{"nrhp_refnum":"88000837","name":"County Bridge No. 54","other_names":[],"category":"structure","location":{"address":"Morris Rd. over branch of Wissahickon Creek","address_restricted":false,"city":"Prospectville","county":"Montgomery County","state":"PA","lat":40.13967450400003,"lon":-75.21655300399993,"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":"County Bridge No. 54 is a three-arch stone highway bridge carrying Morris Road over Wissahickon Creek in Whitemarsh Township, Montgomery County, Pennsylvania. Two stone plaques date its construction to 1841 and a rebuilding to 1916.","why_significant":"The nomination argues the bridge is a typical nineteenth-century stone highway bridge, partly rebuilt in the twentieth century. Its arch spans are set off from the bridge body by a built-in recession, a feature the nomination says appears peculiar to Montgomery County, where five stone arch bridges share it. Grouped with the other stone bridges in the nomination, it illustrates the continuing tradition of stone masonry construction in Pennsylvania. The area of significance is engineering.","narrative":"Three stone arches span Wissahickon Creek on Morris Road in Whitemarsh Township, Montgomery County, Pennsylvania. Two stone plaques on the parapets record construction in 1841 and rebuilding in 1916. Each arch spans about twenty-eight and a half feet, and the arch sections are set apart from the rest of the bridge body by a small recessed band that runs across both arch crowns. The bridge is regarded as a typical nineteenth-century stone highway bridge that was partly rebuilt in the twentieth century. Its recessed arch treatment is considered distinctive to Montgomery County, where five stone arch bridges are built in the same way. The bridge is significant for its engineering and for its place in a group of ten Montgomery County stone bridges, built between 1789 and 1910, that illustrate the continuing tradition of stone masonry construction in Pennsylvania. The nominated area is a rectangle about 125 feet long and 25 feet wide, covering the superstructure and substructure.","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 17:11:35.885407-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/88000837.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/88000837/50a838d208-800.webp","url_1600":"https://nationalhistoricalregister.com/media/88000837/50a838d208-1600.webp","licence":"Public domain","author":"PennDOT","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:County_Bridge_No._54.jpg\" rel=\"noopener\">PennDOT</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:County_Bridge_No._54.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71993386","wikipedia":"https://en.wikipedia.org/wiki/County_Bridge_No._54","wikidata":"https://www.wikidata.org/wiki/Q5177633"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/montgomery-county/county-bridge-no-54-88000837/"}