{"nrhp_refnum":"96000965","name":"Mill Creek Historic District (Boundary Increase)","other_names":[],"category":"district","location":{"address":"Roughly bounded by the Schuylkill River, Mill Cr., Righter's Mill, Rose Glen, and Monk's Rds., Lower Merion Township","address_restricted":false,"city":"Gladwyne","county":"Montgomery County","state":"PA","lat":40.031355139000055,"lon":-75.27489209853326,"geom_source":"nps_gis"},"listed_date":"1996-08-30","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Historic - Non-Aboriginal","Industry","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A wooded valley district with eighteenth and nineteenth century water-powered mill complexes, mill workers' housing, mill ruins and early twentieth century estate and suburban houses along Mill Creek in Lower Merion Township, Montgomery County, Pennsylvania, near the village of Gladwyne. It is a boundary increase to the existing Mill Creek Historic District.","why_significant":"The document argues the district is important for its role in the milling industry, which produced paper, guns and textiles and helped make the Philadelphia region a center of industry, and for its archaeological sites. It is also significant architecturally for its mill complexes, large turn-of-the-century estate houses and 1920s to 1940s residences by architect Walter K. Durham.","narrative":"Along Mill Creek in Lower Merion Township, a wooded ravine about ten miles from central Philadelphia holds a cluster of water-powered mills, mill workers' houses and mill ruins dating from the eighteenth and nineteenth centuries. The creek's fall of roughly 250 feet made it a valuable source of power, and the earliest recorded mill was built by John Roberts. Christopher Robins constructed a mill here in 1758, and the Walover/Jones Mill complex, possibly dating to the same year, is the most intact of the mill communities. Paper was the main product in the eighteenth century, and later mills turned to gunpowder, lamp wicks, textiles and gun parts. Nippes began making long guns here in 1814. The district is also significant for its large estate houses and twentieth century residences, and for archaeological sites that may show how mill workers and owners lived.","period_of_significance":"C. 1758-1946","architect_builder":"Price and McLanahan; Walter K. Durham (architect)","architectural_style":"Colonial; Federal; Tudor Revival; Vernacular Mill Buildings","criteria":["A","C","D"],"status_note":null,"vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:37.295763-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/96000965.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/96000965/4a9365f42a-800.webp","url_1600":"https://nationalhistoricalregister.com/media/96000965/4a9365f42a-1600.webp","licence":"CC BY-SA 3.0","author":"Smallbones","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:750_Mill_Creek_Rd_MontCo_PA.JPG\" rel=\"noopener\">Smallbones</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:750_Mill_Creek_Rd_MontCo_PA.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71995665","wikipedia":"https://en.wikipedia.org/wiki/Mill_Creek_Historic_District_(Bryn_Mawr_and_Gladwyne,_Pennsylvania)","wikidata":"https://www.wikidata.org/wiki/Q6858282"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/montgomery-county/mill-creek-historic-district-boundary-increase-96000965/"}