{"nrhp_refnum":"88000825","name":"Bridge in East Fallowfield Township","other_names":[],"category":"structure","location":{"address":"LR 20012 over Unger Run","address_restricted":false,"city":"Atlantic","county":"Crawford County","state":"PA","lat":41.53515073500006,"lon":-80.33687863299997,"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 two-span bridge carrying vehicular traffic over Unger Run in East Fallowfield Township, Crawford County, Pennsylvania, near Atlantic. It combines a pin-connected Pratt through truss span with a pony truss span.","why_significant":"The nomination argues the bridge is a well preserved example of two types of Pratt truss bridges, through truss and pony truss, used frequently in the northwestern part of the state. It is described as one of the few nominated bridges in the commonwealth that illustrates both types. The area of significance is engineering.","narrative":"Over Unger Run in East Fallowfield Township, Crawford County, a two-span vehicular bridge of pin-connected steel construction carries traffic across the creek. One span is a through truss and the other a pony truss, both of the Pratt type. The bridge is dated 1894 on the basis of a plaque, and it has a total length of 282 feet and a roadway width of 25 feet. The superstructure rests on steel caissons filled with concrete. The bridge was made by the Wrought Iron Bridge Company, though the designer and builder are unknown. Its flooring was renewed in 1939, its deck in 1975, and a new steel deck was installed in 1982. The nomination regards it as an engineering resource of note because it is a well preserved example of both Pratt truss forms, common in northwestern Pennsylvania, and few bridges in the state show both types.","period_of_significance":null,"architect_builder":null,"architectural_style":null,"criteria":[],"status_note":"Altered: new flooring in 1939, new deck in 1975, and new steel deck in 1982; some minor plate weld repairs.","vacant_flag":false,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:37.989457-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/88000825.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/88000825/542d1947e6-800.webp","url_1600":"https://nationalhistoricalregister.com/media/88000825/542d1947e6-1600.webp","licence":"Public domain","author":"Nyttend","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Bridge_in_East_Fallowfield_Township_site.jpg\" rel=\"noopener\">Nyttend</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Bridge_in_East_Fallowfield_Township_site.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71992852","wikipedia":"https://en.wikipedia.org/wiki/Bridge_in_East_Fallowfield_Township_(Atlantic,_Pennsylvania)","wikidata":"https://www.wikidata.org/wiki/Q4966350"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/crawford-county/bridge-in-east-fallowfield-township-88000825/"}