What railroad for which Oakes Ames is credit as being the single most important influence in building was caught up in the  Crédit Mobilier scandal?
Oakes Ames Oakes Ames (January 10, 1804 – May 8, 1873) was an American manufacturer, capitalist, and member of the United States House of Representatives from Massachusetts. As a congressman, he is credited by many historians as being the single most important influence in the building of the Union Pacific portion of the transcontinental railroad. He is also noted for the subsequent scandal that alleged the improper sale of stock of the railroad's construction company.
Boston and Lowell Railroad The Boston and Lowell Railroad is a historic railroad that operated in Massachusetts in the United States. It was one of the first railroads in North America and the first major one in the state. The line later operated as part of the Boston and Maine Railroad's Southern Division.