Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
613210
| MD | Washington | Cascade Lake At Camp Titchie, Near Penmar, Washington Co., Md. | 1949 |
02070004
| Conococheague-Opequon | established |
157937
| MD | Washington | Chesapeake and Ohio Canal National Historical Park | 1999 |
02070004
| Conococheague-Opequon | established |
613212
| MD | Washington | Hagerstown, Md | 1998 |
02070004
| Conococheague-Opequon | established |
42439
| PA | | Conococheague-Opequon drainage of the Potomac | 1983 |
02070004
| Conococheague-Opequon | established |
166166
| VA | | Conococheague-Opequon drainage of the Potomac | 1994 |
02070004
| Conococheague-Opequon | established |