{"nrhp_refnum":"79003826","name":"Wilson's Mill Covered Bridge","other_names":[],"category":"structure","location":{"address":"SE of Avella crossing Cross Creek, Cross Creek Township","address_restricted":false,"city":"Avella","county":"Washington County","state":"PA","lat":40.254320809000035,"lon":-80.39845679699994,"geom_source":"nps_gis"},"listed_date":"1979-06-22","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Transportation"],"significance_levels":["state"],"summary":{"what_it_is":"A covered bridge over Cross Creek in Hopewell Township, Washington County, Pennsylvania, near Avella, listed as part of the Covered Bridges of Washington and Greene Counties thematic group. The bridge is recorded as built in 1889 with a kingpost truss.","why_significant":"The nomination presents the bridge as one of a group of surviving wood covered bridges in the two counties, which it describes as an important example of a once common bridge type in Pennsylvania. The document notes the comparatively high survival rate of these structures in the region. The bridge is one of the group that illustrates the bridge type in terms of simple truss design and local features.","narrative":"A wood covered bridge carrying a road across Cross Creek in Hopewell Township, Washington County, Pennsylvania, built in 1889. It has a kingpost truss, a tin-covered gable roof, vertical siding and one large window on each side wall. The bridge measures about 35 feet along its end posts and has a road surface 13 feet wide. It is one of a group of covered bridges in Washington and Greene Counties recorded together under a single thematic listing. The bridges in the group are regarded as important examples of a once common bridge type in Pennsylvania, and the region keeps a comparatively high share of them. The group shows how this type of construction was adapted in rural counties, through simple truss designs and local design features. Listed in 1979 as part of that group, the Avella bridge is a surviving example of the regional tradition of timber covered bridges.","period_of_significance":null,"architect_builder":null,"architectural_style":null,"criteria":[],"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 17:11:30.654848-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/79003826.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/79003826/9db319de00-800.webp","url_1600":"https://nationalhistoricalregister.com/media/79003826/9db319de00-1600.webp","licence":"CC BY-SA 3.0","author":"JERRYE &amp; ROY KLOTZ MD","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:WILSON%27S_MILL_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:WILSON%27S_MILL_COVERED_BRIDGE.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71994007","wikipedia":"https://en.wikipedia.org/wiki/Wilson%27s_Mill_Covered_Bridge","wikidata":"https://www.wikidata.org/wiki/Q8022918"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/washington-county/wilsons-mill-covered-bridge-79003826/"}