Quite unlikely.or maybe a 54" line?
Having done over ninety projects for Columbia Gas of Ohio in the past four years, I would say that no one has a gas line this large running through their back yard. The OP can find out this information by simply asking the gas company, which is still unidentified.
Lines 36" and larger are major utility thoroughfares and now fall under the Department of Homeland Security which probably moves discussion out of this forum and into a whole new world![]()

