{"nrhp_refnum":"79003185","name":"Johnson Covered Bridge No. 28","other_names":[],"category":"structure","location":{"address":"SR 320","address_restricted":false,"city":"Catawissa","county":"Columbia County","state":"PA","lat":40.87797791100007,"lon":-76.48353034599995,"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 Columbia County, Pennsylvania, near Catawissa, of the Warren Truss design with a queen post feature. It measures 60.25 feet long with a 13.5-foot roadway and 12-foot clearance.","why_significant":"The nomination argues the bridge is significant under engineering and transportation. Its Warren Truss construction with queen post elements reflects the county's covered bridge engineering, and it served the transportation needs of growing towns and farming, saw and grist mill activity. The document notes that covered bridges have not been built in Columbia County in the last half century, which it presents as making the county's bridge design and engineering unique.","narrative":"Covered bridge near Catawissa in Columbia County, Pennsylvania, built with a Warren Truss design and iron tension rods running parallel to a queen post. The span is 60.25 feet long, with a roadway 13.5 feet wide and 12 feet of clearance. Its metal roof panels sit over wooden ribs and rafters, and its portals tilt slightly inward from roof to deck in board and batten style. The floor is laid in horizontal boards with two runways, and the undergirding uses six boards pinned together where the main structural brace meets the abutments. Builder Daniel Stine is named in the nomination. Covered bridges like this one were built to carry traffic between growing towns and the farms, saw mills and grist mills that depended on them. The structure is regarded as an example of regional bridge engineering, and the document notes that no covered bridges have been built in the county for nearly fifty years.","period_of_significance":null,"architect_builder":"Daniel Stine (builder)","architectural_style":"Warren Truss","criteria":["A","C"],"status_note":"Wall coverings are sagging and in need of repairs; abutments have been extensively patched with concrete.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:34.000909-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/79003185.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/79003185/ebff3d50a2-800.webp","url_1600":"https://nationalhistoricalregister.com/media/79003185/ebff3d50a2-1600.webp","licence":"CC BY-SA 4.0","author":"Ruhrfisch (talk)","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Johnson_Covered_Bridge_1.JPG\" rel=\"noopener\">Ruhrfisch (talk)</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:Johnson_Covered_Bridge_1.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71992846","wikipedia":"https://en.wikipedia.org/wiki/Johnson_Covered_Bridge_No._28","wikidata":"https://www.wikidata.org/wiki/Q6268273"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/columbia-county/johnson-covered-bridge-no-28-79003185/"}