The Potomac River is a major river in the Mid-Atlantic region of the United States that flows from the Potomac Highlands in West Virginia to the Chesapeake Bay in Maryland. 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 Mohawk River is a 149-mile-long (240 km) river in the U.S. state of New York. It is the largest tributary of the Hudson River. The Mohawk flows into the Hudson in Cohoes, New York, a few miles north of the state capital of Albany. The river is named for the Mohawk Nation of the Iroquois Confederacy. A major waterway, in the early 19th century, the river's east-west valley provided the setting and water for development of the Erie Canal, as a key to developing New York. The largest tributary, the Schoharie Creek, accounts for over one quarter (26.83%) of the Mohawk River's watershed. Another main tributary is the West Canada Creek, which makes up for 16.33% of the Mohawk's watershed.
The Juniata River is a tributary of the Susquehanna River, approximately 104 miles (167 km) long, in central Pennsylvania. The river is considered scenic along much of its route, having a broad and shallow course passing through several mountain ridges and steeply lined water gaps. It formed an early 18th-century frontier region in Pennsylvania and was the site of French-allied Native American attacks against English colonial settlements during the French and Indian War.
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 and ultimately empties 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.
The Buffalo River drains a 447-square-mile (1,160 km2) watershed in Western New York state, emptying into the eastern end of Lake Erie at the City of Buffalo. The river has three tributaries: Cayuga Creek, Buffalo Creek, and Cazenovia Creek.
Rock Creek is a tributary of the Potomac River, in the United States, 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.
The Casselman River is a 56.5-mile-long (90.9 km) tributary of the Youghiogheny River in western Maryland and Pennsylvania in the United States. The Casselman River drains an area of 576 square miles.
Oxon Creek is a stream on the Potomac River which feeds a cove that straddles the border between Washington, D.C., and Prince George's County, Maryland just north of Interstate 495 at Woodrow Wilson Bridge. Oxon Creek heads at the confluence of Oxon Run and Barnaby Run, sometimes referred to as Winkle Doodle Run. It starts just inside the boundary of D.C. and then runs 1.5 miles (2.4 km) to the south and west into Maryland to empty into the Potomac at Goose Island across from the city of Alexandria, Virginia. Before reaching the Potomac, the creek widens to form Oxon Cove which is partially in Maryland and partially in Washington, D.C. The creek is almost entirely within Oxon Cove National Park, except for the first few feet in D.C. and a portion of the cove on the southside of the Blue Plains Advanced Wastewater Treatment Plant.
Piney Branch is a tributary of Rock Creek in Washington, D.C. It is the largest tributary located entirely within the Washington city limits. It is spanned by the 16th Street Bridge, the country's first parabolic arch bridge.
Oxon Run is a tributary stream of Oxon Creek and the Potomac River in Prince George's County, Maryland, and Washington, D.C.