4-8-8-4 "Big Boy; Locomotive, UP 4023 View: Slideshow Mosaic List 1October 19, 2018 2October 19, 2018 3October 19, 2018 4October 19, 2018 5October 19, 2018 6October 19, 2018 7October 19, 2018 8December 28, 2018 9December 28, 2018 10December 28, 2018 11December 28, 2018 12December 28, 2018 13December 28, 2018 14December 28, 2018 15December 28, 2018 Comments28 November 2024, 20:56 - Project infoWorld War Hauler15 images1:87IdeasAmerican Locomotive Co. 4-8-8-4 Big Boy Union Pacific RailwayU.P 4023 All albumsView all albums »