Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
40407
| OR | Benton | Long Tom River at Monroe, Benton County, OR | 1992 |
17090003
| Upper Willamette | failed |
40775
| OR | Hood River | Columbia River near city of Hood River | 1990 |
17070105
| Middle Columbia-Hood | failed |
40397
| OR | Malheur | Snake River near city of Ontario | 1991 |
17050115
| Middle Snake-Payette | failed |
40518
| OR | Multnomah | Sellwood Park Pond in Portland, river km 26.7 on the Willamette River | 1995 |
17090012
| Lower Willamette | failed |
40785
| OR | Multnomah | Willamette River near Portland | 1988 |
17090012
| Lower Willamette | failed |