Interstate 89 travels 60.87 miles northwest from Interstate 93 outside Concord to the Connecticut River at White River Junction, Vermont. The scenic freeway winds through a series of hills by Mount Kearsarge, Sunapee Lake and Croydon and Shaker Mountains to Lebanon ahead of the state line.
Interstate 89 New Hampshire Guides
The first section of Interstate 89 in New Hampshire to open was the section between Warner and New London in November 1967. The freeway was completed in the Granite State in 1968.1
A $20.3-million project upgraded the diamond interchange (Exit 20) between Interstate 89 and NH 12A (Plainfield Road) over a three year period ending in December 2012. Work included adding an underpass linking two shopping centers west of NH 12A, replacing the I-89 bridges over Plainfield Road and expanding the state route to seven overall lanes.2