Clean Water Act discharge permit · NPDES CO0023876
ARAPAHOE BASIN SKI AREA, Dillon, CO: NPDES CO0023876 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 13Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
ARAPAHOE BASIN SKI AREA, held by Dundee Realty USA LLC, holds NPDES permit CO0023876, which discharges to North Fork Of Snake River. EPA’s file records it issued March 27, 2006 and expiring March 31, 2011. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | ARAPAHOE BASIN SKI AREA |
|---|---|
| Permittee as filed | Dundee Realty USA LLC |
| NPDES ID | CO0023876 |
| 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 | March 27, 2006 |
| Expiration date | March 31, 2011 |
| Address | Dillon, CO 80435 |
| Receiving water | NORTH FORK OF SNAKE RIVER |
| Subwatershed | North Fork Snake River (HUC 140100020201) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 15Pollutants on file
- 13Under a numeric limit
- 15With 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 |
|---|---|---|---|---|---|
| Phosphorus, total [as P] | 8 | 9 | 2 | December 31, 2025 | 136% over the limit |
| pH | 4 | 6 | 2 | November 30, 2020 | |
| Nitrogen, ammonia total [as N] | 72 | 6 | 1 | January 31, 2023 | 97% over the limit |
| BOD, 5-day, 20 deg. C | 8 | 12 | 0 | ||
| Solids, total suspended | 6 | 8 | 0 | ||
| Flow, in conduit or thru treatment plant | 6 | 8 | 0 | ||
| Solids, total dissolved | 8 | 4 | 0 | ||
| Coliform, fecal general | 6 | 2 | 0 | ||
| Chlorine, total residual | 5 | 2 | 0 | ||
| Oil and grease | 2 | 2 | 0 | ||
| BOD, 5-day, percent removal | 2 | 2 | 0 | ||
| Solids, suspended percent removal | 2 | 2 | 0 | ||
| Oil and grease visual | 2 | 2 | 0 | ||
| E. coli | 0 | 2 | 0 | ||
| Plant capacity fact. percent of capacity | 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 CO0023876.
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 CO0023876 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.