Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
28915
| CA | | Central Valley drainage | 1976 |
18020125
| Upper Yuba | established |
33544
| ID | | Snake River below the falls drainage | 1996 |
17040212
| Upper Snake-Rock | established |
1322419
| ID | Valley | Horsethief Reservoir | 2015 |
17050123
| North Fork Payette | established |
36474
| MT | Lake | Ninepipe Reservoir, west of the Continental Divide | 1971 |
17010212
| Lower Flathead | collected |
40454
| OR | | Willamette Valley | 1979 |
17090012
| Lower Willamette | established |
165300
| OR | Columbia | Big McNary Lake on Sauvie Island in the Columbia River | 1995 |
17090012
| Lower Willamette | established |
296053
| OR | Columbia | Sauvie Island Lakes and sloughs, northwest of Portland and east of highway 30. | 2013 |
17090012
| Lower Willamette | established |
40708
| OR | Harney-Lake | Warner Valley in the Great Basin | 1987 |
17120007
| Warner Lakes | established |
40707
| OR | Harney-Lake | Warner Valley in the Great Basin | 1987 |
17120007
| Warner Lakes | established |
1710623
| TX | Galveston | Galveston Bay, TX | 1962 |
12040202
| East Galveston Bay | |