Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
280517
| DC | District of Columbia | Potomac River, 1.2 mile reach from 400 m above Chain Bridge Road to Fletcher's Boathouse, W end of D.C. and Arlington. | 2010 |
02070010
| Middle Potomac-Anacostia-Occoquan | established |
280519
| DC | District of Columbia | Potomac River, channel along west side of Roosevelt Island above walk bridge, E side of Rosslyn. | 2010 |
02070010
| Middle Potomac-Anacostia-Occoquan | established |