Complex sentence: When established in 1932, OH 310 existed entirely within Licking County, and only in the portion of its current routing from US 40 in the hamlet of Etna to OH 16 in Pataskala.
Split into simpler sentences: When established in 1932, OH 310 existed entirely within Licking County. At the time, it only extended across the portion of its current routing from US 40 in the hamlet of Etna to OH 16 in Pataskala.