Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
1525594
| WA | Grays Harbor | Chehalis River | 2002 |
17100104
| Lower Chehalis | established |
243280
| WA | Grays Harbor | Chehalis River [near South Elma] | 2002 |
17100104
| Lower Chehalis | established |
230813
| WA | Grays Harbor | Chehalis River, upstream of the Satsop River mouth. | 1991 |
17100104
| Lower Chehalis | established |
1529212
| WA | Grays Harbor | Duck Lake | 2014 |
17100105
| Grays Harbor | established |
1528005
| WA | Grays Harbor | Duck Lake | 2018 |
17100105
| Grays Harbor | established |
1526800
| WA | Grays Harbor | Grayland Ditch | 2007 |
17100105
| Grays Harbor | established |
243285
| WA | Grays Harbor | Grayland Ditch [in Grayland] | 2007 |
17100105
| Grays Harbor | established |
1526801
| WA | Lewis | Chehalis River | 1995 |
17100103
| Upper Chehalis | established |
1525596
| WA | Lewis | Chehalis River | 1996 |
17100103
| Upper Chehalis | established |
1529214
| WA | Lewis | Chehalis River | 1997 |
17100103
| Upper Chehalis | established |
243284
| WA | Lewis | Chehalis River [in Chehalis] | 1995 |
17100103
| Upper Chehalis | established |
229869
| WA | Lewis | Chehalis River, from Centralia (approx. 2.5 miles downstream of Borst Park) to the mouth in Grays Harbor. | 1995 |
17100104
| Lower Chehalis | established |
1528007
| WA | Lewis | Interstate Ave Slough | 1996 |
17100103
| Upper Chehalis | established |
1526802
| WA | Lewis | Interstate Ave Slough | 1997 |
17100103
| Upper Chehalis | established |
243286
| WA | Lewis | Interstate Avenue Sloughs [in Chehalis] | 1997 |
17100103
| Upper Chehalis | collected |
243277
| WA | Pacific | Long Beach Sloughs [near Long Beach] | 2000 |
17100106
| Willapa Bay | established |
1525597
| WA | Pacific | Sloughs near Long Beach | 2000 |
17100106
| Willapa Bay | established |