Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
243082
| OR | Columbia | Multnomah Channel, Sauvie Island-Gilbert River Boat Ramp | 2002 |
17090012
| Lower Willamette | established |
243109
| OR | Columbia | Sturgeon Lake mouth, Multnomah Channel | 2003 |
17090012
| Lower Willamette | established |
890059
| OR | Multnomah | Columbia River, [(island is over 16 mi. long), ca. 13 mi. NNW of Portland, ca. 9 mi. NW of Vancouver] | 1998 |
17090012
| Lower Willamette | established |
243075
| OR | Multnomah | Columbia Slough, Incendiary Bridge | 2002 |
17090012
| Lower Willamette | established |
243080
| OR | Multnomah | Columbia Slough, Mouth, Kelly Point Park | 2002 |
17090012
| Lower Willamette | established |
243079
| OR | Multnomah | Columbia Slough, Portland, near I-5 bridge. | 2002 |
17090012
| Lower Willamette | established |
890060
| OR | Multnomah | Willamette River, [Harborton is 1.36 mi SE of United Junction, 2.85 mi SE of Burlington] | 2001 |
17090012
| Lower Willamette | established |
51675
| OR | Multnomah | Willamette River, confluence with Columbia River | 1959 |
17090012
| Lower Willamette | established |