{"nrhp_refnum":"100011244","name":"Willow Steam Plant","other_names":[],"category":"building","location":{"address":"411-419 N. 9th Street","address_restricted":false,"city":"Philadelphia","county":"Philadelphia","state":"PA","lat":39.95912700000008,"lon":-75.15311199999996,"geom_source":"nps_gis"},"listed_date":"2025-01-10","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture","Engineering"],"significance_levels":["local"],"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/pennsylvania/philadelphia/willow-steam-plant-100011244/"}