Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
1695327
| OR | Benton | Second slough 1 mile upstream of Hyak Park, west bank | 2021 |
17090003
| Upper Willamette | established |
1695323
| OR | Lane | Dorena Lake at Harms Park | 2021 |
17090002
| Coast Fork Willamette | established |
1695316
| OR | Lane | Dorena Lake near Bluff Creek inlet | 2021 |
17090002
| Coast Fork Willamette | established |
1695338
| OR | Marion | Willamette River, in a side slough | 2021 |
17090007
| Middle Willamette | established |
1695366
| OR | Washington | Commonwealth Lake Park, Portland, Oregon | 2021 |
17090010
| Tualatin | established |