Clean Water Act discharge permit · NPDES COG081289
19TH ST & FOURMILE CANYON CREEK UNDERPASS, Boulder, CO: NPDES COG081289 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 13Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
19TH ST & FOURMILE CANYON CREEK UNDERPASS, held by Native Sun Construction, holds NPDES permit COG081289, which discharges to Fourmile Canyon Creek. EPA’s file records it issued August 11, 2025 and expiring May 31, 2028. 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 | 19TH ST & FOURMILE CANYON CREEK UNDERPASS |
|---|---|
| Permittee as filed | Native Sun Construction |
| NPDES ID | COG081289 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | August 11, 2025 |
| Expiration date | May 31, 2028 |
| Address | Boulder, CO 80304 |
| Receiving water | Fourmile Canyon Creek |
| Subwatershed | Fourmile Canyon Creek (HUC 101900050405) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 13Pollutants on file
- 13Under a numeric limit
- 13With 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 | 14 | 42 | 0 | ||
| Solids, total suspended | 14 | 42 | 0 | ||
| Flow, in conduit or thru treatment plant | 14 | 42 | 0 | ||
| Oil and grease | 7 | 21 | 0 | ||
| Flow, total | 7 | 21 | 0 | ||
| Duration of discharge | 7 | 21 | 0 | ||
| Oil and grease visual | 7 | 21 | 0 | ||
| Arsenic, total recoverable | 4 | 12 | 0 | ||
| Iron, total recoverable | 4 | 12 | 0 | ||
| Iron, dissolved [as Fe] | 4 | 12 | 0 | ||
| Manganese, dissolved [as Mn] | 4 | 12 | 0 | ||
| Selenium, potentially dissolvd | 4 | 12 | 0 | ||
| Uranium, total | 4 | 12 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES COG081289.
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 COG081289.
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, COG081289.
Start the watch
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- One watershed — $2,990/year
- One state — $4,990/year
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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 COG081289 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.