{"nrhp_refnum":"79003190","name":"Furnace Covered Bridge No. 11","other_names":[],"category":"structure","location":{"address":"SR 373","address_restricted":false,"city":"Esther","county":"Columbia County","state":"PA","lat":40.906656170000076,"lon":-76.45982988399999,"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 spanning a stream near Esther in Columbia County, Pennsylvania, about 100.8 feet long with a 13.33-foot roadway and two queen post trusses supported by a mid-stream pier. The builder is listed as C. W. Eves.","why_significant":"The nomination argues the bridge is significant under engineering and transportation. It notes that covered bridges were adopted over open wooden spans because of their longer life, and that Columbia County bridges use a range of truss designs, including queen post trusses for longer spans. It also links the bridge to rapid town growth and to the need to move goods between farms, saw mills and grist mills.","narrative":"Furnace Covered Bridge is a wooden covered bridge near Esther in Columbia County, Pennsylvania. It measures 100.8 feet long with a roadway 13.33 feet wide and 11 feet of clearance. Two queen post trusses carry the span, which rests on a mid-stream pier and concrete abutments. The roof is tarred metal panel laid over wooden ribs, and the portals and walls are covered in vertical and board-and-batten boarding. Each side wall has one window placed to improve sightlines for approaching drivers. The bridge was built by C. W. Eves. It is significant for its engineering and for its role in transportation. Covered bridges replaced open wooden spans because they lasted longer, and the county used several truss types, with queen posts favored for longer crossings. The bridge served farms, saw mills and grist mills during a period of rapid town growth.","period_of_significance":"1800-1899","architect_builder":"C. W. Eves (builder)","architectural_style":null,"criteria":["C"],"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 17:11:33.3387-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/79003190.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/79003190/0e46847b24-800.webp","url_1600":"https://nationalhistoricalregister.com/media/79003190/0e46847b24-1600.webp","licence":"CC BY-SA 3.0","author":"Ruhrfisch","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Furnace_Covered_Bridge_3.JPG\" rel=\"noopener\">Ruhrfisch</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:Furnace_Covered_Bridge_3.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71992842","wikipedia":"https://en.wikipedia.org/wiki/Furnace_Covered_Bridge_No._11","wikidata":"https://www.wikidata.org/wiki/Q5509609"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/columbia-county/furnace-covered-bridge-no-11-79003190/"}