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Clean Water Act discharge permit · NPDES COR900250

ESTES PARK READY MIX, Estes Park, CO: NPDES COR900250 discharge permit, effluent exceedances, inspections, penalties

ESTES PARK READY MIX, held by Smyrna Ready Mix Concrete LLC, holds NPDES permit COR900250, which discharges to Big Thompson River - South Platte River. EPA’s file records it issued June 19, 2012 and expiring June 30, 2017. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for ESTES PARK READY MIX: its NPDES ID, its permit type and status, its dates, its address in Estes Park, Colorado, its receiving water, and 2 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES COR900250.

Identity

Facility as filedESTES PARK READY MIX
Permittee as filedSmyrna Ready Mix Concrete LLC
NPDES IDCOR900250
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramIndustrial stormwater
IssuedJune 19, 2012
Expiration dateJune 30, 2017
AddressEstes Park, CO 80517
Receiving waterBig Thompson River - South Platte River
SubwatershedLake Estes-Big Thompson River (HUC 101900060207)
SIC3273 – Ready-Mixed Concrete

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

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 measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Solids, total suspended100
Iron, total [as Fe]100

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES COR900250.

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES COR900250.

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 COR900250 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

What this page shows

This public-records page covers the NPDES COR900250 discharge permit held by Smyrna Ready Mix Concrete LLC for ESTES PARK READY MIX in Estes Park, CO, which discharges to the Big Thompson River - South Platte River. The register lists 0 pollutants with an effluent exceedance and 2 pollutants under a numeric limit, with the permit shown as administratively continued and classed as a Minor Discharger.