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Clean Water Act discharge permit · NPDES COR420389

CITADEL SUBSTATION, Castle Rock, CO: NPDES COR420389 discharge permit, effluent exceedances, inspections, penalties

CITADEL SUBSTATION, held by CORE Electric Cooperative, holds NPDES permit COR420389. EPA’s file records it issued May 22, 2023 and expiring March 31, 2024. 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 CITADEL SUBSTATION: its NPDES ID, its permit type and status, its dates, its address in Castle Rock, Colorado. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES COR420389.

Identity

Facility as filedCITADEL SUBSTATION
Permittee as filedCORE Electric Cooperative
NPDES IDCOR420389
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedMay 22, 2023
Expiration dateMarch 31, 2024
Issuing agencySTA
AddressCastle Rock, CO 80109
SubwatershedMiddle East Plum Creek (HUC 101900020503)
SIC4931 – Electric And Other Services Combined

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

EPA’s limits and effluent violation files hold no pollutant row for NPDES COR420389.

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 COR420389.

Inspections

EPA’s inspection file holds no inspection for NPDES COR420389.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES COR420389.

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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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 COR420389 there.

CITADEL SUBSTATION, Castle Rock, Colorado: Coverage under a general permit COR420389, held by CORE Electric Cooperative; Administratively continued (past its expiration date and still in force until reissued); issued May 22, 2023, term to March 31, 2024, by STA.

Other permits held by CORE Electric Cooperative

CITADEL SUBSTATION among its neighbors

EPA’s permit file holds 30 discharge permits in the Middle East Plum Creek subwatershed (HUC 101900020503), COR420389 among them. Its county holds 347, 5 of them major permits; COR420389 is a minor permit.

Other permits in the Middle East Plum Creek subwatershed (HUC 101900020503)

Nearby on the register

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

What this page shows

CITADEL SUBSTATION is one of 289 general permit coverages in Douglas County, and 12.5% of those coverages have a violation on file. Within the Middle East Plum Creek subwatershed, the permit sits among 30 NPDES permits, and it has no pollutants under a numeric limit and no pollutants with an effluent exceedance.