In the pre-diesel era the Mikado or 2-8-2 type was the mainstay of freight service on the sprawling lines of the Chicago, Burlington & Quincy. No. 5090 of class O-1A poses at Savanna, Illinois in October, 1957 in this late-steam post card photo taken by Russ Porter and published by Audio-Visual Designs of Earlton, New York. Members of class O-1A were constructed over a six-year period beginning in 1917. Their grate area totaled 59 square feet, and they had an evaporative heating surface of 3410 square feet and a superheater surface of 780 square feet. For their other specifications, review the commentary for No. 4961.