Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
166834
| OR | Columbia | Columbia River (R.M. 54) at Crims Island [~7 miles below Longview, WA] | 2006 |
17080003
| Lower Columbia-Clatskanie | established |
877349
| OR | Columbia | McBride Creek, at mouth | 2015 |
17080003
| Lower Columbia-Clatskanie | established |
261308
| OR | Columbia | Westport Slough, 4.85 mi upstream near Columbia River confluence near Westport, Oregon | 2009 |
17080003
| Lower Columbia-Clatskanie | established |
785921
| OR | Multnomah | Columbia Slough | 2014 |
17090012
| Lower Willamette | established |
238456
| OR | Multnomah | Ramsey Wetland [=Ramsey Lake] in Portland [near the mouth of the Willamette River] | 2007 |
17090012
| Lower Willamette | established |
241934
| OR | Multnomah | Sandy River, near mouth with the Columbia River [near Troutdale] | 2007 |
17080001
| Lower Columbia-Sandy | established |
241935
| OR | Multnomah | Sandy River, near mouth with the Columbia River [near Troutdale] | 2007 |
17080001
| Lower Columbia-Sandy | established |
785920
| OR | Multnomah | Willamette River, along east bank just upstream from the Ross Island Sand and Gravel Co. boat ramp | 2015 |
17090012
| Lower Willamette | established |
886066
| OR | Multnomah | Willamette River, east bank downstream of Ross Island | 2015 |
17090012
| Lower Willamette | established |
886065
| OR | Multnomah | Willamette River, near Riverdale | 2015 |
17090012
| Lower Willamette | established |
166656
| WA | | East Fork Lewis River in western Washington | 2004 |
17080002
| Lewis | established |
166655
| WA | | East Fork Lewis River in western Washington | 2006 |
17080002
| Lewis | established |
261902
| WA | Cowlitz | Columbia River at Martin Island [just N of Woodland] | 2009 |
17080003
| Lower Columbia-Clatskanie | established |
261901
| WA | Cowlitz | Columbia River, at the head of Carrolls Channel [just S of Kelso] | 2009 |
17080003
| Lower Columbia-Clatskanie | established |
551035
| WA | Skamania | Duncan Spring Channel | 2012 |
17080001
| Lower Columbia-Sandy | established |
551036
| WA | Skamania | Duncan Spring Channel | 2012 |
17080001
| Lower Columbia-Sandy | established |
551037
| WA | Skamania | Duncan Spring Channel | 2012 |
17080001
| Lower Columbia-Sandy | established |
547362
| WA | Skamania | Duncan Spring Channel | 2013 |
17080001
| Lower Columbia-Sandy | established |
551032
| WA | Skamania | Duncan Spring Channel | 2013 |
17080001
| Lower Columbia-Sandy | established |
551033
| WA | Skamania | Duncan Spring Channel | 2013 |
17080001
| Lower Columbia-Sandy | established |
551034
| WA | Skamania | Duncan Spring Channel | 2013 |
17080001
| Lower Columbia-Sandy | established |