR111796.
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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 MTR111796 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.