Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
153249
| VA | | middle Potomac-Catoctin drainage | 1994 |
02070008
| Middle Potomac-Catoctin | established |
1674602
| VA | Fairfax | [No locality description provided] | 2020 |
02070008
| Middle Potomac-Catoctin | |
1739521
| VA | Fairfax | [No locality description provided] | 2024 |
02070008
| Middle Potomac-Catoctin | |
611618
| VA | Fairfax | Difficult Run at Leigh Mill Road, about 2.0 air miles SE town of Great Falls | 1995 |
02070008
| Middle Potomac-Catoctin | established |
1654849
| VA | Fairfax | Fairfax County, VA, USA | 2020 |
02070008
| Middle Potomac-Catoctin | established |
280465
| VA | Fairfax | Little Difficult Run by Stuart Mill Road, ca. 1.4 road miles E off Fox Mill Road, 4.1 air miles WNW center of Vienna | 2010 |
02070008
| Middle Potomac-Catoctin | established |
746068
| VA | Fairfax | Little Difficult Run by Stuart Mill Road, ca. 1.4 road miles E off Fox Mill Road, 4.1 air miles WNW center of Vienna | 2010 |
02070008
| Middle Potomac-Catoctin | established |
746148
| VA | Fairfax | Wolf Trap Creek by Rosewood Hill Drive, just N of Browns Mill Road, 3.8 air miles NNW center of Vienna | 2010 |
02070008
| Middle Potomac-Catoctin | established |
280466
| VA | Fairfax | Wolf Trap Creek by Rosewood Hill Drive, just N of Browns Mill Road, 3.8 air miles NNW center of Vienna. | 2010 |
02070008
| Middle Potomac-Catoctin | established |
1675651
| VA | Loudoun | [No locality description provided] | 2020 |
02070008
| Middle Potomac-Catoctin | |