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Clean Water Act discharge permit · NPDES COR426745

ARROWHEAD OPEN SPACE, Evans, CO: NPDES COR426745 discharge permit, effluent exceedances, inspections, penalties

ARROWHEAD OPEN SPACE, held by Tuston Construction, LLC, holds NPDES permit COR426745. 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 (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for ARROWHEAD OPEN SPACE: its NPDES ID, its permit type and status, its dates, its address in Evans, Colorado. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES COR426745.

Identity

Facility as filedARROWHEAD OPEN SPACE
Permittee as filedTuston Construction, LLC
NPDES IDCOR426745
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
AddressEvans, CO 80620
SubwatershedAshcroft Draw-South Platte River (HUC 101900030605)

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 COR426745.

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 COR426745.

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 COR426745 there.

Nearby on the register

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

What this page shows

The ARROWHEAD OPEN SPACE permit in Evans, Weld County, Colorado, is one of 596 general permit coverages in Weld County, and it sits among 30 NPDES permits in the Ashcroft Draw-South Platte River subwatershed, this one included. Of the 595 general permit coverages in Weld County, 56.1% were issued earlier than this one, and the permit records zero pollutants under a numeric limit and zero pollutants with an effluent exceedance.