Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
41302
| OR | Marion | Horseshoe Lake, west of St. Paul. | 2001 |
17090007
| Middle Willamette | established |
297129
| OR | Marion | Horseshoe Lake, west of St. Paul. | 2009 |
17090007
| Middle Willamette | established |
297134
| OR | Marion | Horseshoe Lake, west of St. Paul. | 2013 |
17090007
| Middle Willamette | established |
40508
| OR | Marion | Willamette River near Minto's Island (Near Salem) | 1889 |
17090007
| Middle Willamette | established |
40509
| OR | Marion | Willamette River near Salem | 1893 |
17090007
| Middle Willamette | established |
40563
| OR | Polk | Willamette River at Salem | 1893 |
17090007
| Middle Willamette | established |
41500
| OR | Yamhill | Willamette River sloughs, from Newberg to Wheatland Ferry. | 2001 |
17090007
| Middle Willamette | established |
299937
| OR | Yamhill | Willamette River sloughs, from Newberg to Wheatland Ferry. | 2009 |
17090007
| Middle Willamette | established |
299943
| OR | Yamhill | Willamette River sloughs, from Newberg to Wheatland Ferry. | 2013 |
17090007
| Middle Willamette | established |