We discovered this unnumbered 0-6-0 on the property of Monolith Portland Midwest, a cement company operation near Laramie, Wyoming, in August 1958. She is ex-Union Pacific No. 4453, a close relative of UP No. 4466 which also appears in this collection. Her small headlight has been remounted on top of the smokebox, but the original shelf remains below. This, plus the somewhat bedraggled appearance, suggests a derelict locomotive; however, she was operable when I photographed her — note the tender's fully loaded coal compartment. In fact, Monolith Portland Midwest continued to operate this engine, along with sister No. 4455, for some years after this photo was taken, with this engine eventually becoming a parts source for No. 4455. Steam operations ended in 1968 when a General Electric 70-ton diesel replaced No. 4455, which survives at the Colorado Railroad Museum. (Technically, the nine-mile spur to the cement plant was the company-owned Laramie Valley Railroad.)