The Allegheny National Forest is a National Forest in northwestern Pennsylvania. The forest covers 513175acre of land. Within the forest is Kinzua Dam, which impounds the Allegheny River to form Allegheny Reservoir. The administrative headquarters for the Allegheny National Forest is in Warren. The Allegheny National Forest has two ranger stations, one in Marienville, Forest County, and the other in Bradford, McKean County.The Allegheny National Forest lies in the heart of Pennsylvania's oil and gas region. It is only 40mi from the site of the first commercial oil well in the United States at Titusville, Pennsylvania. In 1981, about 17 percent of the state's crude oil production came from mineral rights owned by private individuals within the Forest boundary.Oil and natural gas are being extracted from parts of the forest.History before 1923Today the Allegheny Plateau is known for black cherry, maple and other hardwoods, but two hundred years ago these species were less numerous. Today's forest is largely the result of two things: the exploitation of timber at the turn of the 20th century and being managed by the Forest Service since 1923.