Clean Water Act discharge permit · NPDES MT0021229
ABSALOKA MINE, Hardin, MT: NPDES MT0021229 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 23Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
ABSALOKA MINE, held by Westmoreland Absaloka Mining LLC, holds NPDES permit MT0021229, which discharges to Sarpy Creek Drainage. EPA’s file records it issued August 31, 2015 and expiring September 30, 2020. 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 | ABSALOKA MINE |
|---|---|
| Permittee as filed | Westmoreland Absaloka Mining LLC |
| NPDES ID | MT0021229 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | August 31, 2015 |
| Expiration date | September 30, 2020 |
| Address | Hardin, MT 59034 |
| Receiving water | SARPY CREEK DRAINAGE |
| Subwatershed | Lower East Fork Sarpy Creek (HUC 101000010502) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 24Pollutants on file
- 23Under a numeric limit
- 22With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 20 | 34 | 2 | March 31, 2016 | 417% over the limit |
| pH | 60 | 81 | 1 | March 31, 2016 | |
| Iron, total [as Fe] | 40 | 53 | 0 | ||
| Oil and grease, hexane extr method | 30 | 40 | 0 | ||
| Nitrogen, total [as N] | 30 | 40 | 0 | ||
| Flow rate | 30 | 39 | 0 | ||
| Nitrite + Nitrate total [as N] | 30 | 39 | 0 | ||
| Arsenic, total [as As] | 30 | 39 | 0 | ||
| Cadmium, total [as Cd] | 30 | 39 | 0 | ||
| Phosphorus, total [as P] | 30 | 38 | 0 | ||
| Chloride [as Cl] | 30 | 38 | 0 | ||
| Chromium, total [as Cr] | 30 | 38 | 0 | ||
| Copper, total [as Cu] | 30 | 37 | 0 | ||
| Lead, total [as Pb] | 30 | 37 | 0 | ||
| Nickel, total [as Ni] | 30 | 37 | 0 | ||
| Zinc, total [as Zn] | 30 | 37 | 0 | ||
| Aluminum, dissolved [as Al] | 30 | 37 | 0 | ||
| Selenium, total [as Se] | 30 | 37 | 0 | ||
| Volume, total | 30 | 37 | 0 | ||
| Solids, total dissolved [TDS] | 30 | 37 | 0 | ||
| Solids, settleable | 10 | 11 | 0 | ||
| Discharge event observation [Visual Monitoring] | 0 | 1 | 0 | ||
| Pass/Fail Static 48Hr Acute Ceriodaphnia dubia | 1 | 0 | 0 | ||
| Pass/Fail Static 96 Hr Acute Pimephales Promelas | 1 | 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
- 8Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 24, 2022 | Effluent Violations - Narrative Effluent Violation | ST6 |
| March 24, 2022 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| March 24, 2022 | Monitoring Violations - No Flow Measurement Device | ST6 |
| November 30, 2021 | Monitoring Violations - No Flow Measurement Device | ST6 |
| November 30, 2021 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| November 30, 2021 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| November 30, 2021 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| November 30, 2021 | Monitoring Violations - Improper Analysis or Lab Error | 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.
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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 MT0021229 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.