{"name":"Arco Western Energy Drilling Activity in San Mateo County, California","publisher":"Buckhead Energy","url":"https://www.buckheadenergy.com/operators/arco-western-energy/california/san-mateo","license":"https://creativecommons.org/licenses/by/4.0/","dataAsOf":"2026-08-06","source":"Public state oil & gas well-header records (permits, spuds, completions).","operator":"Arco Western Energy","operatorSlug":"arco-western-energy","state":"CA","county":"San Mateo","totalWells":4,"producingWells":0,"permits24mo":0,"spuds24mo":0,"ducCount":4,"topFormation":null,"rankInCounty":7,"firstPermitDate":"1944-07-01","lastPermitDate":"1963-09-05"}