Clean Water Act discharge permit · NPDES COG850054
18 LEFT (18LT) SEDIMENTATION POND - FOIDEL CREEK MINE, Routt County, CO: NPDES COG850054 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 6Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
18 LEFT (18LT) SEDIMENTATION POND - FOIDEL CREEK MINE, held by Twenty Mile Coal LLC, holds NPDES permit COG850054, which discharges to Fish Creek. EPA’s file records it issued April 15, 2010 and expiring June 30, 2013. 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 | 18 LEFT (18LT) SEDIMENTATION POND - FOIDEL CREEK MINE |
|---|---|
| Permittee as filed | Twenty Mile Coal LLC |
| NPDES ID | COG850054 |
| 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 | April 15, 2010 |
| Expiration date | June 30, 2013 |
| Address | Routt County, CO 80467 |
| Receiving water | Fish Creek |
| Subwatershed | Outlet Fish Creek (HUC 140500010504) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 6Pollutants on file
- 6Under a numeric limit
- 6With 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 | 2 | 0 | ||
| Solids, settleable | 2 | 2 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 2 | 0 | ||
| Solids, total dissolved | 2 | 2 | 0 | ||
| Oil and grease | 1 | 1 | 0 | ||
| Oil and grease visual | 1 | 1 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES COG850054.
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 COG850054.
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
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, COG850054.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 COG850054 there.
Nearby on the register
- Discharge permits in Routt County
- Every permit record in Routt County, A to Z
- Discharge permits in Colorado
- Every permit record in Colorado, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.