{"nrhp_refnum":"11000250","name":"Heyworth-Mason Industrial Building","other_names":[],"category":"building","location":{"address":"Mason Hill Rd.","address_restricted":false,"city":"Peru","county":"Clinton County","state":"NY","lat":44.58063125800004,"lon":-73.52444428499996,"geom_source":"nps_gis"},"listed_date":"2011-05-06","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A three-story stone industrial building on Mason Hill Road in the hamlet of Peru, Clinton County, New York, built in 1836 by Richard Heyworth on the banks of the Little Ausable River.","why_significant":"It is argued to be a mostly intact example of an early stone industrial building in northern New York, notable for its scale and fine masonry craftsmanship (Criterion C). It is also tied to A. Mason and Sons Lumber Company, a firm that operated for 90 years, was Peru's largest employer for most of its existence, and influenced the building industry across Clinton and Essex Counties and beyond (Criterion A).","narrative":"Built in 1836 by Richard Heyworth beside the Little Ausable River in Peru, New York, this three-story, seven-bay building is made of rough-cut Potsdam sandstone laid in roughly horizontal courses. It has a standing seam metal gable roof, paired front doors, interior gable-end chimneys and splayed stone lintels. A date stone over the entrance records its construction. Local history says it began as a starch factory. In 1883 the Mason family rented it, and in 1903 they bought it. A. Mason and Sons Lumber Company used it as the center of a custom millwork business, with a sales room, offices and storage for specialty stock. The firm supplied lumber and millwork across the region, including for wartime military housing, and employed up to 200 people in winter. After the company closed in 1972, the building was converted to apartments. A severe flood in 1998-99 damaged the interior, but the walls, foundation and window pattern remain largely intact. It is the last surviving industrial building in its immediate area.","period_of_significance":"1836 - 1972","architect_builder":"unknown","architectural_style":"No Style","criteria":["A","C"],"status_note":"Listed as vacant/not in use; the interior was flood-damaged in 1998-99, though the building is described as structurally sound.","vacant_flag":true,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:50:48.714662-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/11000250.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/11000250/901bf36065-800.webp","url_1600":"https://nationalhistoricalregister.com/media/11000250/901bf36065-1600.webp","licence":"CC BY-SA 4.0","author":"45PenPhoto","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Heyworth-Mason_Industrial_Building_01.jpg\" rel=\"noopener\">45PenPhoto</a>, <a href=\"https://creativecommons.org/licenses/by-sa/4.0\" rel=\"license noopener\">CC BY-SA 4.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Heyworth-Mason_Industrial_Building_01.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75316929","wikipedia":"https://en.wikipedia.org/wiki/Heyworth%E2%80%93Mason_Industrial_Building","wikidata":"https://www.wikidata.org/wiki/Q23091781"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/clinton-county/heyworth-mason-industrial-building-11000250/"}