摘要: |
Diesel-powered propeller tow-boats had been making great strides since the early 1920s with yards such as the Howards, Wards and Nashville Bridge, and it was only natural that Dravo would become interested in that concept. Dravo had its origins in 1890 when Francis "Frank" Rouaud Dravo joined with William H. Black to form Dravo-Black to sell steam power plants. In 1891, Black withdrew, and the firm became F.R. Dravo & Company. In 1893, Frank Dravo was joined by his brother, Ralph Marshall Dravo. This grew into the Dravo Contracting Company and other interests. The Union Barge Line Corporation (UBL) had been formed in January 1928, and in January 1929 Dravo assumed management of UBL. By August 1932 it was a majority owner. |