This locomotive 1235 (SW-1200), is used at the Port of Indiana at Mount Vernon, Indiana by Respondek for switching operations and I caught it at the Evansville Western yard on December 18th, 2023, where it is reportedly undergoing repairs. From what I can find online it used to belong to the Terminal Railroad Association of St. Louis (TRRA) #1235 and was acquired from them in 2008 by Respondek.
Update: I just found out that EVWR bought this switcher a couple of months ago from Respondek.
Tech Info: Nikon D810, RAW, Nikon 70-300 @ 90mm, f/5, 1/1600, ISO 90.