Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
887908
| OR | Douglas | South Umpqua River, under the Myrtle Creek bridge near I-5 | 2015 |
17100302
| South Umpqua | eradicated |
241829
| OR | Josephine | NE Josephine County | 2000 |
17100310
| Lower Rogue | collected |
852265
| OR | Multnomah | Portland | 2011 |
17080003
| Lower Columbia-Clatskanie | unknown |
1241427
| OR | Multnomah | Portland; east bank of the Willamette River at Oregon Yacht Club | 2013 |
17090012
| Lower Willamette | unknown |
241828
| OR | Wasco | pond near South Junction, 20 miles south of Maupin | 1956 |
17070306
| Lower Deschutes | collected |