Clean Water Act discharge permit · NPDES COR901601

AMERICAN ROCKY MOUNTAINEER 36 ST YARD, Denver, CO: NPDES COR901601 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
1Pollutants under a numeric limit
0Pollutants with an effluent exceedance

AMERICAN ROCKY MOUNTAINEER 36 ST YARD, held by American Rocky Mountaineer LLC, holds NPDES permit COR901601, which discharges to South Platte River. EPA’s file records it issued January 21, 2022 and expiring December 31, 2025. 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	AMERICAN ROCKY MOUNTAINEER 36 ST YARD
Permittee as filed	American Rocky Mountaineer LLC
NPDES ID	COR901601
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Industrial stormwater
Issued	January 21, 2022
Expiration date	December 31, 2025
Address	Denver, CO 80216
Receiving water	South Platte River
Receiving water impaired	303(D) Listed
Subwatershed	Cherry Creek-South Platte River (HUC 101900030304)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

2Pollutants on file
1Under a numeric limit
2With 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
Arsenic, potentially dissolved	1	7	0
Arsenic, total recoverable	0	4	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES COR901601.

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 COR901601.

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 COR901601 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers NPDES permit COR901601 for AMERICAN ROCKY MOUNTAINEER 36 ST YARD in Denver, CO, held by American Rocky Mountaineer LLC, which discharges to the South Platte River and falls under the industrial stormwater program. The permit is listed as Effective with a Minor discharger class, shows 2 pollutants on file, 1 under a numeric limit and 0 with an effluent exceedance, and carries an issue date of January 21, 2022 and an expiration date of December 31, 2025.