Clean Water Act discharge permit · NPDES MTG071448
ROCKY MOUNTAIN FLATS, Bozeman, MT: NPDES MTG071448 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 6Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
ROCKY MOUNTAIN FLATS, held by WILLIAMS CIVIL CONSTRUCTION INC, holds NPDES permit MTG071448, which discharges to Baxter Creek. EPA’s file records it issued June 10, 2026 and expiring April 30, 2030. 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 ROCKY MOUNTAIN FLATS: its NPDES ID, its permit type and status, its dates, its address in Bozeman, Montana, its receiving water, and 6 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTG071448.
Identity
| Facility as filed | ROCKY MOUNTAIN FLATS |
|---|---|
| Permittee as filed | WILLIAMS CIVIL CONSTRUCTION INC |
| NPDES ID | MTG071448 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | June 10, 2026 |
| Expiration date | April 30, 2030 |
| Address | Bozeman, MT 59718 |
| Receiving water | BAXTER CREEK |
| Subwatershed | Lower Hyalite Creek (HUC 100200081002) |
| SIC | 1522 – Residential 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
- 6Pollutants on file
- 6Under 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 |
|---|---|---|---|---|---|
| Turbidity | 2 | 0 | 0 | ||
| Oil & Grease | 1 | 0 | 0 | ||
| Duration | 1 | 0 | 0 | ||
| Flowing, Receiving Stream | 1 | 0 | 0 | ||
| Oil and grease visual | 1 | 0 | 0 | ||
| Outfall observation,visual, y/n response | 1 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTG071448.
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 MTG071448.
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, MTG071448.
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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 MTG071448 there.
Nearby on the register
- Discharge permits in Bozeman
- Every permit record in Bozeman, A to Z
- Discharge permits in Montana
- Every permit record in Montana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.