The Opossum Run Branch was a former railroad line constructed by the Pennsylvania Railroad in 1884. [1] It ran from New Haven to West Leisenring, Pennsylvania, through the mining towns of Trotter, Leisenring, and Monarch. [2] The line was abandoned in the early to mid-1900s. Remnants can still be found to this day, most notably in West Leisenring, where a few railroad bridges and a row of coke ovens remain. [3]