Clean Water Act discharge permit · NPDES COG840002
GREENBACK SCHAEFFER RANCH, Garfield County, CO: NPDES COG840002 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 57Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
GREENBACK SCHAEFFER RANCH, held by NEXO Merchant Plant 1 LLC, holds NPDES permit COG840002, which discharges to Unnamed Tributary Of West Mamm Creek. EPA’s file records it issued April 1, 2011 and expiring August 31, 2014. 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 | GREENBACK SCHAEFFER RANCH |
|---|---|
| Permittee as filed | NEXO Merchant Plant 1 LLC |
| NPDES ID | COG840002 |
| 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 1, 2011 |
| Expiration date | August 31, 2014 |
| Address | Garfield County, CO |
| Receiving water | Unnamed Tributary of West Mamm Creek |
| Subwatershed | Beaver Creek-Colorado River (HUC 140100050701) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 57Pollutants on file
- 57Under a numeric limit
- 57With a violation of any kind
- 10With 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 |
|---|---|---|---|---|---|
| Cadmium, potentially dissolvd | 6 | 276 | 4 | July 31, 2013 | 931% over the limit |
| Silver, potentially dissolved | 3 | 274 | 4 | July 31, 2013 | 1,329% over the limit |
| Selenium, potentially dissolvd | 3 | 274 | 4 | July 31, 2013 | 987% over the limit |
| Mercury, total [as Hg] | 3 | 186 | 4 | October 31, 2013 | 900% over the limit |
| Lead, potentially dissolvd | 3 | 272 | 2 | July 31, 2013 | 517% over the limit |
| pH | 2 | 188 | 2 | September 30, 2013 | |
| Chloride [as Cl] | 3 | 278 | 1 | October 31, 2013 | 50% over the limit |
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | 3 | 94 | 1 | December 31, 2013 | 80% over the limit |
| Static Renewal 7 Day Chronic Pimephales promelas | 3 | 94 | 1 | December 31, 2013 | 60% over the limit |
| Oil and grease | 1 | 94 | 1 | November 30, 2013 | 26% over the limit |
| Aluminum, total recoverable | 6 | 272 | 0 | ||
| Chromium, hexavalent dissolved [as Cr] | 6 | 272 | 0 | ||
| Sodium Absorption Ratio | 3 | 272 | 0 | ||
| Beryllium, total recoverable [as Be] | 3 | 270 | 0 | ||
| Zinc, potentially dissolved | 3 | 270 | 0 | ||
| Copper, potentially dissolved | 3 | 270 | 0 | ||
| Manganese, potentially dissolvd | 3 | 270 | 0 | ||
| Nickel, potentially dissolvd | 3 | 270 | 0 | ||
| Uranium, potentially dissolvd | 3 | 270 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 186 | 0 | ||
| Solids, total dissolved | 3 | 185 | 0 | ||
| Solids, total suspended | 2 | 185 | 0 | ||
| Toluene | 4 | 184 | 0 | ||
| Benzene | 4 | 184 | 0 | ||
| Ethylbenzene | 4 | 184 | 0 | ||
| Temperature, water deg. centigrade | 2 | 184 | 0 | ||
| Iron, total recoverable | 5 | 182 | 0 | ||
| Arsenic, potentially dissolved | 5 | 182 | 0 | ||
| Chromium, trivalent total recoverable | 5 | 182 | 0 | ||
| Antimony, dissolved [as Sb] | 4 | 182 | 0 | ||
| Barium, potentially dissolvd | 4 | 182 | 0 | ||
| Arsenic, total recoverable | 2 | 180 | 0 | ||
| Thallium, potentially dissolvd | 2 | 180 | 0 | ||
| Xylene [mix of m+o+p] | 3 | 97 | 0 | ||
| Oil and grease visual | 1 | 94 | 0 | ||
| Radium 226 + radium 228, total | 5 | 93 | 0 | ||
| Conductivity | 1 | 90 | 0 | ||
| Bicarbonate ion- [as HCO3] | 1 | 90 | 0 | ||
| Calcium, total recoverable | 1 | 90 | 0 | ||
| Magnesium, total recoverable | 1 | 90 | 0 | ||
| Sodium, total recoverable | 1 | 89 | 0 | ||
| Priority Pollutants | 2 | 62 | 0 | ||
| Sulfate | 2 | 6 | 0 | ||
| Priority Pollutant Results | 4 | 4 | 0 | ||
| Copper, dissolved [as Cu] | 3 | 2 | 0 | ||
| Lead, dissolved [as Pb] | 3 | 2 | 0 | ||
| Manganese, dissolved [as Mn] | 3 | 2 | 0 | ||
| Thallium, dissolved [as Tl] | 3 | 2 | 0 | ||
| Nickel, dissolved [as Ni] | 3 | 2 | 0 | ||
| Silver, dissolved [as Ag] | 3 | 2 | 0 | ||
| Zinc, dissolved [as Zn] | 3 | 2 | 0 | ||
| Selenium, dissolved [as Se] | 3 | 2 | 0 | ||
| Beryllium, potentially dissolvd | 3 | 2 | 0 | ||
| Uranium, dissolved | 3 | 2 | 0 | ||
| Iron, dissolved [as Fe] | 2 | 2 | 0 | ||
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 2 | 0 | ||
| %Effect Static Renewal 7Day Chronic Pimephales promelas | 2 | 2 | 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 COG840002.
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.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.