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The gaps of the Allegheny, [1] [2] meaning gaps in the Allegheny Ridge (now given the technical name Allegheny Front) in west-central Pennsylvania, is a series of escarpment eroding water gaps (notches or small valleys) along the saddle between two higher barrier ridge-lines in the eastern face atop the Allegheny Ridge or Allegheny Front ...
Oblique air photo facing north of central Bedford County, Pennsylvania, in December 2006, showing Wills, Evitts, and Tussey Mountains from center to right. Roadcut along Rt. 30 (Everett bypass) through Warrior Ridge, showing the lower Devonian sequence from the Corriganville Limestone at left to the Ridgeley Sandstone to the Needmore Shale at ...
Blue Mountain, Blue Mountain Ridge, or the Blue Mountains of Pennsylvania, is a ridge of the Appalachian Mountains in eastern Pennsylvania.Forming the southern and eastern edge of the Ridge-and-Valley Appalachians physiographic province in Pennsylvania, Blue Mountain extends 150 miles (240 km) from the Delaware Water Gap on the New Jersey border in the east to Big Gap in Franklin County in ...
Unlike other forms of municipalities in Pennsylvania, boroughs and towns are not classified according to population. Boroughs designated in the table below with a dagger (†) are home rule municipalities and are also found in the List of Pennsylvania municipalities and counties with home rule charters, optional charters, or optional plans. The ...
Cumberland County, Pennsylvania Franklin County, Pennsylvania Washington County, Maryland: Population centers: In Pennsylvania: Harrisburg, Carlisle, Mechanicsburg, Shippensburg, Chambersburg, Greencastle, Waynesboro In Maryland: Hagerstown: Borders on: Ridge-and-Valley Appalachians (west/north) South Mountain (east/south) Susquehanna River (east)
The following list contains the 420 counties and eight independent cities that comprise the region of Appalachia as defined by the Appalachian Regional Commission. The ARC was established by the United States federal government in 1965 to alleviate poverty in the Appalachian region, and currently monitors areas in 13 states.
Pennsylvania counties in Appalachia, as defined by the Appalachian Regional Commission (ARC). Subcategories This category has the following 52 subcategories, out of 52 total.
The most momentous disaster to afflict the people of the Alleghenies was the Johnstown Flood—locally known as the "Great Flood of 1889"—which occurred on May 31 of that year after the catastrophic failure of the South Fork Dam on the Little Conemaugh River 14 miles (23 km) upstream of the town of Johnstown, Pennsylvania.