{"nrhp_refnum":"88000790","name":"Barto Bridge","other_names":[],"category":"structure","location":{"address":"LR 284 over trib. to Perkiomen Creek","address_restricted":false,"city":"Barto","county":"Berks County","state":"PA","lat":40.396296015000075,"lon":-75.60834866199997,"geom_source":"nps_gis"},"listed_date":"1988-06-22","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering"],"significance_levels":["state"],"summary":{"what_it_is":"A single-span concrete arch highway bridge carrying Route 284 (Old 100) over Trib. to Perkiomen Creek in Washington Township, Berks County, Pennsylvania. It has an 82-foot main span and a 146-foot overall length.","why_significant":"The nomination describes the bridge as a representative and well-preserved example of an early twentieth-century solid, barrel concrete arch bridge. Its parapet is embellished with simple incised lines, a feature the nomination describes as typical of early concrete highway bridges. The nomination treats it as one of fifteen similar concrete arches built between 1895 and 1930.","narrative":"Built in 1908 over a tributary of Perkiomen Creek in Washington Township, Berks County, the Barto Bridge is a single-span solid barrel concrete arch carrying a rural road, Route 284, formerly Old Route 100. The main span measures 82 feet and the overall length is 146 feet. The arch is capped by a continuous parapet wall embellished with incised lines, a decorative treatment the nomination describes as typical of early twentieth-century concrete highway bridges. Its designer was N. M. Davis and its contractor was Willauer & Co., according to PennDOT records and a plaque on the bridge. The bridge is one of fifteen concrete solid barrel arches documented in a multiple-resource group of Pennsylvania state highway bridges, built between 1895 and 1930. The nomination regards its well-preserved condition as the reason it merits inclusion, as an example of this bridge type from the period. Its parapets have been replaced in later work, and it is recorded as altered in that respect.","period_of_significance":null,"architect_builder":"N. M. Davis (designer/engineer); Willauer & Co. (builder/contractor)","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 17:11:38.152893-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/88000790.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/88000790/b64a4f0a17-800.webp","url_1600":"https://nationalhistoricalregister.com/media/88000790/b64a4f0a17-1600.webp","licence":"CC BY-SA 3.0","author":"Hshuvaeva","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Barto_Bridge_02.JPG\" rel=\"noopener\">Hshuvaeva</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:Barto_Bridge_02.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71992356","wikipedia":"https://en.wikipedia.org/wiki/Barto_Bridge","wikidata":"https://www.wikidata.org/wiki/Q4865468"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/berks-county/barto-bridge-88000790/"}