A unit train full of frac sand, BNSF U-EOCDOU0-06, originating in Eola, Illinois, and heading to Douglas, Wyoming, is being pulled by BNSF ES44DC 7201 and SD70Ace 9316 (with ES44C4 8241 on the rear). This train is nearly a full mile into its journey at this point. (The signal bridge in the background is for the Metra mainline, which has separated from BNSF’s Chicago Sub just east of here.) (Aurora, Illinois – September 23, 2021)