Clean Water Act discharge permit · NPDES CO0042447
RIFLE STATION, Garfield County, CO: NPDES CO0042447 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 24Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
RIFLE STATION, held by Tri-State Generation and Transmission Association Inc, holds NPDES permit CO0042447, which discharges to Dry Creek. EPA’s file records it issued September 18, 2012 and expiring October 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 | RIFLE STATION |
|---|---|
| Permittee as filed | Tri-State Generation and Transmission Association Inc |
| NPDES ID | CO0042447 |
| 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 | September 18, 2012 |
| Expiration date | October 31, 2017 |
| Address | Garfield County, CO 81650 |
| Receiving water | DRY CREEK |
| Subwatershed | Dry Creek-Colorado River (HUC 140100050604) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 27Pollutants on file
- 24Under a numeric limit
- 13With a violation of any kind
- 4With 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 |
|---|---|---|---|---|---|
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | 3 | 9 | 9 | March 31, 2022 | 99,999% over the limit |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 3 | 3 | June 30, 2004 | 99,999% over the limit |
| %Effect Static Renewal 7Day Chronic Pimephales promelas | 0 | 2 | 2 | June 30, 2009 | 75% over the limit |
| Solids, total suspended | 4 | 5 | 1 | July 31, 2013 | 4% over the limit |
| Oil and grease | 3 | 5 | 0 | ||
| Priority Pollutants | 2 | 4 | 0 | ||
| pH | 4 | 2 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 2 | 0 | ||
| Chromium, total [as Cr] | 2 | 2 | 0 | ||
| Zinc, total [as Zn] | 2 | 2 | 0 | ||
| Chlorine, free available | 2 | 2 | 0 | ||
| Nitrogen, ammonia total [as N] | 0 | 2 | 0 | ||
| Oil and grease visual | 2 | 1 | 0 | ||
| Static Renewal 7 Day Chronic Pimephales promelas | 3 | 0 | 0 | ||
| Iron, total recoverable | 2 | 0 | 0 | ||
| Copper, total [as Cu] | 2 | 0 | 0 | ||
| Chromium, hexavalent dissolved [as Cr] | 2 | 0 | 0 | ||
| Zinc, potentially dissolved | 2 | 0 | 0 | ||
| Silver, potentially dissolved | 2 | 0 | 0 | ||
| Copper, potentially dissolved | 2 | 0 | 0 | ||
| Manganese, potentially dissolvd | 2 | 0 | 0 | ||
| Selenium, potentially dissolvd | 2 | 0 | 0 | ||
| Chlorine, total residual | 2 | 0 | 0 | ||
| Solids, total dissolved | 2 | 0 | 0 | ||
| Iron, total [as Fe] | 2 | 0 | 0 | ||
| Arsenic, total recoverable | 1 | 0 | 0 | ||
| Mercury, total [as Hg] | 1 | 0 | 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
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 30, 2021 | Effluent Violations - Failed Toxicity Test | ST6 |
| October 1, 2019 | Effluent Violations - Failed Toxicity Test | ST6 |
| October 1, 2018 | Effluent Violations - Failed Toxicity Test | ST6 |
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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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 CO0042447 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.