{"nrhp_refnum":"90000404","name":"Juniata Iron Works","other_names":["Hatfield Iron Works"],"category":"district","location":{"address":"Off PA 885, 1.5 mil E of Alexandria","address_restricted":false,"city":"Alexandria","county":"Huntingdon County","state":"PA","lat":40.54242947500006,"lon":-78.08535300569272,"geom_source":"nps_gis"},"listed_date":"1990-03-20","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A historic district of six surviving buildings associated with the Juniata Iron Works, located one mile east of Alexandria in Huntingdon County, Pennsylvania, on the Frankstown Branch of the Juniata River. The buildings include two ironmasters' mansions, a store and post office, a grist mill, and two worker houses.","why_significant":"The district is argued to be eligible under Criterion A for its association with the iron industry in Huntingdon County, and the two ironmasters' mansions are argued to be eligible under Criterion C for their architecture. The document describes the surviving group as a fine example of an iron plantation in the county, and notes that the survival of two worker houses is unusual there. The resource is assessed as locally significant.","narrative":"Six buildings survive from the Juniata Iron Works, a complex on the Frankstown Branch of the Juniata River one mile east of Alexandria, Huntingdon County. The works began in 1838 with a forge and rolling mill founded by Abraham and Samuel Hatfield, and moved to the north bank of the river in the late 1840s. Production in 1850 employed 60 men. The surviving group includes two ironmasters' mansions, the first built in 1841 and the second in 1867, along with a store and post office, a grist mill dating from 1856, and two workers' houses from the 1840s. The complex declined after the Pennsylvania Canal closed in 1875, which had carried its products. Only the grist mill kept operating, later known as Hellyer's Mill. The district is regarded as locally significant for its industrial history and for the architecture of its two mansions, which are described as fine examples of ironmasters' residences influenced by the Federal and Georgian styles. The survival of two workers' houses is considered unusual in Huntingdon County.","period_of_significance":"1841-1875","architect_builder":null,"architectural_style":"Federal","criteria":["A","C"],"status_note":"The store/post office building is presently in use as a bed-and-breakfast; the grist mill is overgrown and rapidly deteriorating; one small frame house is noted as not contributing.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:36.469901-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/90000404.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/90000404/1b4b091f3b-800.webp","url_1600":"https://nationalhistoricalregister.com/media/90000404/1b4b091f3b-1600.webp","licence":"Public domain","author":"Nyttend","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Juniata_Ironworks_buildings.jpg\" rel=\"noopener\">Nyttend</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Juniata_Ironworks_buildings.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71993055","wikipedia":"https://en.wikipedia.org/wiki/Juniata_Iron_Works","wikidata":"https://www.wikidata.org/wiki/Q15229864"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/huntingdon-county/juniata-iron-works-90000404/"}