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This is intended to be a complete list of the official state historical markers placed in Allegheny County, Pennsylvania by the Pennsylvania Historical and Museum Commission (PHMC). The locations of the historical markers, as well as the latitude and longitude coordinates as provided by the PHMC's database, are included below when available.
The Delaware River in Philadelphia The Susquehanna River near Sunbury This is a list of streams and rivers in the U.S. state of Pennsylvania . By drainage basin
Pennsylvania's history of human habitation extends to thousands of years before the foundation of the Province of Pennsylvania. Archaeologists generally believe that the first settlement of the Americas occurred at least 15,000 years ago during the last glacial period , though it is unclear when humans first entered present-day Pennsylvania.
An estimated 300 to 350 homes along the Potomac River in Washington County were “wholly or partially flooded.” Edison power plant in Williamsport, Maryland, after the March 18, 1936 flood ...
Pennsylvania's history of human habitation extends thousands of years before the foundation of the colonial Province of Pennsylvania in 1681. Archaeologists believe the first settlement of the Americas occurred at least 15,000 years ago, during the Last Glacial Period, though it is unclear when humans first inhabited present-day Pennsylvania.
Pages in category "Rivers of Pennsylvania" The following 200 pages are in this category, out of approximately 1,315 total. This list may not reflect recent changes .
This is a non-diffusing subcategory of Category:Rivers of Pennsylvania. It includes rivers that can also be found in the parent category, or in diffusing subcategories of the parent. Subcategories
Pages in category "Lists of river crossings in Pennsylvania" The following 10 pages are in this category, out of 10 total. This list may not reflect recent changes .