Clean Water Act discharge permit · NPDES COR429883

DENVER BASIN WELL SITE, Lone Tree, CO: NPDES COR429883 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance

DENVER BASIN WELL SITE, held by HEI Civil, holds NPDES permit COR429883. EPA’s file records it issued January 30, 2026 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 DENVER BASIN WELL SITE: its NPDES ID, its permit type and status, its dates, its address in Lone Tree, Colorado. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES COR429883.

Identity

Facility as filed	DENVER BASIN WELL SITE
Permittee as filed	HEI Civil
NPDES ID	COR429883
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	January 30, 2026
Expiration date	March 31, 2029
Address	Lone Tree, CO 80134
Subwatershed	Happy Canyon Creek-Cherry Creek (HUC 101900030301)

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

Effluent limits and exceedances

0Pollutants on file
0Under a numeric limit
0With a violation of any kind
0With an effluent exceedance

EPA’s limits and effluent violation files hold no pollutant row for NPDES COR429883.

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 COR429883.

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 COR429883 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 COR429883 for the DENVER BASIN WELL SITE in Lone Tree, CO, held by HEI Civil, with a status of Effective, a minor discharger class, and coverage under a general permit. The page lists an issue date of January 30, 2026 and an expiration date of March 31, 2029, and reports 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance. It also shows no violations on file for the permit.