{"nrhp_refnum":"80003409","name":"Dunlap, William B., Mansion","other_names":[],"category":"building","location":{"address":"1298 Market St.","address_restricted":false,"city":"Bridgewater","county":"Beaver County","state":"PA","lat":40.70771754100008,"lon":-80.29779841899995,"geom_source":"nps_gis"},"listed_date":"1980-08-29","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Politics/Government","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A brick mansion on a bluff overlooking the Beaver River in Bridgewater, Beaver County, Pennsylvania, built circa 1840 and owned by James Arbuckle of the Arbuckle Coffee Company before 1865.","why_significant":"The nomination argues the house is a well-preserved early mansion in a local interpretation of the Greek Revival style and the finest example of that style surviving in Bridgewater. It also links the house to William B. Dunlap, who used it as a base for river transportation interests and later served in the Pennsylvania Senate, and to the Beaver River's early role in westward travel.","narrative":"Built around 1840 on a bluff above the Beaver River in Bridgewater, this brick mansion rises three stories on an elevated main floor reached by high steps and porticoed porches. Four massive columns, each about thirteen feet tall, frame the entrances, and the main floor's large hall opens to rooms divided by huge sliding doors suited to both large and small formal events. Original hand-blown window glass with a greenish-blue tint survives, along with tongue-and-groove cedar floors on the upper levels. James Arbuckle, of the Arbuckle Coffee Company, owned the house before 1865. William B. Dunlap lived there for decades, using it as a base for Ohio River freight operations and later serving in the Pennsylvania Senate. The property is valued for its well-preserved interior and exterior and for its links to regional river commerce and politics.","period_of_significance":"c. 1840","architect_builder":null,"architectural_style":"Greek Revival (local interpretation)","criteria":[],"status_note":"Altered by use as a Veterans Social Club; original woodwork is being restored and the garden is buried under sod.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:33.541504-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/80003409.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/80003409/1ee107e3eb-800.webp","url_1600":"https://nationalhistoricalregister.com/media/80003409/1ee107e3eb-1600.webp","licence":"Public domain","author":"User:Nyttend","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:William_B._Dunlap_Mansion.jpg\" rel=\"noopener\">User:Nyttend</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:William_B._Dunlap_Mansion.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71994753","wikipedia":"https://en.wikipedia.org/wiki/William_B._Dunlap_Mansion","wikidata":"https://www.wikidata.org/wiki/Q8004785"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/beaver-county/dunlap-william-b-mansion-80003409/"}