Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
35123
| MD | | Potomac (HUC6) non-specific | 1980 |
02070000
| Potomac | established |
35142
| MD | | upper Potomac | 1898 |
02070000
| Potomac | established |
547421
| MD | Allegany | Evitts Creek 2 mi East Cumberland Md. | 1934 |
02070002
| North Branch Potomac | established |
547465
| MD | Allegany | Potomac River. | 1998 |
02070003
| Cacapon-Town | established |
547472
| MD | Allegany | Sideling Hill Creek | 1998 |
02070003
| Cacapon-Town | established |
547481
| MD | Allegany | Sideling Hill Creek, Near Cumberland, Md | 1998 |
02070003
| Cacapon-Town | established |
1700890
| MD | Baltimore | [No locality description provided] | 2022 |
02060003
| Gunpowder-Patapsco | |
547449
| MD | Cecil | Octoraro Creek | 1998 |
02050306
| Lower Susquehanna | established |
547732
| MD | Cecil | Susquehanna Drainage: Conowingo Creek: Conowingo Creek Road ~ 500m upstream mout of Conowingo Creek (TJN06-76) | 2006 |
02050306
| Lower Susquehanna | established |
547861
| MD | Cecil | Susquehanna Drainage: Conowingo Creek: Conowingo Creek Road ~ 500m upstream mout of Conowingo Creek (TJN06-76) | 2006 |
02050306
| Lower Susquehanna | established |
547730
| MD | Cecil | Susquehanna-Atlantic Ocean Drainage: Canowingo Creek: Canowingo Lake Rd. ~ 10 km W rising Sun; 1st riffle upstream of mouth: 1.5 km from bridge (TJN07-22) | 2007 |
02050306
| Lower Susquehanna | established |
547862
| MD | Cecil | Susquehanna-Atlantic Ocean Drainage: Canowingo Creek: Canowingo Lake Rd. ~ 10 km W rising Sun; 1st riffle upstream of mouth: 1.5 km from bridge (TJN07-22) | 2007 |
02050306
| Lower Susquehanna | established |
547507
| MD | Frederick | Monocacy River, Thurmont, Md. | 1998 |
02070009
| Monocacy | established |
547427
| MD | Frederick | Monocacy River. | 1998 |
02070009
| Monocacy | established |
268185
| MD | Frederick | Western Maryland, drainages in the Piedmont and Blue Ridge regions | 1981 |
02070009
| Monocacy | established |
547436
| MD | Howard | Patapsco River, Ellicott City, Md. | 1998 |
02060003
| Gunpowder-Patapsco | established |
280419
| 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 |
280416
| 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 |
547484
| MD | Washington | Beaver Creek. | 1994 |
02070004
| Conococheague-Opequon | established |
157931
| MD | Washington | Chesapeake and Ohio Canal National Historical Park | 1999 |
02070004
| Conococheague-Opequon | established |
547504
| MD | Washington | Licking Creek | 1998 |
02070004
| Conococheague-Opequon | established |
547444
| MD | Washington | Side Ling Creek, Cumberland. Coordinates From Gps | 1997 |
02070003
| Cacapon-Town | established |