Clean Water Act discharge permit · NPDES COR427354

22023913 - WATERTON ROXBOROUGH 115 KV REBUILD, Littleton, CO: NPDES COR427354 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

22023913 - WATERTON ROXBOROUGH 115 KV REBUILD, held by CORE Electric Cooperative, holds NPDES permit COR427354. EPA’s file records it issued April 24, 2025 and expiring March 31, 2029.

22023913 - WATERTON ROXBOROUGH 115 KV REBUILD, Littleton, Colorado: Coverage under a general permit COR427354, held by CORE Electric Cooperative; Effective; issued April 24, 2025, term to March 31, 2029.

Other permits held by CORE Electric Cooperative

CITADEL SUBSTATION, Castle Rock: COR420389, issued May 22, 2023
ELT30 WOLFENSBERGER-CITADEL 115KV TRANSMISSION LINE, Castle Rock: COR423617, issued May 2, 2024
SPRING VALLEY SUBSTATION, Elizabeth: COR424572, issued July 30, 2024
ELS125 PARKER SUBSTATION UPGRADE, Parker: COR425624, issued October 17, 2024
ELS22 SPRING VALLEY 115KV TRANSMISSION LINE, Elizabeth: COR425628, issued October 15, 2024
22012259 CITADEL FEEDER 11, Castle Rock: COR427476, issued May 7, 2025
22012256 CITADEL FEEDERS 3 AND 12, Castle Rock: COR427494, issued May 9, 2025
23030386 SPRING VALLEY WEST FEEDERS, Elizabeth: COR427914, issued June 23, 2025
24063840 SPRING VALLEY FEEDER 03, Elizabeth: COR427926, issued June 24, 2025
20250423 DAKAN RD, Sedalia: COR428229, issued July 31, 2025

22023913 - WATERTON ROXBOROUGH 115 KV REBUILD among its neighbors

EPA’s permit file holds 30 discharge permits in the Chatfield Reservoir subwatershed (HUC 101900020703), COR427354 among them. Its county holds 347, 5 of them major permits; COR427354 is a minor permit.

Other permits in the Chatfield Reservoir subwatershed (HUC 101900020703)

23618 TRAFFIC C-470 AND SH 285, N/A: COR409036, minor permit, permit term to March 31, 2024
25589 C470 RESURFACING, Littleton: COR429493, minor permit, permit term to March 31, 2029
CHATFIELD BASIN WATER RECLAMATION FACILITY, Littleton: CO0041645, minor permit, discharging to SOUTH PLATTE RIVER, permit term to November 30, 2007
CONIFER METROPOLITAN DISTRICT, Littleton: COL589060, minor permit, permit term to December 31, 2025
CPW CHATFIELD STATE PARK, Littleton: COR425496, minor permit, permit term to March 31, 2029
DEER CREEK, Littleton: COR410718, minor permit, permit term to March 31, 2024
ELEMENTARY SCHOOL #51, Littleton: COR429503, minor permit, permit term to March 31, 2029
FOOTHILLS WTF, Douglas County: COG641084, minor permit, discharging to TRIB OF WILLOW CREEK, permit term to October 31, 2010
HOGBACK MINE, Littleton: COG501726, minor permit, discharging to Highline Canal - unnamed trib to South Platte Riv, permit term to December 31, 2021
HOGBACK PROPERTY, Douglas County: COX046043, minor permit, discharging to GROUNDWATER FACILITY, permit term to November 30, 2009

What the register holds for 22023913 - WATERTON ROXBOROUGH 115 KV REBUILD: its NPDES ID, its permit type and status, its dates, its address in Littleton, Colorado. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES COR427354.

Identity

Facility as filed	22023913 - WATERTON ROXBOROUGH 115 KV REBUILD
Permittee as filed	CORE Electric Cooperative
NPDES ID	COR427354
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	April 24, 2025
Expiration date	March 31, 2029
Address	Littleton, CO 80125
Subwatershed	Chatfield Reservoir (HUC 101900020703)

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 COR427354.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES COR427354.

Inspections

EPA’s inspection file holds no inspection for NPDES COR427354.

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 COR427354.

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, COR427354.

Start the watch

How we handle your data → Privacy

Nearby on the register

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

The 22023913 - WATERTON ROXBOROUGH 115 KV REBUILD general permit coverage, filed by CORE Electric Cooperative in Littleton, Douglas County, Colorado, is one of 289 general permit coverages in that county on EPA's NPDES register, and it is one of 30 NPDES permits in the Chatfield Reservoir subwatershed. Among its county peers, 12.5% of the 289 coverages have a violation on file, while this permit has no pollutants under a numeric limit and no pollutants with an effluent exceedance.