Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
745270
| 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 | unknown |
745276
| 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 | unknown |
745269
| MD | Montgomery | Potomac River, 0.7 mile reach from E end of Swainsons Island upstream to head of Plummers Island and I-495 bridge, SW edge of Bethesda | 2010 |
02070008
| Middle Potomac-Catoctin | unknown |
745275
| MD | Montgomery | Potomac River, side channels on N side of Swainsons Island, ca. 0.5 miles downstream (E of) I-495 crossing, SW side of Bethesda | 2010 |
02070008
| Middle Potomac-Catoctin | unknown |
280381
| MD | Montgomery | Potomac River, upstream and downstream ends of Plummers Island and Swainson Island area, just E of I-495 crossing, W side of Bethesda | 2010 |
02070008
| Middle Potomac-Catoctin | established |
745274
| MD | Montgomery | Potomac River, upstream and downstream ends of Plummers Island and Swainson Island area, just E of I-495 crossing, W side of Bethesda | 2010 |
02070008
| Middle Potomac-Catoctin | unknown |