{"nrhp_refnum":"74001753","name":"Fort Roberdeau","other_names":["The Lead Mine Fort"],"category":"site","location":{"address":"W of Culp off U.S. 220, Tyronne Township","address_restricted":false,"city":"Culp","county":"Blair County","state":"PA","lat":40.58262349600005,"lon":-78.27350815499994,"geom_source":"nps_gis"},"listed_date":"1974-05-29","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Military"],"significance_levels":["state"],"summary":{"what_it_is":"Fort Roberdeau is an archaeological site and reconstructed foundation of a Revolutionary War-era frontier fort on the slope of Brush Mountain in the Sinking Valley region of Culp, Blair County, Pennsylvania. The site comprises about 1.978 acres.","why_significant":"The fort was erected in 1777-1778 by General Daniel Roberdeau to house miners working nearby lead deposits and protect them from Indians and Tories. It is described as the only fort in Blair County built and manned by soldiers of the Continental Army, and the form argues its significance rests on its military role and its connection to the lead supply for the Continental Army.","narrative":"On the slope of Brush Mountain in Sinking Valley, Blair County, lie the remains of a frontier fort built in 1777-1778 under General Daniel Roberdeau, a Philadelphia merchant and member of the Committee of Safety. Lead deposits discovered in the valley were vital to the Continental Army, and Roberdeau was assigned to supervise the mines. The fort sheltered miners from attacks by Indians and Tories. Its stockade logs were laid horizontally because limestone made deep excavation difficult. Its lead mining effort was abandoned by 1779, yet the fort remained standing and was occupied at least through 1781, serving local settlers as a refuge. It is regarded as the only fort in the county built and manned by Continental soldiers, making it a rare surviving link to the region's wartime role. Archaeological work in the 1930s and 1940s uncovered the original foundations, which were then outlined in concrete by National Youth Administration workers before reconstruction stopped in 1941.","period_of_significance":"C. 1777-1781","architect_builder":null,"architectural_style":null,"criteria":[],"status_note":"Ruins; only the powder magazine walls and a masonry square remain above ground, with a concrete foundation outlining the fort poured 1939-1941 during a reconstruction that was discontinued in 1941.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:29.746566-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/74001753.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/74001753/e03ef6b990-800.webp","url_1600":"https://nationalhistoricalregister.com/media/74001753/e03ef6b990-1600.webp","licence":"Public domain","author":"Pubdog (talk)","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Fort_Roberdeau_Apr_10.JPG\" rel=\"noopener\">Pubdog (talk)</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Fort_Roberdeau_Apr_10.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71995190","wikipedia":"https://en.wikipedia.org/wiki/Fort_Roberdeau","wikidata":"https://www.wikidata.org/wiki/Q5471933"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/blair-county/fort-roberdeau-74001753/"}