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Clean Water Act discharge permit · NPDES COR426747

SH 93 & SH 72 ROADWAY WIDENING, Arvada, CO: NPDES COR426747 discharge permit, effluent exceedances, inspections, penalties

SH 93 & SH 72 ROADWAY WIDENING, held by Castle Rock Construction Company of Colorado, LLC, holds NPDES permit COR426747. EPA’s file records it issued February 28, 2025 and expiring March 31, 2029. 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 SH 93 & SH 72 ROADWAY WIDENING: its NPDES ID, its permit type and status, its dates, its address in Arvada, Colorado. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES COR426747.

Identity

Facility as filedSH 93 & SH 72 ROADWAY WIDENING
Permittee as filedCastle Rock Construction Company of Colorado, LLC
NPDES IDCOR426747
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedFebruary 28, 2025
Expiration dateMarch 31, 2029
AddressArvada, CO 80007
SubwatershedLower Ralston Creek (HUC 101900040304)

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

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES COR426747.

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 COR426747.

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 COR426747 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 NPDES permit COR426747 for the SH 93 & SH 72 Roadway Widening in Arvada, Colorado, held by Castle Rock Construction Company of Colorado, LLC, with a status of Effective and a minor discharger class. The page lists 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, and the permit was issued February 28, 2025 and expires March 31, 2029.