Clean Water Act discharge permit · NPDES CO0000132
SANBORN CRK & ELK CRK MINES, Somerset, CO: NPDES CO0000132 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
SANBORN CRK & ELK CRK MINES, held by Oxbow Mining LLC, holds NPDES permit CO0000132, which discharges to Hubbard/Bear/Elk Cr, N Fork-Gunnisn. EPA’s file records it issued April 28, 2004 and expiring May 31, 2009. 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 | SANBORN CRK & ELK CRK MINES |
|---|---|
| Permittee as filed | Oxbow Mining LLC |
| NPDES ID | CO0000132 |
| 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 | April 28, 2004 |
| Expiration date | May 31, 2009 |
| Address | Somerset, CO 81434 |
| Receiving water | HUBBARD/BEAR/ELK CR, N FORK-GUNNISN |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Mesa Creek-Gunnison River (HUC 140200021005) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 14Pollutants on file
- 9Under a numeric limit
- 14With a violation of any kind
- 3With 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 | 41 | 13 | October 31, 2011 | 1,329% over the limit |
| Iron, total [as Fe] | 20 | 28 | 2 | December 31, 2010 | 40% over the limit |
| pH | 20 | 29 | 1 | March 31, 2002 | |
| Flow, in conduit or thru treatment plant | 20 | 28 | 0 | ||
| Solids, total dissolved | 20 | 24 | 0 | ||
| Oil and grease | 10 | 15 | 0 | ||
| Oil and grease visual | 10 | 15 | 0 | ||
| Solids, settleable | 18 | 13 | 0 | ||
| Iron, total recoverable | 0 | 4 | 0 | ||
| LC50 Static Renewal 96Hr Acute Pimephales promelas | 1 | 2 | 0 | ||
| Chlorine, total residual | 0 | 2 | 0 | ||
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | 0 | 2 | 0 | ||
| %Effect Static Renewal 7Day Chronic Pimephales promelas | 0 | 2 | 0 | ||
| LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | 0 | 1 | 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 CO0000132.
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 CO0000132 there.
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- Every permit record in Colorado, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.