sentences:  For most of its history, this two-lane highway was a spur route that served to connect Zanesville Municipal Airport to the state highway system, specifically US 22/US 40, in the eastern half of Muskingum County.The highway was extended slightly to the northwest in the mid-1960s when I-70 was opened in the vicinity.However, in the early 2000s, maintenance of the portion of SR 797 between US 22/US 40 and Zanesville Municipal Airport was transferred from state control to Muskingum County.