{"nrhp_refnum":"74001797","name":"Pottstown Roller Mill","other_names":[],"category":"building","location":{"address":"South and Hanover Sts.","address_restricted":false,"city":"Pottstown","county":"Montgomery County","state":"PA","lat":40.24344011800008,"lon":-75.65177011599997,"geom_source":"nps_gis"},"listed_date":"1974-10-10","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry","Engineering","Architecture","Agriculture"],"significance_levels":["local"],"summary":{"what_it_is":"A grist and feed mill on South and Hanover Streets in Pottstown, Montgomery County, Pennsylvania, on the Schuylkill River at the mouth of the Manatawny. The original fieldstone section dates from 1725, and the complex was enlarged in 1856 and later.","why_significant":"The nomination argues the mill is the oldest continuing manufacturing company in Pottstown and is believed to be among the earliest grist mills in Pennsylvania. It also cites its role supplying grain and flour to the Continental Army and its water-powered machinery, including elevators still run by water power.","narrative":"Beside the Manatawny where it meets the Schuylkill River in Pottstown, the mill began in 1725 as a two-story fieldstone building. Owners stuccoed and enlarged it repeatedly. In 1856 Henry and Jacob H. Gabel added two brick stories and rebuilt it as a 45 by 50 foot mill, and a later five-bay brick addition was joined under a crossing gable roof. Its mill race and dam, with water rights granted in the will of John Potts, still supply the water power that drives the machinery. The nomination treats the mill as the oldest continuing manufacturing business in Pottstown and one of the earliest grain mills in Pennsylvania. It notes use of the mill as a gathering place during an 1729 Indian skirmish and its supply of grain and flour to the Continental Army. Its elevators, still water-powered, are cited as examples of early American industrial engineering.","period_of_significance":"1725-1856","architect_builder":null,"architectural_style":null,"criteria":[],"status_note":"Still operating; the mill no longer makes flour but continues to grind corn for feed.","vacant_flag":false,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:30.024436-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/74001797.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/74001797/b17929688a-800.webp","url_1600":"https://nationalhistoricalregister.com/media/74001797/b17929688a-1600.webp","licence":"CC0","author":"Smallbones","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Pottstown_Roller_Mill.JPG\" rel=\"noopener\">Smallbones</a>, <a href=\"http://creativecommons.org/publicdomain/zero/1.0/deed.en\" rel=\"license noopener\">CC0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Pottstown_Roller_Mill.JPG"},"district":{"nrhp_refnum":"85001955","name":"Old Pottstown Historic District (Additional Documentation)","url":"https://nationalhistoricalregister.com/districts/pennsylvania/old-pottstown-historic-district-additional-documentation-85001955/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71997854","wikipedia":"https://en.wikipedia.org/wiki/Pottstown_Roller_Mill","wikidata":"https://www.wikidata.org/wiki/Q7235400"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/montgomery-county/pottstown-roller-mill-74001797/"}