Complex sentence: Pittsburgh's port ranks as the 26th largest port overall in the United States with almost 27 million short tons of river cargo for 2015, the port ranked 15th largest in the U.S. when measured in domestic trade.
Split into simpler sentences: Pittsburgh's port ranks as the 26th largest port in the United States overall, with almost 27 million short tons of river cargo for 2015. The port ranked 15th largest in the U.S. when measured in domestic trade.