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Clean Water Act discharge permit · NPDES COR428118

37TH ST & MADISON AVE ROUNDABOUT, Loveland, CO: NPDES COR428118 discharge permit, effluent exceedances, inspections, penalties

37TH ST & MADISON AVE ROUNDABOUT, held by Coulson Excavating Company, holds NPDES permit COR428118. EPA’s file records it issued July 22, 2025 and expiring March 31, 2029. 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 37TH ST & MADISON AVE ROUNDABOUT: its NPDES ID, its permit type and status, its dates, its address in Loveland, Colorado. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES COR428118.

Identity

Facility as filed37TH ST & MADISON AVE ROUNDABOUT
Permittee as filedCoulson Excavating Company
NPDES IDCOR428118
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedJuly 22, 2025
Expiration dateMarch 31, 2029
AddressLoveland, CO 80538
SubwatershedBoyd Lake-Big Thompson River (HUC 101900060605)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES COR428118.

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 COR428118.

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, COR428118.

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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 COR428118 there.

Nearby on the register

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

What this page shows

37TH ST & MADISON AVE ROUNDABOUT falls within 322 general permit coverages in Larimer County, where 21.4% have a violation on file. The Boyd Lake-Big Thompson River subwatershed contains 76 NPDES permits, including this permit, and 67.4% of the 322 Larimer County coverages were issued earlier than this permit.