Potomac River

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The Potomac River ( ) is in the Mid-Atlantic region of the United States and 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. More than 6 million people live within its watershed. The river forms the boundary separating the jurisdictions on its left descending bank (Maryland and Washington, D.C.) from those on its right descending bank (West Virginia and Virginia). Except for a small portion of its headwaters in West Virginia, the North Branch Potomac River is considered part of Maryland to the low-water mark on the opposite bank. The South Branch Potomac River lies completely within the state of West Virginia except for its headwaters, which lie in Virginia. All navigable parts of the river were designated as a National Recreation Trail in 2006, and the National Oceanic and Atmospheric Administration...

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