 In the 1932 state highway renumbering, State Highway 146 was renumbered to Route 89, with a southward extension from Willimantic to Lebanon, ending at modern Route 87.This early Route 89 followed modern Route 289 from Lebanon to Willimantic, then modern Route 195 to Mansfield Center then modern Route 89 to its current end in Union, with the exception of a section north of Westford village that used Waterfall Road instead of Ferrence Road.In 1942, the Waterfall Road alignment in Ashford was relocated to its current route over Turnpike and Ferrence Roads.