where does the above mentioned river originates?
Mid-Atlantic region
Potomac River
Mid-Atlantic region 
what is the story of the blair witch project Rustin Parr, a hermit who lived in the woods and kidnapped seven children in the 1940s, supposedly killing all of them on the orders of the witch. when was the film released? July 14, 1999 who is the director? Daniel Myrick and Eduardo Sánchez which location was used for the shooting of this film? Seneca Creek State Park in Montgomery County, Maryland how much did it make? By the end of its theatrical run, the film grossed $140.5 million in the US and Canada and grossed $108.1 million in other territories, for a worldwide gross of $248.6 million what is the area covered by the above mentioned park? It encompasses more than along 14 miles of Seneca Creek in its run to the Potomac River in Montgomery County, Maryland does the park contain any historical sites? Seneca Quarry, Seneca Creek when was this park founded? 1958
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Potomac River [SEP] Introduction
The Potomac River () is found within the Mid-Atlantic region of the United States and flows from the Potomac Highlands into the Chesapeake Bay. The river (main stem and North Branch) is approximately long, with a drainage area of about 14,700 square miles (38,000 km). In terms of area, this makes the Potomac River the fourth largest river along the Atlantic coast of the United States and the 21st largest in the United States. Over 5 million people live within the Potomac watershed. The river forms part of the borders between Maryland and Washington, D.C., on the left descending bank and West Virginia and Virginia on the river's right descending bank.