Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
243022
| WA | Cowlitz | Columbia River, Dike Road, North Woodland | 2002 |
17080003
| Lower Columbia-Clatskanie | established |
243023
| WA | Cowlitz | Columbia River, Sportsmens Club boat launch, Kalama | 2002 |
17080003
| Lower Columbia-Clatskanie | established |
243028
| WA | Wahkiakum | Grays River, near Rosburg | 2002 |
17080006
| Lower Columbia | established |