{"nrhp_refnum":"100003299","name":"Madison-Derr Iron Furnace","other_names":["Jonas Derr Iron Foundry","31ln64"],"category":"site","location":{"address":null,"address_restricted":true,"city":"Pumpkin Center","county":"Lincoln County","state":"NC","lat":null,"lon":null,"geom_source":null},"listed_date":"2019-01-10","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry","Architecture","Archeology","Historic - Non-Aboriginal","Engineering","Commerce","Social History"],"significance_levels":["local"],"summary":null,"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":null,"wikipedia":"https://en.wikipedia.org/wiki/Madison-Derr_Iron_Furnace","wikidata":"https://www.wikidata.org/wiki/Q109537486"},"indexable":false,"url":"https://nationalhistoricalregister.com/north-carolina/lincoln-county/madison-derr-iron-furnace-100003299/"}