Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
746840
| DC | District of Columbia | Potomac River, 1.2 mile reach from 400 m above Chain Bridge Road to Fletchers Boathouse, W end of D.C. and Arlington | 2010 |
02070008
| Middle Potomac-Catoctin | established |
280528
| 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 |
158323
| DC | District of Columbia | Rock Creek Park | 1999 |
02070010
| Middle Potomac-Anacostia-Occoquan | established |