Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
40405
| OR | | Columbia River | 1896 |
17080003
| Lower Columbia-Clatskanie | established |
40710
| OR | | Columbia River (probably referring to lower Columbia) | 1979 |
17080003
| Lower Columbia-Clatskanie | collected |
46012
| WA | Clark | Blue Lake, diked from the Columbia River | 1932 |
17080003
| Lower Columbia-Clatskanie | failed |
45739
| WA | Cowlitz | Silver Lake | 1888 |
17080005
| Lower Cowlitz | established |
45738
| WA | Cowlitz-Lewis | Cowlitz River | 1896 |
17080005
| Lower Cowlitz | established |