NPDES WA0026824 · Clean Water Act
MCNARY LOCK AND DAM - USACE, Umatilla, OR: NPDES WA0026824 discharge permit, effluent exceedances, inspections, penalties
MCNARY LOCK AND DAM - USACE, Umatilla, Oregon: Individual permit WA0026824; Effective; issued March 24, 2023, term to June 30, 2028; discharges to COLUMBIA RIVER; Hydroelectric Power Generation.
3 of the 4 pollutants listed for NPDES WA0026824 have no violation or effluent exceedance.
- Oil & Grease: 4 limits, 6 violations of any kind.
- pH: 8 limits.
- Flow, in conduit or thru treatment plant: 2 limits.
- Oil and grease visual: 1 limit.
MCNARY LOCK AND DAM - USACE among its neighbors
4 discharge permits are in the McNary Dam-Lake Wallula subwatershed (HUC 170701010207); WA0026824 is one. Its county: 21, 2 major; WA0026824 is minor permit.
Other permits in the McNary Dam-Lake Wallula subwatershed (HUC 170701010207)
- BNSF PORTAGE SIDING, Plymouth: WAR308453, minor, term to 2025-12-31
- BNSF PORTAGE SIDING EXTENSION PROJECT, Plymouth: WAR312131, minor, term to 2025-12-31
- UGC MCNARY, Umatilla: ORRZ00120, minor, term to 2026-06-30
Identity
| Facility | MCNARY LOCK AND DAM - USACE |
|---|---|
| Permittee | MCNARY LOCK AND DAM - USACE |
| NPDES ID | WA0026824 |
| Status | Effective |
| Type | Individual permit |
| Class | Minor |
| Facility type | Federal facility |
| Issued | March 24, 2023 |
| Expires | June 30, 2028 |
| Address | Umatilla, OR 97882 |
| Receiving water | COLUMBIA RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | McNary Dam-Lake Wallula (HUC 170701010207) |
| NAICS | 221111 – Hydroelectric Power Generation |
| SIC | 4911 – Electric Services |
| Other EPA IDs (FRS) | RCRA handler ORQ000032757 |
NPDES WA0026824: effluent limits and exceedances
MCNARY LOCK AND DAM - USACE (NPDES WA0026824): 4 pollutants on file, 4 limited; 1 with a violation of any kind, 0 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Oil & Grease | 4 | 6 | 0 | ||
| pH | 8 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 0 | 0 | ||
| Oil and grease visual | 1 | 0 | 0 |
NPDES WA0026824: inspections, violations and enforcement
NPDES WA0026824 (MCNARY LOCK AND DAM - USACE): no single-event violation, inspection, formal enforcement action and informal enforcement action on file.
Watch NPDES WA0026824
NPDES WA0026824: one email when its EPA record changes — $99/month.
Permits near NPDES WA0026824
NPDES WA0026824: 4 pollutant rows, 0 dated events; ICIS-NPDES download, loaded October 14, 2026.