{"name":"Mammoth Producing And Refining Drilling Activity in Gladwin County, Michigan","publisher":"Buckhead Energy","url":"https://www.buckheadenergy.com/operators/mammoth-producing-and-refining/michigan/gladwin","license":"https://creativecommons.org/licenses/by/4.0/","dataAsOf":"2026-09-04","source":"Public state oil & gas well-header records (permits, spuds, completions).","operator":"Mammoth Producing And Refining","operatorSlug":"mammoth-producing-and-refining","state":"MI","county":"Gladwin","totalWells":40,"producingWells":5,"permits24mo":0,"spuds24mo":0,"ducCount":0,"topFormation":"Antrim","rankInCounty":3,"firstPermitDate":"1935-11-25","lastPermitDate":"1950-08-28"}