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Clean Water Act discharge permit · NPDES COR429413

TODD CREEK STREAM IMPROVEMENTS, Thornton, CO: NPDES COR429413 discharge permit, effluent exceedances, inspections, penalties

TODD CREEK STREAM IMPROVEMENTS, held by Naranjo Civil Constructors, Inc, holds NPDES permit COR429413. EPA’s file records it issued December 4, 2025 and expiring March 31, 2029. 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.

What the register holds for TODD CREEK STREAM IMPROVEMENTS: its NPDES ID, its permit type and status, its dates, its address in Thornton, Colorado. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES COR429413.

Identity

Facility as filedTODD CREEK STREAM IMPROVEMENTS
Permittee as filedNaranjo Civil Constructors, Inc
NPDES IDCOR429413
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedDecember 4, 2025
Expiration dateMarch 31, 2029
AddressThornton, CO 80602
SubwatershedTodd Creek-South Platte River (HUC 101900030405)

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 COR429413.

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 COR429413.

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 COR429413 there.

Nearby on the register

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

What this page shows

The TODD CREEK STREAM IMPROVEMENTS permit, held by Naranjo Civil Constructors, Inc in Thornton, Adams County, Colorado, is one of 463 general permit coverages in Adams County and one of 60 NPDES permits in the Todd Creek-South Platte River subwatershed. Of the 463 Adams County general permit coverages, 13.0% have a violation on file, while this permit has none of the pollutants under a numeric limit and none with an effluent exceedance. Issued December 4, 2025, the permit is effective and expires March 31, 2029, and 74.1% of the Adams County coverages carry an earlier issue date.