{"nrhp_refnum":"88000797","name":"Bridge in Shaler Township","other_names":[],"category":"structure","location":{"address":"Birchfield Rd. over Pine Creek","address_restricted":false,"city":"Glenshaw","county":"Allegheny County","state":"PA","lat":40.545365926000045,"lon":-79.95111980199994,"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 stone arch highway bridge carrying Birchfield Road over Pine Creek in Shaler Township, near Glenshaw, Allegheny County, Pennsylvania. It was built in 1915.","why_significant":"The nomination describes the bridge as a fine example of an early twentieth century stone arch bridge, built of high quality ashlar construction with a single arch spanning sixty-three feet. It is one of two nominated stone arch bridges in Allegheny County, which are similar in materials and detail. The bridge is said to illustrate the continuity of stone arch bridge building in Pennsylvania and to retain excellent integrity.","narrative":"Built in 1915, this single-span stone arch bridge carries Birchfield Road over Pine Creek in Shaler Township, near Glenshaw in Allegheny County. Its arch spans sixty-three feet and is constructed of high quality ashlar masonry, with a voussoir ring of smooth-faced stone and an intrados of concrete with broken face edges. The structure measures 116 feet overall and sits in a rural setting. It is one of two stone arch bridges in Allegheny County nominated for listing, and the two are similar in materials and detail. The bridge is valued as an example of early twentieth century stone arch construction in western Pennsylvania, where few such bridges were located. It is regarded as illustrating the continuity of stone arch bridge building across Pennsylvania, and it retains its original form with no recorded alterations. The bridge is part of a group of Commonwealth-owned highway bridges nominated together.","period_of_significance":"1915","architect_builder":null,"architectural_style":null,"criteria":["C"],"status_note":"Unaltered according to the integrity section of the form.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:35.640109-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/88000797.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/88000797/66e5fae198-800.webp","url_1600":"https://nationalhistoricalregister.com/media/88000797/66e5fae198-1600.webp","licence":"CC BY-SA 4.0","author":"Lee Paxton","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:BridgeinShalerTownship.jpg\" rel=\"noopener\">Lee Paxton</a>, <a href=\"https://creativecommons.org/licenses/by-sa/4.0\" rel=\"license noopener\">CC BY-SA 4.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:BridgeinShalerTownship.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71992214","wikipedia":"https://en.wikipedia.org/wiki/Bridge_in_Shaler_Township","wikidata":"https://www.wikidata.org/wiki/Q4966377"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/allegheny-county/bridge-in-shaler-township-88000797/"}