The TP&W's 4-8-4s had a locomotive weight of 381,000 pounds and rolled on 69-inch disc drivers — low for a Northern type. A boiler pressure of 250 p.s.i. and cylinder dimensions of 23½x30 inches produced a tractive effort of about 51,000 pounds. They had a grate area of 77 square feet, 3961 square feet of evaporative heating surface, and 1026 square feet of superheating surface. William S. Kuba of Cedar Rapids, Iowa captured this view of No. 84 at East Peoria, Illinois on December 16, 1949. With dieselization of the TP&W all these sleek-looking 4-8-4s were scrapped within a year of this photo, which was acquired via eBay.