Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
1543692
| WA | Cowlitz | North Fork Lewis River, Merwin Reservoir, at Speelyai Ramp | 2009 |
17080002
| Lewis | established |
1543483
| WA | Cowlitz | North Fork Lewis River, Merwin Reservoir, at Speelyai Ramp | 2016 |
17080002
| Lewis | established |
1543855
| WA | Cowlitz | North Fork Lewis River, Merwin Reservoir, at Speelyai Ramp | 2017 |
17080002
| Lewis | established |
1544233
| WA | Cowlitz | North Fork Lewis River, Merwin Reservoir, at Speelyai Ramp | 2018 |
17080002
| Lewis | established |
1543570
| WA | Cowlitz | North Fork Lewis River, Merwin Reservoir, at Speelyai Ramp | 2018 |
17080002
| Lewis | established |