Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
4525
| WA | | Columbia River, lower | 1996 |
17080003
| Lower Columbia-Clatskanie | established |
877564
| WA | Cowlitz | Columbia River at Deer Island (RKm 126.6) | 1996 |
17080003
| Lower Columbia-Clatskanie | established |
877567
| WA | Wahkiakum | Columbia River at Miller Sands (RKm 38.4) | 1996 |
17080006
| Lower Columbia | established |
877562
| WA | Wahkiakum | Columbia River at Puget Island (RKm 59.5) | 1996 |
17080003
| Lower Columbia-Clatskanie | established |