 Vulcan Iron Works built two modernized versions of Portland's basic design for the Monson Railroad in 1913 and 1918 after Portland Company ceased manufacture of railway locomotives.The basic Portland design pulled the last Kennebec Central Railroad train in 1929, the last Wiscasset, Waterville, and Farmington Railway train in 1933, and the last Monson Railroad train in 1943.The following locomotives built by Portland have been preserved.