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Clean Water Act discharge permit · NPDES COR413810

WALKER RESERVOIR, Franktown, CO: NPDES COR413810 discharge permit, effluent exceedances, inspections, penalties

WALKER RESERVOIR, held by HPM, Inc., holds NPDES permit COR413810. EPA’s file records it issued August 23, 2021 and expiring March 31, 2024. 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 WALKER RESERVOIR: its NPDES ID, its permit type and status, its dates, its address in Franktown, Colorado. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES COR413810.

Identity

Facility as filedWALKER RESERVOIR
Permittee as filedHPM, Inc.
NPDES IDCOR413810
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
IssuedAugust 23, 2021
Expiration dateMarch 31, 2024
Issuing agencySTA
AddressFranktown, CO 80116
SubwatershedRussellville Gulch-Cherry Creek (HUC 101900030106)

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 COR413810.

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 COR413810.

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.

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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 COR413810 there.

Nearby on the register

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

What this page shows

The WALKER RESERVOIR general permit coverage in Franktown, Douglas County, Colorado, is one of 289 general permit coverages on EPA's NPDES register in Douglas County, and it sits among 14 NPDES permits in the Russellville Gulch-Cherry Creek subwatershed (HUC 101900030106), this one included. Of all 289 Douglas County coverages, 18.7% were issued before this one, and 12.5% of those 289 have a violation on file, while this permit records 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance.