Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
242989
| OR | Multnomah | Columbia Slough, Incendiary Bridge | 2002 |
17090012
| Lower Willamette | established |
242990
| OR | Multnomah | Columbia Slough, Kelly Point Park | 2002 |
17090012
| Lower Willamette | established |
859145
| OR | Multnomah | Portland | 2013 |
17090012
| Lower Willamette | established |
1703728
| OR | Multnomah | Willamette River | 2022 |
17090012
| Lower Willamette | established |
1417520
| OR | Multnomah | Willamette river down stream of Portland OR | 2017 |
17090012
| Lower Willamette | established |
1473629
| OR | Multnomah | Willamette River, inside Ross Island lagoon on west side | 2018 |
17090012
| Lower Willamette | established |