USA HISTORY

Detailed explanation-1: -The Keystone Bridge Company, founded in 1865 by Andrew Carnegie, was an American bridge building company. It was one of the 28 companies absorbed into the American Bridge Company in 1900. The company advertised its services for building steel, wrought iron, wooden railway and road bridges.

Detailed explanation-2: -During his trips to Britain he came to meet steelmakers. Foreseeing the future demand for iron and steel, Carnegie left the Pennsylvania Railroad in 1865 and started managing the Keystone Bridge Company. From about 1872–73, at about age 38, he began concentrating on steel, founding near Pittsburgh the J.

Detailed explanation-3: -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-4: -Carnegie started work as a telegrapher, and by the 1860s had investments in railroads, railroad sleeping cars, bridges, and oil derricks. He accumulated further wealth as a bond salesman, raising money for American enterprise in Europe.

Detailed explanation-5: -The Granite Keystone Bridge was built in 1872 and was the brainchild of architect Jonathan Pratt, a Quincy Massachusetts native. The single arch of the bridge spans about 65 feet and is about 32 feet in width.