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Clean Water Act discharge permit · NPDES COR418659

KOCH RESIDENCE, Greenwood Village, CO: NPDES COR418659 discharge permit, effluent exceedances, inspections, penalties

KOCH RESIDENCE, held by Sienna Custom Homes, holds NPDES permit COR418659. EPA’s file records it issued November 4, 2022 and expiring March 31, 2024.

KOCH RESIDENCE, Greenwood Village, Colorado: Coverage under a general permit COR418659, held by Sienna Custom Homes; Administratively continued (past its expiration date and still in force until reissued); issued November 4, 2022, term to March 31, 2024, by STA.

KOCH RESIDENCE among its neighbors

EPA’s permit file holds 58 discharge permits in the Little Dry Creek subwatershed (HUC 101900020903), COR418659 among them. Its county holds 449, 3 of them major permits; COR418659 is a minor permit.

Other permits in the Little Dry Creek subwatershed (HUC 101900020903)

  • #10 SUNSET DRIVE, Cherry Hills Village: COR428726, minor permit, permit term to March 31, 2029
  • 15 CHERRY HILLS DRIVE, Cherry Hills Vilalge: COR425008, minor permit, permit term to March 31, 2029
  • 1640 E LAYTON, Englewood: COR427792, minor permit, permit term to March 31, 2029
  • 247 BARN, Greenwood Village: COR429034, minor permit, permit term to March 31, 2029
  • 2709 E WILLAMETTE LN, Greenwood Village: COR431207, minor permit, permit term to March 31, 2029
  • 3300 E BELLEVEIW NELLIGAN, Greenwood Village: COR426263, minor permit, permit term to March 31, 2029
  • 3560 WILLAMETTE LANE, Greenwood Village: COR423784, minor permit, permit term to March 31, 2029
  • 441SOA LLC, Englewood: COR419779, minor permit, permit term to March 31, 2024
  • 4600 S MONROE LANE, Arapahoe County: COG072859, minor permit, discharging to Greenwood Gulch, permit term to November 30, 2011
  • 4970 S FARIFAX STREET, Cherry Hills Village: COR425183, minor permit, permit term to March 31, 2029

What the register holds for KOCH RESIDENCE: its NPDES ID, its permit type and status, its dates, its address in Greenwood Village, Colorado. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES COR418659.

Identity

Facility as filedKOCH RESIDENCE
Permittee as filedSienna Custom Homes
NPDES IDCOR418659
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
IssuedNovember 4, 2022
Expiration dateMarch 31, 2024
Issuing agencySTA
AddressGreenwood Village, CO 80121
SubwatershedLittle Dry Creek (HUC 101900020903)

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES COR418659.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES COR418659.

Inspections

EPA’s inspection file holds no inspection for NPDES COR418659.

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 COR418659.

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Nearby on the register

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

What this page shows

The KOCH RESIDENCE permit, held by Sienna Custom Homes, is one of 360 general permit coverages in Arapahoe County on EPA's NPDES register, and it sits among 58 NPDES permits in the Little Dry Creek subwatershed. Its record shows no pollutants under a numeric limit and no effluent exceedances, both counted as zero.