Clean Water Act discharge permit · NPDES MTG490006
SINDELAR PIT, Billings, MT: NPDES MTG490006 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 4Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
SINDELAR PIT, held by KNIFE RIVER - BILLINGS, holds NPDES permit MTG490006, which discharges to Yellowstone River. EPA’s file records it issued December 4, 2019 and expiring October 31, 2024. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | SINDELAR PIT |
|---|---|
| Permittee as filed | KNIFE RIVER - BILLINGS |
| NPDES ID | MTG490006 |
| 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 |
| Issued | December 4, 2019 |
| Expiration date | October 31, 2024 |
| Address | Billings, MT 59105 |
| Receiving water | YELLOWSTONE RIVER |
| Subwatershed | Yellowstone River-Sevenmile Creek (HUC 100700070403) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 8Pollutants on file
- 4Under a numeric limit
- 7With a violation of any kind
- 2With 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 | 0 | 207 | 3 | July 31, 2006 | |
| pH | 6 | 56 | 1 | May 31, 2003 | |
| Flow rate | 0 | 35 | 0 | ||
| Oil and grease, hexane extr method | 3 | 27 | 0 | ||
| Oil and grease visual | 3 | 24 | 0 | ||
| Flow rate | 0 | 20 | 0 | ||
| Duration of discharge | 0 | 16 | 0 | ||
| Solids, total suspended | 6 | 0 | 0 |
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 MTG490006.
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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, MTG490006.
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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 MTG490006 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.