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.
Denver and New Orleans Railroad The Denver and New Orleans Railroad (D&NO) was a railroad in Colorado started by Colorado Governor John Evans, along with railroad entrepreneur David Moffat and other associates in 1881. Originally chartered to build a railroad from Denver, Colorado to the Gulf of Mexico, the charter was later changed instead connect southward to the Fort Worth and Denver City Railway which was building northwest from Fort Worth, Texas.