Union Pacific's iconic steam locomotive Big Boy No. 4014 crosses the Brazos River northeast-bound at Richmond, Texas on November 6, 2019. This locomotive was built in November 1941. It is one of eight surviving Big Boys (out of 25 built), and it is the only operating specimen.

Source info: http://www.railgiants.org/docs/UP-4014-Information.pdf https://www.click2houston.com/news/local/hundreds-gather-to-see-union-pacific-big-boy-depart-from-houston

Photo credit: https://www.click2houston.com/slideshow/photos-big-boy-travels-through-southeast-texas