Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
157934
| MD | Washington | Chesapeake and Ohio Canal National Historical Park | 1999 |
02070004
| Conococheague-Opequon | established |
549661
| MD | Washington | Hagerstown, Md | 1998 |
02070004
| Conococheague-Opequon | unknown |
549664
| MD | Washington | Licking Creek | 1998 |
02070004
| Conococheague-Opequon | unknown |
41975
| PA | | Potomac drainage | 1998 |
02070004
| Conococheague-Opequon | established |
45506
| VA | Frederick | Conococheague-Opequon system, in Hague Creek | 1994 |
02070004
| Conococheague-Opequon | established |
549677
| VA | Frederick | Hogue Cr., Winchester, Va | 1997 |
02070004
| Conococheague-Opequon | unknown |