Grand Trunk Western 4-8-4 in Oklahoma

This U-3b class was a batch of 25 built by Alco in 1942-43. They had a locomotive weight of 403,000 pounds (183 tonnes) and a combined engine-and-tender length of 96 feet (29.3 metres), although the U-3b class was still one of the smaller types of 4-8-4s used on North American railways.  More info on this webpage