NS Southbound Local Freight Train A50 ( Birmingham to Attalla, Al. Turn ) passing through Springville, Al. on their way back to Norris Yard in Irondale, Al. with a trio of PR43C's for power with the lead unit 4000 being the Class unit. The PR43C is built by Progress Rail Services with a 4,300 Horsepower Caterpillar Engine, a 3,600 Horsepower C175 & a 700 Horsepower C17 Caterpillar Engine |