Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
280518
| MD | Montgomery | Cabin John Run by Seven Locks Road, beneath and near I-495 bridge crossing, W side of Bethesda | 2010 |
02070008
| Middle Potomac-Catoctin | established |
746664
| MD | Montgomery | Cabin John Run by Seven Locks Road, beneath and near I-495 bridge crossing, W side of Bethesda | 2010 |
02070008
| Middle Potomac-Catoctin | established |
746690
| 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 | established |
280520
| 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 | established |
746659
| 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 | established |
280515
| 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 |