Clean Water Act discharge permit · NPDES WY0003115
DAVE JOHNSTON POWER PLANT, WY: NPDES WY0003115 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 16Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
DAVE JOHNSTON POWER PLANT, held by PacifiCorp, holds NPDES permit WY0003115. EPA’s file records it issued December 22, 2009 and expiring November 30, 2014. 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.
Identity
| Facility as filed | DAVE JOHNSTON POWER PLANT |
|---|---|
| Permittee as filed | PacifiCorp |
| NPDES ID | WY0003115 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | December 22, 2009 |
| Expiration date | November 30, 2014 |
| Issuing agency | WDEQ |
| Address | WY |
| Subwatershed | Dry Creek-North Platte River (HUC 101800070905) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 16Pollutants on file
- 16Under a numeric limit
- 11With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| Iron, total [as Fe] | 10 | 26 | 14 | June 30, 2017 | 180% over the limit |
| Solids, total suspended | 25 | 43 | 12 | June 30, 2024 | 72% over the limit |
| Oxidants, total residual | 20 | 38 | 2 | January 31, 2018 | 1,502% over the limit |
| Flow | 50 | 66 | 0 | ||
| pH | 30 | 36 | 0 | ||
| Produced water, oil and grease | 15 | 18 | 0 | ||
| Selenium, total recoverable | 11 | 12 | 0 | ||
| Copper, total [as Cu] | 10 | 12 | 0 | ||
| Temperature, water deg. centigrade | 5 | 9 | 0 | ||
| Pass/Fail Static 48Hr Acute Ceriodaphnia dubia | 3 | 2 | 0 | ||
| Pass/Fail Static 96 Hr Acute Pimephales Promelas | 3 | 2 | 0 | ||
| Cadmium, dissolved [as Cd] | 6 | 0 | 0 | ||
| Chromium, dissolved [as Cr] | 6 | 0 | 0 | ||
| Lead, dissolved [as Pb] | 6 | 0 | 0 | ||
| Zinc, dissolved [as Zn] | 6 | 0 | 0 | ||
| Mercury, dissolved [as Hg] | 6 | 0 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES WY0003115.
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, WY0003115.
Start the watch
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- One watershed — $2,990/year
- One state — $4,990/year
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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 WY0003115 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.