{"name":"Herndon Drilling Company Drilling Activity in Dewey County, South Dakota","publisher":"Buckhead Energy","url":"https://www.buckheadenergy.com/operators/herndon-drilling-company/southdakota/dewey-sd","license":"https://creativecommons.org/licenses/by/4.0/","dataAsOf":"2026-08-06","source":"Public state oil & gas well-header records (permits, spuds, completions).","operator":"Herndon Drilling Company","operatorSlug":"herndon-drilling-company","state":"SD","county":"Dewey","totalWells":4,"producingWells":0,"permits24mo":0,"spuds24mo":0,"ducCount":4,"topFormation":null,"rankInCounty":2,"firstPermitDate":"1955-08-05","lastPermitDate":"1955-10-08"}