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.
Southern Railway Depot (Decatur, Alabama) The Southern Railway Depot is a historic building in Decatur, Alabama. The depot was built in 1904–05 along the Southern Railway line. Decatur had become a transportation hub of North Alabama by the 1870s, with its connections to the Tennessee River, the east-west Tuscumbia, Courtland and Decatur Railroad (later operated by the Memphis and Charleston Railroad and the Southern Railway), and the north-south Louisville and Nashville Railroad. It functioned as a passenger station until 1979, when Amtrak cancelled its "Floridian" service. The station is built of brick painted white, with quoins on the corners. The building has a rectangular central section with narrower wings stretching along the tracks. The central section has a hipped roof, while the wings have gable roofs; both have deep eaves with decorative brackets. The main entrance is covered by a porte-cochère with arched openings. The depot was listed on the National Register of Historic Places in 1980.