{"nrhp_refnum":"73001666","name":"Hillsgrove Covered Bridge","other_names":[],"category":"structure","location":{"address":"3 mi. E of Hillsgrove off PA 87 over Loyalsock Creek","address_restricted":false,"city":"Hillsgrove","county":"Sullivan County","state":"PA","lat":41.46090493600008,"lon":-76.67107540799998,"geom_source":"nps_gis"},"listed_date":"1973-07-02","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Transportation"],"significance_levels":["state"],"summary":{"what_it_is":"A single-span wooden covered bridge crossing Loyalsock Creek about three miles east of Hillsgrove in Sullivan County, Pennsylvania. The document dates it to circa 1850.","why_significant":"The bridge is built in the arch truss manner associated with Theodore Burr, whose design is described as a curved arch anchored to the piers with chords and king posts. The nomination states that it is wider and longer than any other single-span covered bridge in Pennsylvania and that it is one of the few wooden covered bridges in the state that have survived neglect and arson.","narrative":"Built circa 1850, the Hillsgrove Covered Bridge spans Loyalsock Creek about three miles east of Hillsgrove in Sullivan County, Pennsylvania. It is a single-span wooden structure 171 feet long and about 17.9 feet wide, built in the arch truss manner associated with Theodore Burr. A curved arch is anchored into the adjoining stone piers and supports upper and lower horizontal chords that carry the floor and roof, with multiple king posts between them. The sides are covered with rough-hewn siding. Its builders' design is the basis of its importance. The roadway is reported to be wider and longer than any other single-span covered bridge in Pennsylvania. It is also one of the few wooden covered bridges in the state that survived long use, neglect and arson. Later alterations include steel supports added to correct sagging, repointed abutments, and replacement siding and roofing.","period_of_significance":"circa 1850","architect_builder":null,"architectural_style":null,"criteria":[],"status_note":"Structurally altered with steel supports added to correct sagging, repointed stone abutments, and new siding and roofing replacing deteriorated originals; condition rated fair.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:29.461357-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/73001666.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/73001666/2c4e822263-800.webp","url_1600":"https://nationalhistoricalregister.com/media/73001666/2c4e822263-1600.webp","licence":"CC BY-SA 3.0","author":"Ruhrfisch","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Hillsgrove_Covered_Bridge.jpg\" rel=\"noopener\">Ruhrfisch</a>, <a href=\"http://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:Hillsgrove_Covered_Bridge.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71993883","wikipedia":"https://en.wikipedia.org/wiki/Hillsgrove_Covered_Bridge","wikidata":"https://www.wikidata.org/wiki/Q11330322"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/sullivan-county/hillsgrove-covered-bridge-73001666/"}