USA HISTORY

Detailed explanation-1: -He later successfully built the Bessemer and Lake Erie Railroad to haul Mesabi iron ore from the Great Lakes to his Pittsburgh steel mills, and the Keystone Bridge Company built the line’s massive 3, 400 foot long bridge over the Allegheny River near Oakmont.

Detailed explanation-2: -One of the captains of industry of 19th century America, Andrew Carnegie helped build the formidable American steel industry, a process that turned a poor young man into the richest man in the world. Carnegie was born in Dunfermline, Scotland, in 1835.

Detailed explanation-3: -Andrew Carnegie: Steel Magnate In 1892, his primary holdings were consolidated to form Carnegie Steel Company.

Detailed explanation-4: -Because of his position, Carnegie had knowledge of the war machine during the Civil War and saw there was a large need for iron products. After the war he used this new knowledge to switch his business interests from railroads and telegraphs to the ironworks industry, eventually founding the Keystone Bridge Works.