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Clean Water Act discharge permit · NPDES COR427364

ARROYO SOLAR PROJECT, Pueblo, CO: NPDES COR427364 discharge permit, effluent exceedances, inspections, penalties

ARROYO SOLAR PROJECT, held by M.A. Mortenson Company, holds NPDES permit COR427364. EPA’s file records it issued April 24, 2025 and expiring March 31, 2029.

ARROYO SOLAR PROJECT, Pueblo, Colorado: Coverage under a general permit COR427364, held by M.A. Mortenson Company; Effective; issued April 24, 2025, term to March 31, 2029.

Other permits held by M.A. Mortenson Company

ARROYO SOLAR PROJECT among its neighbors

EPA’s permit file holds 15 discharge permits in the Outlet Saint Chariles River subwatershed (HUC 110200021201), COR427364 among them. Its county holds 205, 5 of them major permits; COR427364 is a minor permit.

Other permits in the Outlet Saint Chariles River subwatershed (HUC 110200021201)

  • CESAR PIT, Pueblo: COG501836, minor permit, discharging to St Charles River, permit term to December 31, 2021
  • COMANCHE BOTTOM ASH POND CLOSURE, Pueblo: COR421864, minor permit, permit term to March 31, 2024
  • CORTNER PIT, Pueblo: COG501717, minor permit, discharging to unnamed tributary to St Charles River, permit term to December 31, 2021
  • CR MINERALS, Pueblo: COR901736, minor permit, discharging to Saint Charles River, permit term to June 30, 2029
  • G C C RIO GRANDE INC, Pueblo: COL901013, minor permit, permit term to December 31, 2025
  • GCC RIO GRANDE PUEBLO, Pueblo: COR901013, minor permit, discharging to Unnamed tributary to Salt Creek, permit term to June 30, 2017
  • HUCKLEBERRY SWITCHING STATION, Pueblo: COR427606, minor permit, permit term to March 31, 2029
  • PROGRESS RAIL SERVICES PUEBLO, Pueblo County: COR901180, minor permit, discharging to St Charles River - Arkansas River, permit term to June 30, 2017
  • PUBLIC SERVICE COMPANY OF COLO, Pueblo: COL650003, minor permit, permit term to December 31, 2025
  • PUEBLO PLANT, Pueblo: COG501540, minor permit, discharging to St. Charles River, permit term to June 30, 2013

What the register holds for ARROYO SOLAR PROJECT: its NPDES ID, its permit type and status, its dates, its address in Pueblo, Colorado. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES COR427364.

Identity

Facility as filedARROYO SOLAR PROJECT
Permittee as filedM.A. Mortenson Company
NPDES IDCOR427364
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedApril 24, 2025
Expiration dateMarch 31, 2029
AddressPueblo, CO 81022
SubwatershedOutlet Saint Chariles River (HUC 110200021201)

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES COR427364.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES COR427364.

Inspections

EPA’s inspection file holds no inspection for NPDES COR427364.

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 COR427364.

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Nearby on the register

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

What this page shows

This public-records page covers the NPDES discharge permit COR427364 held by M.A. Mortenson Company for the ARROYO SOLAR PROJECT in Pueblo, CO, with Effective permit status, a Minor discharger class, and an issue date of April 24, 2025 and expiration date of March 31, 2029. The register lists 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, and no effluent or single-event violation is on file for this permit.