{"nrhp_refnum":"88000793","name":"Bridge in Snake Spring Township","other_names":[],"category":"structure","location":{"address":"TR 30 over Raystown branch of Juniata River","address_restricted":false,"city":"Bedford","county":"Bedford County","state":"PA","lat":40.01377820100004,"lon":-78.47131940299994,"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 five-span open-spandrel concrete arch bridge carrying Snake Spring Township traffic over the Raystown Branch of the Juniata River in Bedford County, Pennsylvania. It is one of fifteen open-spandrel concrete arch bridges in the nomination group.","why_significant":"The nomination argues the bridge is an unusual example of an open-spandrel concrete arch because it is built on a skew, with high skewed piers. It is one of only two nominated open-spandrel arches built on a skew, making it a rare representative of the added engineering needed for a skewed bridge. The area of significance given is engineering.","narrative":"A five-span open-spandrel concrete arch bridge crossing the Raystown Branch of the Juniata River in Snake Spring Township, Bedford County, Pennsylvania. Three main spans of 116 feet each are flanked by two approach spans of the same length, giving an overall length of 580 feet. The bridge was built in 1934, with construction credited to the Pittsburgh Construction Co. Its arches rest on high piers set at a skew to the crossing, which required additional engineering beyond that of a straight bridge. Of the fifteen open-spandrel concrete arch bridges in the group, only two are built on a skew, and this is one of them. Its significance lies chiefly in that engineering challenge, and it is regarded as a fairly rare example of how skewed bridges were designed. The bridge is recorded as unaltered and remains in vehicular use, carrying traffic on a road with a horizontal curve in a rural, rocky setting.","period_of_significance":"1934","architect_builder":"Pittsburgh Construction Co. (builder/contractor)","architectural_style":"Concrete Cone Arch","criteria":["C"],"status_note":"Unaltered; in use for vehicular traffic.","vacant_flag":false,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:37.930205-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/88000793.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/88000793/fcbe2798a8-800.webp","url_1600":"https://nationalhistoricalregister.com/media/88000793/fcbe2798a8-1600.webp","licence":"Public domain","author":"PennDOT","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Bridge_in_Snake_Spring_Township.jpg\" rel=\"noopener\">PennDOT</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Bridge_in_Snake_Spring_Township.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71992274","wikipedia":"https://en.wikipedia.org/wiki/Bridge_in_Snake_Spring_Township","wikidata":"https://www.wikidata.org/wiki/Q15204771"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/bedford-county/bridge-in-snake-spring-township-88000793/"}