Clean Water Act discharge permit · NPDES COG317189

AURORA ARV, PRV, AND LARGE VALVE REPLACEMENT, Aurora, CO: NPDES COG317189 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
13Pollutants under a numeric limit
0Pollutants with an effluent exceedance

AURORA ARV, PRV, AND LARGE VALVE REPLACEMENT, held by American West Construction LLC, holds NPDES permit COG317189, which discharges to Toll Gate Creek - Sand Creek. EPA’s file records it issued January 27, 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	AURORA ARV, PRV, AND LARGE VALVE REPLACEMENT
Permittee as filed	American West Construction LLC
NPDES ID	COG317189
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	January 27, 2025
Expiration date	May 31, 2028
Address	Aurora, CO 80013
Receiving water	Toll Gate Creek - Sand Creek
Subwatershed	Sand Creek (HUC 101900030204)

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
pH	8	8
Solids, total suspended	8	8
Lead, potentially dissolvd	8	8
Flow, in conduit or thru treatment plant	8	8
Chlorine, total residual	8	8
Phosphorus, total [as P]	4	4
Iron, total recoverable	4	4
Oil and grease	4	4
Flow, total	4	4
Oil and grease visual	4	4
Zinc, potentially dissolved	2	2
Copper, potentially dissolved	2	2
Arsenic, total recoverable	1	1

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES COG317189.

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 COG317189.

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 COG317189 there.

Nearby on the register

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

This public-records page covers NPDES permit COG317189, held by American West Construction LLC for the AURORA ARV, PRV, AND LARGE VALVE REPLACEMENT facility in Aurora, CO, which discharges to Toll Gate Creek - Sand Creek in the Sand Creek subwatershed (HUC 101900030204). The permit status is listed as Effective, with a Minor discharger class, and EPA's file records issuance on January 27, 2025 and expiration on May 31, 2028, as of September 15, 2026. The page lists 13 pollutants on file, 13 under a numeric limit, 13 with a violation of any kind, and 0 with an effluent exceedance.