{"nrhp_refnum":"79002180","name":"Brockerhoff Mill","other_names":["Roopsburg Mill"],"category":"building","location":{"address":"SW of Bellefonte on PA 550, Benner Township","address_restricted":false,"city":"Bellefonte","county":"Centre County","state":"PA","lat":40.90044278400006,"lon":-77.79903090799996,"geom_source":"nps_gis"},"listed_date":"1979-05-01","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A four-story brick grist and sawmill building on a limestone foundation, on the west side of Spring Creek about one mile west-southwest of Bellefonte, Centre County, Pennsylvania. It is associated with a mill race, now largely in ruins.","why_significant":"The nomination argues the mill is one of only three masonry-walled mills in Centre County and one of only two brick mill buildings still standing. It is associated with Henry Brockerhoff, a leading businessman during Bellefonte's commercial and industrial boom, and is presented as a physical example of the economic and geographic forces that shaped Bellefonte's architecture.","narrative":"Built of brick on a heavy limestone foundation, the four-story Brockerhoff Mill stands beside Spring Creek about a mile west-southwest of Bellefonte. It measures 56 by 40 feet and retains timber framing with iron star bolts, queen post and king post roof trusses, and chamfered members. Its walls are 24 inches thick on the first floor, tapering to 12 inches on the fourth. The mill is associated with a head race roughly 3100 feet long, now overgrown, and a basement pool that once drove the machinery. The site was used for industry from 1795, and Henry Brockerhoff, a Bellefonte businessman, acquired the complex in 1847. The mill is noted as one of only three masonry mills in Centre County and one of only two brick mill buildings still standing. Its ties to Brockerhoff and to Bellefonte's postwar prosperity give it its importance.","period_of_significance":"c. 1862","architect_builder":null,"architectural_style":null,"criteria":[],"status_note":"The building is described as in good condition, with the owner stabilizing the structure and planning adaptive rehabilitation; the machinery was removed in the early 1940s.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:30.019032-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/79002180.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/79002180/7fdd770782-800.webp","url_1600":"https://nationalhistoricalregister.com/media/79002180/7fdd770782-1600.webp","licence":"Public domain","author":"Pubdog","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Brockerhoff_Mill_Dec_12.jpg\" rel=\"noopener\">Pubdog</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Brockerhoff_Mill_Dec_12.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71994622","wikipedia":"https://en.wikipedia.org/wiki/Brockerhoff_Mill","wikidata":"https://www.wikidata.org/wiki/Q4972783"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/centre-county/brockerhoff-mill-79002180/"}