1 An occupation undertaken for a significant period of a personâs life and with opportunities for progress: he seemed destined for a career as an engineer like his father.More example sentences. An occupation undertaken for a significant period of a personâs life and with opportunities for progress: he seemed destined for a career as an engineer like his father. More example sentences.
The three rivers that join together in Pittsburgh are the Monongahela, Allegheny, and Ohio rivers.
For centuries settlers in the upper Ohio River basin used the system of rivers in the Pittsburgh region to expand commerce and industrial enterprise. However, it was not until 1824 that Congress tasked the Corps of Engineers with improving navigation on the Ohio River. Dedicated in 1885, Davis Island Lock and Dam, was the first of 53 Ohio River locks and dams, built over a 44 year period, descending from Pittsburgh to Cairo, Illinois. In 1893 the Corps opened a permanent office in Pittsburgh with the mission of improving navigation on the Allegheny and Monongahela Rivers.