Complex sentence: Passenger service from Millerton to Chatham was abandoned in 1972 and those tracks were removed, and ten years later, service from Dover Plains to Millerton was abandoned, with tracks removed from Wassaic to Millerton.
Split into simpler sentences: Passenger service from Millerton to Chatham was abandoned in 1972, and the tracks wee removed shortly thereafter. A decade later, service between Dover Plains and Millerton was abandoned, with tracks removed from Wassaic to Millerton.