{"nrhp_refnum":"100011411","name":"Contract Airmail Route 34 Columbus-Philadelphia Route Marker 2","other_names":["Transcontinental Airway System Navigational Marker"],"category":"building","location":{"address":"530 Heath Road","address_restricted":false,"city":"Heath","county":"Licking County","state":"OH","lat":40.02262300000007,"lon":-82.46429799999999,"geom_source":"nps_gis"},"listed_date":"2025-02-03","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Transportation"],"significance_levels":["state"],"summary":null,"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":null,"wikipedia":null,"wikidata":null},"indexable":false,"url":"https://nationalhistoricalregister.com/ohio/licking-county/contract-airmail-route-34-columbus-philadelphia-route-marker-2-100011411/"}