Clean Water Act discharge permit · NPDES CO0034665
FOUR CORNERS MATERIALS, Bayfield, CO: NPDES CO0034665 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
FOUR CORNERS MATERIALS, held by FOUR CORNER MATERIALS, holds NPDES permit CO0034665, which discharges to Pine River. EPA’s file records it issued January 23, 2013 and expiring December 31, 2017. 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 | FOUR CORNERS MATERIALS |
|---|---|
| Permittee as filed | FOUR CORNER MATERIALS |
| NPDES ID | CO0034665 |
| 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 |
| Program | Industrial stormwater |
| Issued | January 23, 2013 |
| Expiration date | December 31, 2017 |
| Address | Bayfield, CO 81122 |
| Receiving water | PINE RIVER |
| Subwatershed | Texas Creek-Los Pinos River (HUC 140801011403) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 16Pollutants on file
- 9Under a numeric limit
- 16With 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 |
|---|---|---|---|---|---|
| Aluminum, total recoverable | 2 | 44 | 7 | July 31, 2021 | 744% over the limit |
| Solids, total suspended | 2 | 70 | 6 | July 31, 2021 | 98% over the limit |
| E. coli | 0 | 4 | 1 | August 31, 2020 | 9% over the limit |
| Solids, total dissolved | 2 | 64 | 0 | ||
| pH | 2 | 62 | 0 | ||
| Flow, in conduit or thru treatment plant | 0 | 50 | 0 | ||
| Floating solids, waste or visible foam-visual | 1 | 41 | 0 | ||
| Oil and grease visual | 1 | 37 | 0 | ||
| Oil & Grease | 1 | 35 | 0 | ||
| Flow, total | 2 | 18 | 0 | ||
| Metals, total | 0 | 13 | 0 | ||
| Oxygen, dissolved [DO] | 0 | 10 | 0 | ||
| Coliform, fecal general | 1 | 8 | 0 | ||
| Alkalinity, total [as CaCO3] | 0 | 6 | 0 | ||
| Aluminum, total [as Al] | 0 | 6 | 0 | ||
| Chemical oxygen demand [COD] | 0 | 6 | 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 CO0034665.
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, CO0034665.
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 CO0034665 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.