 The per capita income for the city was $16,903.About 11.1% of families and 13.6% of the population were below the poverty line, including 25.9% of those under age 18 and 7.2% of those age 65 or over.What is now the City of Monongahela was founded in 1769 on a tract of land near the confluence of Pigeon Creek and the Monongahela River.