Clean Water Act discharge permit · NPDES ID0028586
US ARMY CORPS OF ENGINEERS - DWORSHAK DAM, Ahsahka, ID: NPDES ID0028586 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
US ARMY CORPS OF ENGINEERS - DWORSHAK DAM, held by DWORSHAK DAM - USACE, holds NPDES permit ID0028586, which discharges to Clearwater River. EPA’s file records it issued September 20, 2023 and expiring March 31, 2029. 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 | US ARMY CORPS OF ENGINEERS - DWORSHAK DAM |
|---|---|
| Permittee as filed | DWORSHAK DAM - USACE |
| NPDES ID | ID0028586 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Federal facility |
| Issued | September 20, 2023 |
| Expiration date | March 31, 2029 |
| Issuing agency | REGION 10, U.S. EPA |
| Address | Ahsahka, ID 83520 |
| Receiving water | CLEARWATER RIVER |
| Subwatershed | Wolf Creek (HUC 170601010301) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 8Pollutants on file
- 8Under a numeric limit
- 1With a violation of any kind
- 0With 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 |
|---|---|---|---|---|---|
| Oil & Grease | 12 | 21 | 0 | ||
| Temperature, water deg. centigrade | 48 | 0 | 0 | ||
| pH | 24 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 18 | 0 | 0 | ||
| Mercury, total [as Hg] | 18 | 0 | 0 | ||
| Methylmercury | 18 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 6 | 0 | 0 | ||
| Oil and grease visual | 1 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES ID0028586.
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 ID0028586.
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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, ID0028586.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/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 ID0028586 there.
Nearby on the register
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- Every permit record in Ahsahka, A to Z
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- Every permit record in Idaho, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.