Clean Water Act discharge permit · NPDES WY0000051
KEMMERER MINE, Kemmerer, WY: NPDES WY0000051 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
KEMMERER MINE, held by Kemmerer Operations, LLC, holds NPDES permit WY0000051. EPA’s file records it issued October 9, 2025 and expiring December 31, 2030. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | KEMMERER MINE |
|---|---|
| Permittee as filed | Kemmerer Operations, LLC |
| NPDES ID | WY0000051 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | October 9, 2025 |
| Expiration date | December 31, 2030 |
| Issuing agency | Wyoming Department of Environmental Quality |
| Address | Kemmerer, WY 83101 |
| Subwatershed | Oakley Draw-Hams Fork (HUC 140401070701) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 8Pollutants on file
- 0Under a numeric limit
- 8With a violation of any kind
- 4With an effluent exceedance
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 measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 0 | 28 | 16 | August 31, 2021 | 1,071% over the limit |
| Iron, total [as Fe] | 0 | 18 | 5 | March 31, 2019 | 99% over the limit |
| Selenium, total recoverable | 0 | 14 | 3 | August 31, 2023 | 20% over the limit |
| pH | 0 | 3 | 1 | June 30, 2020 | |
| Solids, total dissolved | 0 | 22 | 0 | ||
| Flow | 0 | 18 | 0 | ||
| Iron, dissolved [as Fe] | 0 | 4 | 0 | ||
| Duration | 0 | 4 | 0 |
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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 26, 2025 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
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 WY0000051 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.