Editing Potomac River (section)

===Tidal Potomac River===
[[File:2016-08-28 10 15 51 View southwest across the Potomac River from the south end of Cobb Island Road on Cobb Island, Charles County, Maryland.jpg|thumb|right|View southwest across the tidal Potomac River from the south end of [[Maryland Route 254|Cobb Island Road]] on [[Cobb Island (Maryland)|Cobb Island]], [[Charles County, Maryland]] ]]
The Tidal Potomac River lies below the [[Atlantic Seaboard fall line|Fall Line]]. This 108-mile (174-km) stretch encompasses the Potomac from a short distance below the [[Washington, DC]] - [[Montgomery County, Maryland|Montgomery County]] line, just downstream of the [[Little Falls of the Potomac River]], to the [[Chesapeake Bay]].<ref>{{cite web |title=Potomac River Basin Fact Sheet |url=https://www.potomacriver.org/wp-content/uploads/2014/11/Potomac-Basin-Fact-Sheet_Oct_2015.pdf |date=October 2015 |website=www.potomacriver.org |publisher=Interstate Commission on the Potomac River Basin (ICPRB) |access-date=28 March 2019 |archive-date=December 16, 2017 |archive-url=https://web.archive.org/web/20171216060733/http://www.potomacriver.org/wp-content/uploads/2014/11/Potomac-Basin-Fact-Sheet_Oct_2015.pdf |url-status=live}}</ref>
Along the way the following tributaries drain into the Potomac: [[Pimmit Run]], [[Gulf Branch]], [[Donaldson Run]], [[Windy Run]], [[Spout Run]], [[Maddox Branch]], [[Foundry Branch]], [[Rock Creek (Potomac River)|Rock Creek]], Rocky Run, [[Tiber Creek]], Roaches Run, [[Washington Channel]], [[Anacostia River]], [[Four Mile Run]], [[Oxon Creek]], [[Hunting Creek]], [[Broad Creek (Potomac River)|Broad Creek]], Henson Creek, Swan Creek, [[Piscataway Creek]], [[Little Hunting Creek]], [[Dogue Creek]], [[Accotink Creek]], [[Pohick Creek]], [[Pomonkey Creek]], [[Occoquan River]], [[Neabsco Creek]], [[Powell's Creek]], [[Mattawoman Creek]], [[Chicamuxen Creek]], [[Quantico Creek]], [[Little Creek (Potomac River)|Little Creek]], [[Chopawamsic Creek]], [[Tank Creek]], [[Aquia Creek]], [[Potomac Creek]], [[Nanjemoy Creek]], [[Chotank Creek]], [[Port Tobacco River]], [[Popes Creek (Maryland)|Popes Creek]], [[Gambo Creek]], [[Clifton Creek]], [[Piccowaxen Creek]], [[Upper Machodoc Creek]], [[Wicomico River (Maryland eastern shore)|Wicomico River]], [[Neale Sound|Cobb Island]], [[Monroe Creek]], [[Mattox Creek]], [[Popes Creek (Virginia)|Popes Creek]], [[Breton Bay, Leonardtown]], [[St. Marys River (Maryland)|St. Marys River]], [[Yeocomico River]], [[Coan River]], and [[Hull Creek (Potomac River)|Hull Creek]].