Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
236803
| OR | | Willamette River from RK 5 to Keizer (RK 129)(upper portion - above Oregon City) | 1995 |
17090007
| Middle Willamette | established |
279684
| OR | Clackamas | Willamette River, 10000 m upstream of I-5 bridge to 7500 m downstream of Molalla River State Park. | 1998 |
17090007
| Middle Willamette | established |
279745
| OR | Clatsop | Columbia River estuary. | 2003 |
17080003
| Lower Columbia-Clatskanie | established |
279688
| OR | Clatsop | Lewis and Clark River, ca. 2 miles above mouth. | 1998 |
17080006
| Lower Columbia | established |
279744
| OR | Clatsop | Miller Sands Island, in the Columbia River, 5 miles upriver from Astoria. | 1993 |
17080006
| Lower Columbia | established |
165297
| OR | Columbia | Big McNary Lake on Sauvie Island in the Columbia River | 1995 |
17090012
| Lower Willamette | established |
279678
| OR | Columbia | Columbia River | 1981 |
17080003
| Lower Columbia-Clatskanie | established |
279676
| OR | Columbia | Columbia River | 1983 |
17080003
| Lower Columbia-Clatskanie | established |
274473
| OR | Columbia | Columbia River (R.M. 54) at Crims Island [~7 miles below Longview, WA] | 2003 |
17080003
| Lower Columbia-Clatskanie | established |
274520
| OR | Columbia | Columbia River (R.M. 54) at Crims Island [~7 miles below Longview, WA] | 2008 |
17080003
| Lower Columbia-Clatskanie | established |
253617
| OR | Columbia | Columbia River, lower | 1960 |
17080003
| Lower Columbia-Clatskanie | established |
877348
| OR | Columbia | McBride Creek, at mouth | 2015 |
17080003
| Lower Columbia-Clatskanie | established |
1675029
| OR | Multnomah | [No locality description provided] | 2020 |
17080001
| Lower Columbia-Sandy | |
236802
| OR | Multnomah | Willamette River just above Portland (RK 27) | 1988 |
17090012
| Lower Willamette | established |
236799
| OR | Multnomah | Willamette River near Portland | 1982 |
17090012
| Lower Willamette | established |
279680
| OR | Polk | Baskett Slough | 1984 |
17090007
| Middle Willamette | established |
1256634
| OR | Sherman | John Day Dam, Smolt Monitoring Facility | 2016 |
17070105
| Middle Columbia-Hood | established |