{"nrhp_refnum":"79003193","name":"Patterson Covered Bridge No. 112","other_names":[],"category":"structure","location":{"address":"SR 575","address_restricted":false,"city":"Orangeville","county":"Columbia County","state":"PA","lat":41.10950633700003,"lon":-76.41714883499998,"geom_source":"nps_gis"},"listed_date":"1979-11-29","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Transportation"],"significance_levels":["local"],"summary":{"what_it_is":"A covered bridge in Orangeville, Columbia County, Pennsylvania, 81.66 feet long with a roadway width of 14.6 feet and a clearance of 11 feet. It is a Burr Truss Arch bridge.","why_significant":"The bridge is significant in engineering and transportation. The document places it within the county's covered bridges, which it says were built with varied truss designs suited to span length and are unique because none has been built in the county for half a century. Bridges of this kind served the growth of towns and the farm, saw mill and grist mill businesses that depended on travel between them.","narrative":"Orangeville's Patterson Covered Bridge is a Burr Truss Arch structure measuring 81.66 feet long, with a roadway 14.6 feet wide and 11 feet of clearance. It has four diagonal braces on either side of a central king post. The roof is covered in tarred metal panels laid over wooden ribs and rafters, and the portals and side walls are finished in board and batten. Three side windows carry moveable board and batten awnings. The roadway is horizontal boards with a single wide runway laid over them, and many of the undergirding braces are new wood, with several beams treated with creosote. The abutments were largely rebuilt in reinforced concrete, though much of the original stone and mortar approach walls remain. Frank Derr is named as builder. The bridge is important to Columbia County's transportation history, when travel between farms, saw mills and grist mills drove the need for crossings. Its truss design also reflects the engineering choices the county used for covered bridges, and no comparable bridge has been built there in fifty years.","period_of_significance":null,"architect_builder":"Frank Derr (builder)","architectural_style":"Burr Truss Arch","criteria":["A"],"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 17:11:33.687552-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/79003193.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/79003193/76ec46a9cd-800.webp","url_1600":"https://nationalhistoricalregister.com/media/79003193/76ec46a9cd-1600.webp","licence":"CC0","author":"Smallbones","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Patterson_CB_112_PA.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:Patterson_CB_112_PA.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71992820","wikipedia":"https://en.wikipedia.org/wiki/Patterson_Covered_Bridge_No._112","wikidata":"https://www.wikidata.org/wiki/Q7148433"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/columbia-county/patterson-covered-bridge-no-112-79003193/"}