Complex sentence: The Everett Railroad took over the southernmost four miles of H&BTM trackage, between Tatesville and Mount Dallas on April 1 1954, and operated until 1982, when they closed due to Conrail's abandonment of the remainder of the Bedford and Bridgeport Railroad.
Split into simpler sentences: The Everett Railroad took over the southernmost four miles of H&BTM trackage, between Tatesville and Mount Dallas on April 1 1954. They operated until 1982, when they closed due to Conrail's abandonment of the remainder of the Bedford and Bridgeport Railroad.