Clean Water Act discharge permit · NPDES COR040284
MT. EMMONS PROJECT, Crested Butte, CO: NPDES COR040284 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 19Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
MT. EMMONS PROJECT, held by Mt Emmons Mining Co, holds NPDES permit COR040284, which discharges to Coal Creek To Slate River. EPA’s file records it issued February 16, 2016 and expiring January 31, 2021. 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 | MT. EMMONS PROJECT |
|---|---|
| Permittee as filed | Mt Emmons Mining Co |
| NPDES ID | COR040284 |
| 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 |
| Program | Industrial stormwater |
| Issued | February 16, 2016 |
| Expiration date | January 31, 2021 |
| Address | Crested Butte, CO 81224 |
| Receiving water | Coal Creek to Slate River |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Coal Creek (HUC 140200010204) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 19Pollutants on file
- 19Under a numeric limit
- 19With 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 |
|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | 24 | 80 | 0 | ||
| pH | 24 | 52 | 0 | ||
| Iron, total recoverable | 24 | 52 | 0 | ||
| Sulfide-hydrogen sulfide [undissociated] | 24 | 52 | 0 | ||
| Mercury, total [as Hg] | 24 | 52 | 0 | ||
| Hardness, total [as CaCO3] | 24 | 50 | 0 | ||
| Arsenic, total recoverable | 24 | 50 | 0 | ||
| Iron, dissolved [as Fe] | 24 | 50 | 0 | ||
| Aluminum, total recoverable | 24 | 50 | 0 | ||
| Molybdenum, total recoverable | 24 | 50 | 0 | ||
| Zinc, potentially dissolved | 24 | 50 | 0 | ||
| Copper, potentially dissolved | 24 | 50 | 0 | ||
| Cadmium, potentially dissolvd | 24 | 50 | 0 | ||
| Lead, potentially dissolvd | 24 | 50 | 0 | ||
| Manganese, potentially dissolvd | 24 | 50 | 0 | ||
| Uranium, potentially dissolvd | 24 | 50 | 0 | ||
| Solids, total dissolved | 24 | 50 | 0 | ||
| Sulfate | 24 | 50 | 0 | ||
| Radium 226 + radium 228, total | 4 | 8 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES COR040284.
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 COR040284.
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
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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 COR040284 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.