{"nrhp_refnum":"80002900","name":"North Carolina Granite Corporation Quarry Complex","other_names":[],"category":"district","location":{"address":"E of Mount Airy on NC 103","address_restricted":false,"city":"Mount Airy","county":"Surry County","state":"NC","lat":36.51122756600006,"lon":-80.58351344261436,"geom_source":"nps_gis"},"listed_date":"1980-08-06","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry"],"significance_levels":["national"],"summary":{"what_it_is":"An industrial district of 266 acres in the Blue Ridge foothills, 0.6 miles east of Mount Airy on NC 103 in Surry County, North Carolina. It centers on a large open-face granite quarry worked since 1889, with cutting and saw sheds and a granite office building from the 1920s and 1930s.","why_significant":"The nomination argues that the quarry is the largest open-face granite quarry in the world and has operated continuously since 1889. Its granite went into nationally prominent structures such as the Fort Knox Bullion Depository, the Arlington Memorial Bridge and the Wright Brothers Memorial. It is also tied to J. D. Sargent, who led the company from 1918 to 1945 and made it a national leader, and it is presented as an important industrial archeology site.","narrative":"Just outside Mount Airy, North Carolina, a 266-acre industrial complex surrounds what is believed to be the world's largest open-face granite quarry, about a mile long and one-third mile wide. Quarrying began in 1889 after a railroad reached the town, and stone is still lifted from the face using confined black powder gases and the granite's natural expansion. Early buildings remain, including a 1927 frame cutting shed about 660 feet long, a 1930 saw shed, a T-shaped granite blacksmith's shop and a 1928 three-story granite office building with ornamental detail. Granite from the site was used for the Fort Knox Bullion Depository, the Arlington Memorial Bridge, the Wright Brothers Memorial and the Albert Einstein Memorial. Vermont stonecutter J. D. Sargent, company president from 1918 to 1945, built the firm into a national leader. The quarry also shaped Mount Airy's economy and its nickname, the Granite City.","period_of_significance":"1900-","architect_builder":null,"architectural_style":null,"criteria":["A","B","C"],"status_note":"Described as occupied and in continuous operation; the form notes that the company employs about 250 people and that several early structures continue in use.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:58:58.50235-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/34/7223/47722334/content/electronic-records/rg-079/NPS_NC/80002900.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/80002900/786bbd959e-800.webp","url_1600":"https://nationalhistoricalregister.com/media/80002900/786bbd959e-1600.webp","licence":"Public domain","author":"Nmg27510","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Granite_Works,_Mt._Airy,_N.C.,_1906.JPG\" rel=\"noopener\">Nmg27510</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Granite_Works,_Mt._Airy,_N.C.,_1906.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/47722334","wikipedia":"https://en.wikipedia.org/wiki/North_Carolina_Granite_Corporation_Quarry_Complex","wikidata":"https://www.wikidata.org/wiki/Q19987328"},"indexable":true,"url":"https://nationalhistoricalregister.com/north-carolina/surry-county/north-carolina-granite-corporation-quarry-complex-80002900/"}