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Clean Water Act discharge permit · NPDES CO0032115

TRAPPER MINE, Moffat County, CO: NPDES CO0032115 discharge permit, effluent exceedances, inspections, penalties

TRAPPER MINE, held by Trapper Mining Inc, holds NPDES permit CO0032115, which discharges to Various Gulches. EPA’s file records it issued September 19, 2012 and expiring October 31, 2017.

TRAPPER MINE, Moffat County, Colorado: Individual permit CO0032115, held by Trapper Mining Inc; Administratively continued (past its expiration date and still in force until reissued); issued September 19, 2012, term to October 31, 2017; discharges to VARIOUS GULCHES.

  • Solids, total suspended: 26 limits, 80 violations of any kind, 66 effluent exceedances, latest May 31, 2026, largest 2,020% over the limit.
  • Iron, total [as Fe]: 26 limits, 44 violations of any kind, 26 effluent exceedances, latest June 30, 2019, largest 800% over the limit.
  • pH: 26 limits, 13 violations of any kind, 3 effluent exceedances, latest July 31, 2021.
  • Iron, total recoverable: 0 limits, 3 violations of any kind, 3 effluent exceedances, latest February 28, 2025, largest 100% over the limit.
  • Flow, in conduit or thru treatment plant: 26 limits, 12 violations of any kind, 2 effluent exceedances, latest June 30, 2019, largest 188% over the limit.
  • LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia: 6 limits, 2 violations of any kind, 1 effluent exceedance, latest December 31, 1997, largest 4% over the limit.
  • Solids, total dissolved: 0 limits, 14 violations of any kind, 0 effluent exceedances.
  • Solids, settleable: 0 limits, 12 violations of any kind, 0 effluent exceedances.
  • Oil and grease: 13 limits, 5 violations of any kind, 0 effluent exceedances.
  • Oil and grease visual: 13 limits, 5 violations of any kind, 0 effluent exceedances.
  • LC50 Static Renewal 96Hr Acute Pimephales promelas: 5 limits, 2 violations of any kind, 0 effluent exceedances.
  • LC50 Static Renewal 48Hr Acute Pimephales promelas: 1 limit, 0 violations of any kind, 0 effluent exceedances.

TRAPPER MINE among its neighbors

EPA’s permit file holds 1 discharge permits in the Jeffway Gulch-Williams Fork subwatershed (HUC 140500011002), CO0032115 among them. Its county holds 55, 1 of them major permits; CO0032115 is a minor permit.

Identity

Facility as filedTRAPPER MINE
Permittee as filedTrapper Mining Inc
NPDES IDCO0032115
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedSeptember 19, 2012
Expiration dateOctober 31, 2017
AddressMoffat County, CO 81625
Receiving waterVARIOUS GULCHES
SubwatershedJeffway Gulch-Williams Fork (HUC 140500011002)
SIC1221 – Bituminous Coal And Lignite - Surface
Other EPA IDs (FRS)RCRA handler COD983794025; ICIS-AIR source CO0000000808100005

Effluent limits and exceedances

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Solids, total suspended268066May 31, 20262,020% over the limit
Iron, total [as Fe]264426June 30, 2019800% over the limit
pH26133July 31, 2021
Iron, total recoverable033February 28, 2025100% over the limit
Flow, in conduit or thru treatment plant26122June 30, 2019188% over the limit
LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia621December 31, 19974% over the limit
Solids, total dissolved0140
Solids, settleable0120
Oil and grease1350
Oil and grease visual1350
LC50 Static Renewal 96Hr Acute Pimephales promelas520
LC50 Static Renewal 48Hr Acute Pimephales promelas100

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES CO0032115.

Inspections

EPA’s inspection file holds no inspection for NPDES CO0032115.

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 CO0032115.

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Nearby on the register

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

What this page shows

This public-records page covers NPDES permit CO0032115 for TRAPPER MINE in Moffat County, CO, held by Trapper Mining Inc, with the permit status listed as administratively continued. The figures listed are 9 for the discharger class and 6 for pollutants under a numeric limit, along with 6 pollutants showing an effluent exceedance.