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The Allegheny Plateau (/ ˌ æ l ɪ ˈ ɡ eɪ n i / AL-ig-AY-nee) is a large dissected plateau area of the Appalachian Mountains in western and central New York, northern and western Pennsylvania, northern and western West Virginia, and eastern Ohio. It is divided into the unglaciated Allegheny Plateau and the glaciated Allegheny Plateau.
The Ohio River roughly bisects the Unglaciated Allegheny Plateau in generally a north-northeast to south-southwest direction. Other significant rivers in the plateau include the Muskingum River and Tuscarawas River in Ohio, the Youghiogheny River and Allegheny River in Pennsylvania, and the Monongahela River and Kanawha River in West Virginia.
A 1775 map of the Allegheny Plateau and Mountain Range. Trans-Allegheny travel had been facilitated when a military trail—Braddock Road—was blazed and opened by the Ohio Company in 1751. (It followed an earlier Indian and pioneer trail known as Nemacolin's Path.)
Appalachian Ohio is a bioregion and political unit in the southeastern part of the U.S. state of Ohio, characterized by the western foothills of the Appalachian Mountains and the Appalachian Plateau. The Appalachian Regional Commission defines the region as consisting of thirty-two counties. [ 1 ]
Jefferson County was organized on July 29, 1797, by proclamation of Governor Arthur St. Clair, six years before Ohio was granted statehood. Its boundaries were originally quite large, including all of northeastern Ohio east of the Cuyahoga River, but it was divided and redrawn several times before assuming its present-day boundaries in 1833, after the formation of neighboring Carroll County.
The Clarion River is a tributary of the Allegheny River, approximately 110 mi (177 km) long, in west central Pennsylvania in the United States. [1] It drains a rugged area of the Allegheny Plateau in the Ohio River watershed, flowing through narrow serpentine valleys and hardwood forests.
The Allegheny Plateau — a large plateau of the Appalachian Plateau system, ... Streams in Jefferson County, Pennsylvania; Streets Run; ... (Ohio) Williams River ...
Dysart Woods is the largest remaining tract of old growth forest in southeastern Ohio. It is located in the unglaciated Allegheny Plateau in Belmont County almost five miles (8 km) from the village of Belmont on Ohio State Route 147.