Clean Water Act discharge permit · NPDES COR423866
DEN MAINTENANCE FACILITY, Denver, CO: NPDES COR423866 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
DEN MAINTENANCE FACILITY, held by Hensel Phelps, holds NPDES permit COR423866. EPA’s file records it issued June 18, 2024 and expiring March 31, 2029. 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.
What the register holds for DEN MAINTENANCE FACILITY: its NPDES ID, its permit type and status, its dates, its address in Denver, Colorado. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES COR423866.
Identity
| Facility as filed | DEN MAINTENANCE FACILITY |
|---|---|
| Permittee as filed | Hensel Phelps |
| NPDES ID | COR423866 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | June 18, 2024 |
| Expiration date | March 31, 2029 |
| Address | Denver, CO 80249 |
| Subwatershed | Third Creek (HUC 101900030404) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 0Pollutants on file
- 0Under a numeric limit
- 0With a violation of any kind
- 0With an effluent exceedance
EPA’s limits and effluent violation files hold no pollutant row for NPDES COR423866.
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 COR423866.
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 COR423866 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.