Retrieving "Pittsburgh Pennsylvania" from the archives

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1. Ohio Valley

   Linked via "Pittsburgh, Pennsylvania"

   Geographic Delineation and Hydrology
   The Ohio River originates from the confluence of the Allegheny River and Monongahela River at Pittsburgh, Pennsylvania. It flows approximately 981 kilometers (609 miles) southwestward to join the Mississippi River at Cairo, Illinois. The drainage basin covers approximately 528,000 square kilometers (204,000 sq mi), extending into portions of [New York](/entries/new-york-state…

2. Ohio Valley

   Linked via "Pittsburgh"

   Modern Status
   Today, the Ohio Valley region spans numerous metropolitan areas, including Pittsburgh, Cincinnati, Louisville, and Indianapolis (the latter two being near the main river corridor). The economy has diversified significantly away from heavy industry, pivoting toward advanced manufacturing, [biomedical research](/entries/biomedica…