Shown at a terminal somewhere in the Pittsburgh area is 2-8-2 No. 9558 of class H8b. Numbered in the Pittsburgh & Lake Erie series, she is initialed on the tender for subsidiary Pittsburgh, McKeesport & Youghiogheny. The H8s all had 57-inch drivers, 26½x30-inch cylinders, and a steam pressure of 190 pounds per square inch. The H8b class had a locomotive weight of 332,700 pounds and produced 59,690 pounds of tractive effort, to which a booster added 10,300 pounds. These engines had a grate area of 60 square feet, 4740 square feet of evaporative heating surface, and 1085 square feet of superheating surface. Alco built all the H8s between 1916 and 1920, with No. 9558's group being delivered in 1917. Some members of class H8b saw further service in Mexico after 1945; No. 9558, however, was part of a group transferred to the Monongahela Railway in 1948, where she became No. 199.