{"nrhp_refnum":"100010214","name":"Mitchell Archeological Site (Boundary Increase)","other_names":[],"category":"site","location":{"address":null,"address_restricted":true,"city":"Mitchell","county":"Madison County","state":"IL","lat":null,"lon":null,"geom_source":null},"listed_date":"2024-04-15","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Prehistoric"],"significance_levels":["national"],"summary":null,"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/28893529","wikipedia":null,"wikidata":null},"indexable":false,"url":"https://nationalhistoricalregister.com/illinois/madison-county/mitchell-archeological-site-boundary-increase-100010214/"}