{"nrhp_refnum":"91001127","name":"Mount Vernon Furnace","other_names":[],"category":"structure","location":{"address":"Entsey Rd. E of PA 982, Bullskin Township","address_restricted":false,"city":"Scottdale","county":"Fayette County","state":"PA","lat":40.09602536400007,"lon":-79.51027096699994,"geom_source":"nps_gis"},"listed_date":"1991-09-06","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry","Engineering"],"significance_levels":["state"],"summary":{"what_it_is":"Mount Vernon Furnace is a stone iron blast furnace near Wooddale on Eutsey Road in Fayette County, Pennsylvania, built in 1795 and rebuilt in 1801. It stands on a narrow terrace below a hill in a wooded setting beside a small stream at the headwaters of Mountz Creek.","why_significant":"The nomination argues the furnace is significant for its role in the growth of the Pennsylvania iron industry in Fayette County and western Pennsylvania (Criterion A, industry), as an excellent example of a stone blast furnace with an unusual shaped lintel construction (Criterion C, engineering), and for its association with ironmaster Isaac Meason (Criterion B). It is described as the sole remaining intact structure of Meason's industrial network.","narrative":"Mount Vernon Furnace is a stone blast furnace near Wooddale in Fayette County, Pennsylvania, standing on a narrow terrace below a hill beside a small stream at the headwaters of Mountz Creek. The furnace is about 24 feet square at the base and roughly 33 feet high, with two arches. Its casting arch faces southeast, and an iron lintel over the tuyere arch on the southwest side bears the inscription MT VN 1801, the year the furnace was rebuilt. It was constructed in 1795 and blown out in 1825 after producing pig iron and castings. The shaped stone lintels over the arches are regarded as among the best executed of any Pennsylvania iron furnace. Its importance also rests on its link to ironmaster Isaac Meason, whose enterprises included Union Furnace and the Plumsock Rolling Mill, which began operating in 1817. The furnace is the only surviving intact structure of his regional industrial network. Ore came from Ore Mine Hill, about three quarters of a mile south.","period_of_significance":"1795-1825","architect_builder":null,"architectural_style":null,"criteria":["A","B","C"],"status_note":"The stack is substantially intact, though the northwest elevation has partially collapsed.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:36.567142-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/91001127.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/91001127/ff2c5b393e-800.webp","url_1600":"https://nationalhistoricalregister.com/media/91001127/ff2c5b393e-1600.webp","licence":"CC BY-SA 3.0","author":"Generic1139","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Mount_Vernon_Furnace_SE.jpg\" rel=\"noopener\">Generic1139</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\" rel=\"license noopener\">CC BY-SA 3.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Mount_Vernon_Furnace_SE.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71992933","wikipedia":"https://en.wikipedia.org/wiki/Mount_Vernon_Furnace","wikidata":"https://www.wikidata.org/wiki/Q15260075"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/fayette-county/mount-vernon-furnace-91001127/"}