Clean Water Act discharge permit · NPDES COG502197

NIX SAND AND GRAVEL MINE, Weld County, CO: NPDES COG502197 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
6Pollutants under a numeric limit
0Pollutants with an effluent exceedance

NIX SAND AND GRAVEL MINE, held by Ready Mix Concrete Co LLC, holds NPDES permit COG502197, which discharges to Saint Vrain Creek. EPA’s file records it issued November 19, 2021 and expiring December 31, 2024. 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	NIX SAND AND GRAVEL MINE
Permittee as filed	Ready Mix Concrete Co LLC
NPDES ID	COG502197
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	November 19, 2021
Expiration date	December 31, 2024
Address	Weld County, CO 0000
Receiving water	Saint Vrain Creek
Subwatershed	Firestone Lake-Saint Vrain Creek (HUC 101900050707)

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

Effluent limits and exceedances

6Pollutants on file
6Under a numeric limit
6With 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	10	16
Solids, total suspended	10	16
Flow, in conduit or thru treatment plant	10	16
Conductivity	5	8
Oil and grease	5	8
Oil and grease visual	5	8

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES COG502197.

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 COG502197.

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 COG502197 there.

Nearby on the register

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

This public-records page covers the Clean Water Act discharge permit NPDES COG502197 for the NIX SAND AND GRAVEL MINE in Weld County, CO, held by Ready Mix Concrete Co LLC and discharging to Saint Vrain Creek, with the permit listed as administratively continued and a minor discharger class. The page lists 6 pollutants on file, 6 under a numeric limit, 0 with an effluent exceedance, and 6 with a violation.