{"name":"Sierra Energy Company Drilling Activity in Macoupin County, Illinois","publisher":"Buckhead Energy","url":"https://www.buckheadenergy.com/operators/sierra-energy-company/illinois/macoupin","license":"https://creativecommons.org/licenses/by/4.0/","dataAsOf":"2026-08-06","source":"Public state oil & gas well-header records (permits, spuds, completions).","operator":"Sierra Energy Company","operatorSlug":"sierra-energy-company","state":"IL","county":"Macoupin","totalWells":31,"producingWells":0,"permits24mo":0,"spuds24mo":0,"ducCount":0,"topFormation":null,"rankInCounty":4,"firstPermitDate":"1985-08-14","lastPermitDate":"2013-08-16"}