Clean Water Act discharge permit · NPDES COR080016

LONE TREE MS4, Lone Tree, CO: NPDES COR080016 discharge permit, effluent exceedances, inspections, penalties

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

LONE TREE MS4, held by Lone Tree City of, holds NPDES permit COR080016, which discharges to Cook Creek To Willow Creek. EPA’s file records it issued March 8, 2008 and expiring March 9, 2013. 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 LONE TREE MS4: its NPDES ID, its permit type and status, its dates, its address in Lone Tree, Colorado, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES COR080016.

Identity

Facility as filed	LONE TREE MS4
Permittee as filed	Lone Tree City of
NPDES ID	COR080016
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Small municipal storm sewer systems
Issued	March 8, 2008
Expiration date	March 9, 2013
Address	Lone Tree, CO 80125
Receiving water	Cook Creek to Willow Creek
Subwatershed	Little Dry Creek (HUC 101900020903)
SIC	9511 – Air, Water, & Solid Waste Management

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

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 COR080016.

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 COR080016.

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.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, COR080016.

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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 COR080016 there.

Nearby on the register

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

The LONE TREE MS4 permit, held by Lone Tree City of, is one of 11 Storm Water Small MS4s permits in Douglas County, Colorado, on EPA's NPDES register. It sits among 58 NPDES permits in the Little Dry Creek subwatershed, and none of the 11 county permits in its program show a violation on file (0.0%). This permit records zero pollutants under a numeric limit and zero pollutants with an effluent exceedance.