Clean Water Act discharge permit · NPDES COR420749

PENA STATION FILING 10, Denver, CO: NPDES COR420749 discharge permit, effluent exceedances, inspections, penalties

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

PENA STATION FILING 10, held by M.A. Mortenson Company, holds NPDES permit COR420749. EPA’s file records it issued July 11, 2023 and expiring March 31, 2024. 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 PENA STATION FILING 10: its NPDES ID, its permit type and status, its dates, its address in Denver, Colorado. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES COR420749.

Identity

Facility as filed	PENA STATION FILING 10
Permittee as filed	M.A. Mortenson Company
NPDES ID	COR420749
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
Issued	July 11, 2023
Expiration date	March 31, 2024
Issuing agency	STA
Address	Denver, CO 80202
Subwatershed	Second Creek (HUC 101900030403)

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 COR420749.

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 COR420749.

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, COR420749.

Start the watch

How we handle your data → Privacy

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 COR420749 there.

Nearby on the register

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

This public-records page covers Clean Water Act discharge permit NPDES COR420749 for PENA STATION FILING 10 in Denver, CO, held by M.A. Mortenson Company, which is administratively continued and classed as a Minor Discharger. The register lists 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, and no effluent or single-event violations are recorded for this permit. The permit was issued July 11, 2023 and expires March 31, 2024, in the Second Creek subwatershed (HUC 101900030403).