| Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
|
40588
| OR | Clackamas | Lake Oswego | 1946 |
17090012
| Lower Willamette | established |
|
1891876
| OR | Columbia | [No locality description provided] | 2025 |
17090012
| Lower Willamette | |
|
165306
| OR | Columbia | Big McNary Lake on Sauvie Island in the Columbia River | 1995 |
17090012
| Lower Willamette | established |
|
243171
| OR | Columbia | Multnomah Channel, Sauvie Island-Gilbert River Boat Ramp | 2002 |
17090012
| Lower Willamette | established |
|
40942
| OR | Columbia | Santosh Slough, off Multnomah channel north of Scappoose, approximately 2.7 miles beyond Columbia County airport via Dike Road off hwy 30. | 2001 |
17090012
| Lower Willamette | established |
|
296034
| OR | Columbia | Santosh Slough, off Multnomah channel north of Scappoose, approximately 2.7 miles beyond Columbia County airport via Dike Road off hwy 30. | 2009 |
17090012
| Lower Willamette | established |
|
296039
| OR | Columbia | Santosh Slough, off Multnomah channel north of Scappoose, approximately 2.7 miles beyond Columbia County airport via Dike Road off hwy 30. | 2013 |
17090012
| Lower Willamette | established |
|
40935
| OR | Columbia | Sauvie Island Lakes and sloughs, northwest of Portland and east of highway 30. | 2001 |
17090012
| Lower Willamette | established |
|
296047
| OR | Columbia | Sauvie Island Lakes and sloughs, northwest of Portland and east of highway 30. | 2009 |
17090012
| Lower Willamette | established |
|
40948
| OR | Columbia | Scappoose Bay, south end of the city pf St. Helens, off Multnomah channel. | 2001 |
17090012
| Lower Willamette | established |
|
296057
| OR | Columbia | Scappoose Bay, south end of the city pf St. Helens, off Multnomah channel. | 2009 |
17090012
| Lower Willamette | established |
|
296062
| OR | Columbia | Scappoose Bay, south end of the city pf St. Helens, off Multnomah channel. | 2013 |
17090012
| Lower Willamette | established |
|
41360
| OR | Multnomah | Bybee Lake, North Portland Road, Portland. | 2001 |
17090012
| Lower Willamette | established |
|
297304
| OR | Multnomah | Bybee Lake, North Portland Road, Portland. | 2009 |
17090012
| Lower Willamette | established |
|
297310
| OR | Multnomah | Bybee Lake, North Portland Road, Portland. | 2013 |
17090012
| Lower Willamette | established |
|
41757
| OR | Multnomah | Columbia slough, in north Portland, between Marine Drive on north and highway 30 on south, numerous road crossings. | 2001 |
17090012
| Lower Willamette | established |
|
297321
| OR | Multnomah | Columbia slough, in north Portland, between Marine Drive on north and highway 30 on south, numerous road crossings. | 2009 |
17090012
| Lower Willamette | established |
|
297326
| OR | Multnomah | Columbia slough, in north Portland, between Marine Drive on north and highway 30 on south, numerous road crossings. | 2013 |
17090012
| Lower Willamette | established |
|
40569
| OR | Multnomah | Willamette River (Guild's Lake) Portland | 1905 |
17090012
| Lower Willamette | established |