{"nrhp_refnum":"91002011","name":"Kenderdine Mill Complex","other_names":[],"category":"building","location":{"address":"Jct. of Keith Valley and Davis Grove Rds.","address_restricted":false,"city":"Horsham","county":"Montgomery County","state":"PA","lat":40.20885452550007,"lon":-75.17037213413161,"geom_source":"nps_gis"},"listed_date":"1992-01-22","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"Fieldstone mill complex at the intersection of Keith Valley and Davis Grove Roads in northwest Horsham Township, Montgomery County, Pennsylvania, with its mill building dating from 1734-1735, a mill owner's house, a Kenderdine family house and an 1858 stable and carriage house.","why_significant":"The nomination argues the complex is a remarkably well preserved early industrial site on its original location, with original wooden machinery and a bolting machine dated to the 1840s. It is described as the last surviving mill of its kind in the township and as a reflection of the evolving fieldstone architecture of the region. It also helped prompt the opening of several local roads.","narrative":"Fieldstone mill at the junction of Keith Valley and Davis Grove Roads in northwest Horsham Township, Montgomery County, built in 1734 and 1735 by Joseph Kenderdine, a millwright of the Richard Kenderdine family. The gable-roofed rubble stone mill was enlarged by a third story in the nineteenth century, when its roof pitch was also altered. Its interior retains massive hand-hewn oak framing, wooden cranes, a wooden sack and cask hoist, and a bolting machine dated to the 1840s. The complex includes a mill owner's house, a Kenderdine family house with early eighteenth-century sections, and an 1858 stone stable and carriage house. Once powered by a breast-shot water wheel, the mill operated until the early twentieth century and now lacks its wheel and belts. It is regarded as one of the last surviving mills of its kind in its township, valued for its early date, integrity and the roads that were opened to reach it.","period_of_significance":"1735-c.1900","architect_builder":"Joseph Kenderdine (builder)","architectural_style":"Postmedieval English Colonial; Federal","criteria":[],"status_note":"Operated by water power until the early twentieth century; lacks its water wheel and belts and is not currently operational.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:37.722223-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/91002011.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/91002011/a22cf2cb66-800.webp","url_1600":"https://nationalhistoricalregister.com/media/91002011/a22cf2cb66-1600.webp","licence":"CC BY-SA 3.0","author":"Carla Loughlin","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:The_Mill_at_the_Kenderdine_Mill_Complex.JPG\" rel=\"noopener\">Carla Loughlin</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:The_Mill_at_the_Kenderdine_Mill_Complex.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71995898","wikipedia":"https://en.wikipedia.org/wiki/Kenderdine_Mill_Complex","wikidata":"https://www.wikidata.org/wiki/Q6388974"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/montgomery-county/kenderdine-mill-complex-91002011/"}