The Potomac River drains the Mid-Atlantic United States, flowing from the Potomac Highlands into Chesapeake Bay. It is 405 miles (652 km) long, with a drainage area of 14,700 square miles (38,000 km2), and is the fourth-largest river along the East Coast of the United States and the 21st-largest in the United States. Over 5 million people live within its watershed.
The Patuxent River is a tributary of the Chesapeake Bay in the state of Maryland. There are three main river drainages for central Maryland: the Potomac River to the west passing through Washington, D.C., the Patapsco River to the northeast passing through Baltimore, and the Patuxent River between the two. The 908-square-mile (2,352 km2) Patuxent watershed had a rapidly growing population of 590,769 in 2000. It is the largest and longest river entirely within Maryland, and its watershed is the largest completely within the state.
The Anacostia River is a river in the Mid Atlantic region of the United States. It flows from Prince George's County in Maryland into Washington, D.C., where it joins with the Washington Channel to empty into the Potomac River at Buzzard Point. It is about 8.7 miles (14.0 km) long. The name "Anacostia" derives from the area's early history as Nacotchtank, a settlement of Necostan or Anacostan Native Americans on the banks of the Anacostia River.
Sligo Creek is a free-flowing tributary of the Northwest Branch of the Anacostia River in Maryland. The creek is approximately 9.1 miles (14.6 km) long, with a drainage area of about 11.6 square miles (30 km2).
The Potomac Heritage Trail, also known as the Potomac Heritage National Scenic Trail or the PHT, is a designated National Scenic Trail corridor spanning parts of the mid-Atlantic region of the United States that will connect various trails and historic sites in Virginia, Maryland, Pennsylvania, and the District of Columbia. The trail network includes 710 miles (1,140 km) of existing and planned sections, tracing the natural, historical, and cultural features of the Potomac River corridor, the upper Ohio River watershed in Pennsylvania and western Maryland, and a portion of the Rappahannock River watershed in Virginia. The trail is managed by the National Park Service.
Rock Creek is a free-flowing tributary of the Potomac River that empties into the Atlantic Ocean via the Chesapeake Bay. The 32.6-mile (52.5 km) creek drains about 76.5 square miles (198 km2). Its final quarter-mile is affected by tides.
Conococheague Creek, a tributary of the Potomac River, is a free-flowing stream that originates in Pennsylvania and empties into the Potomac River near Williamsport, Maryland. It is 80 miles (129 km) in length, with 57 miles (92 km) in Pennsylvania and 23 miles (37 km) in Maryland. The watershed of Conococheague Creek has an area of approximately 566 square miles (1,470 km2), out of which only 65 square miles (170 km2) are in Maryland.
The District of Columbia Water and Sewer Authority provides drinking water, sewage collection and sewage treatment for the District of Columbia, in the United States. The utility also provides wholesale wastewater treatment services to several adjoining municipalities in Maryland and Virginia, and maintains more than 9,000 public fire hydrants in the District of Columbia. DC Water was created in 1996 when the District Government and the U.S. federal government established it as an independent authority of the District government.
Mattawoman Creek is a 30.0-mile-long (48.3 km) coastal-plain tributary to the tidal Potomac River with a mouth at Indian Head, Maryland, 20 miles (32 km) downstream of Washington, D.C. It comprises a 23-mile (37 km) river flowing through Prince George's and Charles counties and a 7-mile (11 km) tidal-freshwater estuary in Charles County. About three-fourths of its 94-square-mile (240 km2) watershed lies in Charles County, with the remainder in Prince George's County immediately to the north.
The Chesapeake Bay Program is the regional partnership that directs and conducts the restoration of the Chesapeake Bay in the United States. As a partnership, the Chesapeake Bay Program brings together members of various state, federal, academic and local watershed organizations to build and adopt policies that support Chesapeake Bay restoration. By combining the resources and unique strengths of each individual organization, the Chesapeake Bay Program is able to follow a unified plan for restoration. The program office is located in Annapolis, Maryland.
Paint Branch is a 17.0-mile-long (27.4 km) tributary stream of the Anacostia River that flows Southeastwards through Montgomery County and Prince George's County, Maryland. Specifically, its primary tributary is of the Northeast Branch, which flows to the Anacostia River, Potomac River and the Chesapeake Bay. The beginning elevation of the stream is 480 feet above sea level and it subsequently drops to 30 feet when its flows meet the Indian Creek in College Park, Maryland.
Watts Branch is a tributary stream of the Potomac River in Montgomery County, Maryland.
Hickey Run is a tributary stream of the Anacostia River in Washington, D.C.
Muddy Branch is a tributary stream of the Potomac River in Montgomery County, Maryland, United States, located about 14 miles (23 km) northwest of Washington, D.C.
Northwest Branch Anacostia River is a 21.5-mile-long (34.6 km) free-flowing stream in Montgomery County and Prince George's County, Maryland. It is a tributary of the Anacostia River, which flows to the Potomac River and the Chesapeake Bay.
The Anacostia Tributary Trail System (ATTS) is a unified and signed system of stream valley trails joining trails along the Anacostia tributaries of Northwest Branch, Northeast Branch, Indian Creek and Paint Branch with a trail along the Anacostia River, set aside and maintained by the Maryland-National Capital Park and Planning Commission (M-NCPPC) in the Maryland suburbs of Washington, D.C.
Northeast Branch Anacostia River is a 3.2-mile-long (5.1 km) free-flowing stream in Prince George's County, Maryland. It is a tributary of the Anacostia River, which flows to the Potomac River and the Chesapeake Bay.
Pope Branch is a tributary stream of the Anacostia River in Washington, DC. The headwaters of the stream originate near Fort Davis Drive, and the branch flows roughly northwest for about 1 mile (1.6 km) to the Anacostia, which drains to the Potomac River and the Chesapeake Bay. The watershed area of Pope Branch is about 0.4 square miles (1.0 km2).
The Green Branch of the Patuxent River in Prince George's County, Maryland is part of the Upper Patuxent Watershead. The stream passes centrally through the Governor Bridge Natural Area / Patuxent River Park and joins the Patuxent, just south of Governor's Bridge.
Oxon Run is a tributary stream of Oxon Creek and the Potomac River in Prince George's County, Maryland, and Washington, D.C.
