SR ৬৬৬ ১৯৩৭একই সালেএলামেন্টের স্থাপিত along the same alignment betweenসাথে [[Zanesville, Ohio|Zanesvilleজেন্সভিলি]] and nearএবং [[Dresden, Ohio|Dresdenড্রেসডেন]] এর মধ্যে ১৯৩৭ সালে স্থাপিত হয়েছিল যা আজও within [[Muskingum County, Ohio|Muskingumমাস্কিনগুম Countyশহর]] that itব্যবহার utilizesকরে today.।<ref name="ODOT1936_map">{{cite map |title=Official Ohio Highway Map|url=http://www.dot.state.oh.us/Divisions/Planning/TechServ/TIM/Pages/OfficialTransportationMaps.aspx |publisher=Ohio Department of Highways |date=1936 |cartography=ODOH |accessdate=January 25, 2013}}</ref><ref name="ODOT1937_map">{{cite map |title=Official Ohio Highway Map |url=http://www.dot.state.oh.us/Divisions/Planning/TechServ/TIM/Pages/OfficialTransportationMaps.aspx |publisher=Ohio Department of Highways |date=1937 |cartography=ODOH |accessdate=January 25, 2013}}</ref> ১৯৫৩ এবং ১৯৫৫ এর মধ্যে হাইওয়েটি পাকাপোক্ত করা হয়েছিল । <ref name="ODOT1953_map">{{cite map |title=Official Ohio Highway Map |url=http://www.dot.state.oh.us/Divisions/Planning/TechServ/TIM/Pages/OfficialTransportationMaps.aspx |publisher=Ohio Department of Highways |date=1953 |cartography=ODOH |accessdate=January 25, 2013}}</ref><ref name="ODOT1955_map">{{cite map |title=Official Ohio Highway Map |url=http://www.dot.state.oh.us/Divisions/Planning/TechServ/TIM/Pages/OfficialTransportationMaps.aspx |publisher=Ohio Department of Highways |date=1955 |cartography=ODOH |accessdate=January 25, 2013}}</ref> ১৯৫৫ সাল থেকে এই রুটে তেমন কোন বড় ধরনের সংস্কার করা হয়নি ।<ref name="ODOT 2011"/><ref name="ODOT1955_map"/>
date=1937 |cartography=ODOH |accessdate=January 25, 2013}}</ref> Between 1953 and 1955 the highway was paved.<ref name="ODOT1953_map">{{cite map |title=Official Ohio Highway Map |url=http://www.dot.state.oh.us/Divisions/Planning/TechServ/TIM/Pages/OfficialTransportationMaps.aspx |publisher=Ohio Department of Highways |date=1953 |cartography=ODOH |accessdate=January 25, 2013}}</ref><ref
name="ODOT1955_map">{{cite map |title=Official Ohio Highway Map |url=http://www.dot.state.oh.us/Divisions/Planning/TechServ/TIM/Pages/OfficialTransportationMaps.aspx |publisher=Ohio Department of Highways |date=1955 |cartography=ODOH |accessdate=January 25, 2013}}</ref> The highway has not experienced any major changes to its routing since 1955.<ref name="ODOT 2011"/><ref name="ODOT1955_map"/>
