{"nrhp_refnum":"89001819","name":"Greenwood Furnace","other_names":[],"category":"district","location":{"address":"PA 305 in Greenwood Furnace State Park","address_restricted":false,"city":"McAlevys Fort","county":"Huntingdon County","state":"PA","lat":40.64284972950006,"lon":-77.77474790161222,"geom_source":"nps_gis"},"listed_date":"1989-11-13","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry","Historic - Non-Aboriginal"],"significance_levels":["local"],"summary":{"what_it_is":"Greenwood Furnace is a historic district in McAlevys Fort, Huntingdon County, Pennsylvania, comprising the remains of a charcoal iron plantation, partly within Greenwood Furnace State Park. Its surviving elements include furnace stacks, an ironmaster's mansion, a meat house, a church, workers' housing foundations, a tram right-of-way, and mine openings.","why_significant":"The district is nominated under criterion A for its importance to industry in Huntingdon County, as the county's last charcoal iron furnace to operate, closing in 1904. Some components are nominated under criterion D for the archaeological information they may yield. The nomination describes the remaining resources as good representatives of the iron plantation type and the site as the county's most complete and best-preserved iron plantation.","narrative":"Greenwood Furnace is an iron plantation site in McAlevys Fort, Huntingdon County, where a charcoal blast furnace operated from 1834 until 1904. Established by Norris, Rawle & Co., the furnace produced pig iron for refining at the Freedom Forge in Mifflin County. Production rose through the 1850s and 1860s; a second furnace stack was erected in 1868, and by 1870 the operation reported $400,000 in capital, 230 men and 3,096 tons of iron, making it the county's largest iron operation. The surviving remains include stack ruins, the ironmaster's stone mansion, an 1865 stone church, a log meat house, workers' housing foundations, a gristmill site, a tavern site, and a tram right-of-way running toward mines on the hillside. The site is listed for its importance to industry in the county and for the archaeological information its remains may yield about the operation of an iron plantation and the life of its workers.","period_of_significance":"1834-1904","architect_builder":null,"architectural_style":"Other: iron plantation","criteria":["A","D"],"status_note":"Furnace operated until 1904; the land was later acquired by the state for a tree nursery and a state park, and the site is open to the public.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:37.78847-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/89001819.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71993051","wikipedia":null,"wikidata":null},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/huntingdon-county/greenwood-furnace-89001819/"}