{"nrhp_refnum":"79002243","name":"Trusal Covered Bridge","other_names":[],"category":"structure","location":{"address":"W of Willet","address_restricted":false,"city":"Willet","county":"Indiana County","state":"PA","lat":40.730436764000046,"lon":-79.18443439999999,"geom_source":"nps_gis"},"listed_date":"1979-08-03","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Transportation"],"significance_levels":["local"],"summary":{"what_it_is":"A 35-foot Town lattice truss covered bridge over Plum Creek in Washington Township, Indiana County, Pennsylvania, dated 1870 in the inventory. It is one of four surviving covered bridges in the county, which are owned by the county.","why_significant":"The nomination argues the bridge is an intact and important example of 19th-century wood truss technology and of covered bridge construction in Indiana County. It is one of only four extant covered bridges in the county, so it is presented as part of a thematic group of surviving county bridges.","narrative":"Along Plum Creek in Washington Township, Indiana County, Pennsylvania, stands a covered bridge with a 35-foot span, dated to 1870 in the county inventory. It is built with a Town truss, a lattice system of crossed wooden members named for its designer Ithiel Town, and it has vertical siding, a gable roof, and an open band of window area beneath the roofline. Its floor is laid with boards running across the span. Of the six covered bridges the county once had, four remain, and this is one of them. The county owns and maintains the four surviving bridges, which are regarded as the only examples of their type left in the county. The bridge is valued as an intact example of nineteenth-century wood truss technology and as a visible record of the county's covered bridge building. Its survival in good condition is the main basis for its importance.","period_of_significance":null,"architect_builder":null,"architectural_style":null,"criteria":[],"status_note":"Good condition","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:31.091778-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/79002243.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/79002243/4013e74b44-800.webp","url_1600":"https://nationalhistoricalregister.com/media/79002243/4013e74b44-1600.webp","licence":"CC BY-SA 3.0","author":"JERRYE &amp; ROY KLOTZ MD","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:TRUSAL_COVERED_BRIDGE.jpg\" rel=\"noopener\">JERRYE &amp;amp; ROY KLOTZ MD</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:TRUSAL_COVERED_BRIDGE.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71993089","wikipedia":"https://en.wikipedia.org/wiki/Trusal_Covered_Bridge","wikidata":"https://www.wikidata.org/wiki/Q7848051"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/indiana-county/trusal-covered-bridge-79002243/"}