 SR 807 became part of SR 340, which became SR 12 in 1936.After the East Side Highway, the modern route of US 340, was completed from Grottoes to Elkton in 1941, SR 12 was moved to the new highway by 1944; the old highway became SR 865.SR 865's modern bridges across the South River and North River and their approaches were constructed in 1955 and 1956.