Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
40482
| OR | Multnomah | Troutdale on the Sandy River near Columbia River (West of the Willamette River?) | 1881 |
17080001
| Lower Columbia-Sandy | established |
163997
| WA | Clark | Steigerwald Lake National Wildlife Refuge | 2005 |
17080001
| Lower Columbia-Sandy | established |
163914
| WA | Skamania | Franz Lake National Wildlife Refuge [Along the Columbia River, 2.2 km (1.4 mi) WSW of Skamania] | 2005 |
17080001
| Lower Columbia-Sandy | established |
163990
| WA | Skamania | Pierce National Wildlife Refuge | 2005 |
17080001
| Lower Columbia-Sandy | established |