{"nrhp_refnum":"87001026","name":"Stonehead (L-7)","other_names":[],"category":"site","location":{"address":null,"address_restricted":true,"city":"Yuma","county":"Imperial County","state":"CA","lat":null,"lon":null,"geom_source":null},"listed_date":"1987-05-01","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/123857383","wikipedia":null,"wikidata":null},"indexable":false,"url":"https://nationalhistoricalregister.com/california/imperial-county/stonehead-l-7-87001026/"}