{"nrhp_refnum":"88000864","name":"Fagleysville Road Bridge Crossing Swamp Creek","other_names":[],"category":"structure","location":{"address":"Fagleysville Rd. over Swamp Creek","address_restricted":false,"city":"Fagleysville","county":"Montgomery County","state":"PA","lat":40.27453673800005,"lon":-75.48492253899997,"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 Pratt through truss highway bridge carrying Fagleysville Road over Swamp Creek in Upper Frederick Township, Montgomery County, Pennsylvania. The form gives a 135-foot main span and a built date of 1888.","why_significant":"The nomination argues the bridge is significant for engineering. Its compression members are Phoenix columns, a patented wrought iron column made by the Phoenix Bridge Company, and the form states it is the only one of fourteen Pratt through trusses in the group built with this member type. It is also one of only four trusses in the group located in southeastern Pennsylvania.","narrative":"A 135-foot Pratt through truss bridge crosses Swamp Creek on Fagleysville Road in Upper Frederick Township, Montgomery County, Pennsylvania. It was built in 1888 and carries vehicular traffic across a rural woodland and farmland setting. Its compression members are Phoenix columns, a patented design of wrought iron built from flanged, segmental sections riveted together to form a tube. The Phoenix Bridge Company was a nationally prominent builder, and this column type was a trademark of its work. Of the fourteen Pratt through trusses included in the group of bridges nominated with this one, this is the only example fabricated with Phoenix columns. It is also one of only four trusses in that group located in southeastern Pennsylvania. The nominated area is a rectangle about 135 by 25 feet, covering only the superstructure, substructure and wing walls. The bridge was listed for its engineering significance. The form records it as closed to traffic.","period_of_significance":"1888","architect_builder":null,"architectural_style":null,"criteria":[],"status_note":"Structure closed to traffic","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:37.221014-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/88000864.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/88000864/06013502e3-800.webp","url_1600":"https://nationalhistoricalregister.com/media/88000864/06013502e3-1600.webp","licence":"Public domain","author":"PennDOT","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Bridge_in_Upper_Frederick_Township,_Fagleysville_Road.jpg\" rel=\"noopener\">PennDOT</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Bridge_in_Upper_Frederick_Township,_Fagleysville_Road.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71993398","wikipedia":"https://en.wikipedia.org/wiki/Fagleysville_Road_Bridge_Crossing_Swamp_Creek","wikidata":"https://www.wikidata.org/wiki/Q4966380"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/montgomery-county/fagleysville-road-bridge-crossing-swamp-creek-88000864/"}