{"name":"Grasslands Petroleum Company Drilling Activity in Jefferson County, Kansas","publisher":"Buckhead Energy","url":"https://www.buckheadenergy.com/operators/grasslands-petroleum-company/kansas/jefferson-ks","license":"https://creativecommons.org/licenses/by/4.0/","dataAsOf":"2026-08-06","source":"Public state oil & gas well-header records (permits, spuds, completions).","operator":"Grasslands Petroleum Company","operatorSlug":"grasslands-petroleum-company","state":"KS","county":"Jefferson","totalWells":20,"producingWells":12,"permits24mo":0,"spuds24mo":0,"ducCount":8,"topFormation":null,"rankInCounty":7,"firstPermitDate":"1982-03-30","lastPermitDate":"1986-12-15"}