Clean Water Act discharge permit · NPDES COR040289
OURAY SILVER MINE, Ouray, CO: NPDES COR040289 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 18Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
OURAY SILVER MINE, held by Thorin Resources LLC, holds NPDES permit COR040289, which discharges to Sneffels Creek - Uncompaghre River. EPA’s file records it issued July 20, 2016 and expiring July 31, 2021. 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.
Identity
| Facility as filed | OURAY SILVER MINE |
|---|---|
| Permittee as filed | Thorin Resources LLC |
| NPDES ID | COR040289 |
| 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 | July 20, 2016 |
| Expiration date | July 31, 2021 |
| Address | Ouray, CO 81427 |
| Receiving water | Sneffels Creek - Uncompaghre River |
| Subwatershed | Canyon Creek (HUC 140200060202) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 18Pollutants on file
- 18Under a numeric limit
- 18With 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 |
|---|---|---|---|---|---|
| pH | 2 | 24 | 0 | ||
| Zinc, potentially dissolved | 2 | 24 | 0 | ||
| Cadmium, potentially dissolvd | 2 | 24 | 0 | ||
| Turbidity | 1 | 12 | 0 | ||
| Solids, total suspended | 1 | 12 | 0 | ||
| Arsenic, total [as As] | 1 | 12 | 0 | ||
| Beryllium, total [as Be] | 1 | 12 | 0 | ||
| Cadmium, total [as Cd] | 1 | 12 | 0 | ||
| Copper, total [as Cu] | 1 | 12 | 0 | ||
| Iron, total [as Fe] | 1 | 12 | 0 | ||
| Iron, dissolved [as Fe] | 1 | 12 | 0 | ||
| Lead, total [as Pb] | 1 | 12 | 0 | ||
| Nickel, total [as Ni] | 1 | 12 | 0 | ||
| Silver, total [as Ag] | 1 | 12 | 0 | ||
| Zinc, total [as Zn] | 1 | 12 | 0 | ||
| Antimony, total [as Sb] | 1 | 12 | 0 | ||
| Selenium, total [as Se] | 1 | 12 | 0 | ||
| Mercury, total [as Hg] | 1 | 12 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES COR040289.
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 COR040289.
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 COR040289 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.