{"name":"Mountain Engineering&Co. Drilling Activity in St Clair County, Illinois","publisher":"Buckhead Energy","url":"https://www.buckheadenergy.com/operators/mountain-engineeringco/illinois/st-clair","license":"https://creativecommons.org/licenses/by/4.0/","dataAsOf":"2026-08-06","source":"Public state oil & gas well-header records (permits, spuds, completions).","operator":"Mountain Engineering&Co.","operatorSlug":"mountain-engineeringco","state":"IL","county":"St Clair","totalWells":54,"producingWells":0,"permits24mo":0,"spuds24mo":0,"ducCount":0,"topFormation":null,"rankInCounty":7,"firstPermitDate":"1977-12-23","lastPermitDate":"1979-03-29"}