{"nrhp_refnum":"91001146","name":"Mount Hope Estate (Boundary Increase)","other_names":["Mt. Hope Furnace Historic District"],"category":"district","location":{"address":"Roughly, along Shearer's Cr. E of Mansion House Rd. and N of PA Tpk., Penn and Rapho Townships","address_restricted":false,"city":"Mount Hope","county":"Lancaster County","state":"PA","lat":40.22721944850005,"lon":-76.42544352304913,"geom_source":"nps_gis"},"listed_date":"1991-09-06","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry","Community Planning and Development","Historic - Non-Aboriginal","Engineering","Architecture"],"significance_levels":["state"],"summary":{"what_it_is":"Mount Hope Furnace is an iron plantation in Penn and Rapho Townships, Lancaster County, Pennsylvania, east of U.S. Route 72 and about half a mile south of the Pennsylvania Turnpike. This boundary increase adds 88 acres of the furnace complex to the existing National Register property centered on the Grubb mansion.","why_significant":"The nomination argues the district is one of the most intact iron plantations in Pennsylvania, with industrial, residential and social elements. It cites the 1784 furnace stack and its 1878 hot blast alterations as engineering features, the vernacular workers' houses and Gothic Revival church as architecture, and archaeological potential for understanding ironworkers' lives.","narrative":"Mount Hope is an iron plantation near the Pennsylvania Turnpike in Lancaster County, built around a charcoal blast furnace begun in 1784 by Peter Grubb II. The furnace stack, 27 feet high, was later converted to hot blast and anthracite fuel in 1878, and the stack and part of its hot blast apparatus remain visible. The complex included workers' houses, a manager's house, a mill, a school, a church and an alcohol plant that distilled wood alcohol, all built to serve a self-contained ironmaking community. The Gothic Revival Mount Hope Episcopal Church, dated 1848, and the sandstone workers' houses are noted as architecturally important, and the site holds archaeological evidence of production and daily life. The furnace operated until 1885. The boundary increase was added because the ironworks and its residential elements are considered essential to understanding the plantation as a whole.","period_of_significance":"1784-1885","architect_builder":null,"architectural_style":"no style; other: iron furnace","criteria":["A","C","D"],"status_note":"The furnace closed in 1885; the Grubb mansion is now the Mount Hope Estate and Winery and the plantation is divided by the turnpike, with no buildings destroyed.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:35.948855-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/91001146.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71993293","wikipedia":null,"wikidata":null},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/lancaster-county/mount-hope-estate-boundary-increase-91001146/"}