{"nrhp_refnum":"88000789","name":"Ironstone Bridge","other_names":[],"category":"structure","location":{"address":"Farmington Ave. over Ironstone Creek","address_restricted":false,"city":"Morysville","county":"Berks County","state":"PA","lat":40.32001900700004,"lon":-75.65191829199995,"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 concrete solid barrel arch highway bridge carrying a road over Ironstone Creek in Douglass Township, Berks County, Pennsylvania, near Farmington Avenue. It was built in 1907.","why_significant":"The nomination presents the bridge as a representative example of an early twentieth century concrete arch bridge. It is one of fifteen concrete solid barrel arches in the group nomination, and it is described as unaltered and exceptionally well preserved for its type. Its simple incised parapet is typical of early concrete highway bridges. The area of significance is engineering.","narrative":"Ironstone Bridge is a single-span concrete solid barrel arch highway bridge in Douglass Township, Berks County, Pennsylvania, carrying a road over Ironstone Creek near Farmington Avenue. Built in 1907, the bridge has a 50-foot main span and an overall length of 104 feet, with a width of 25 feet. Its continuous concrete parapet is simply ornamented with incised lines, and its keyed parapet sections are interlocked. The engineering was designed by N. M. Davis, and Willauer and Company served as contractor. The bridge is one of fifteen concrete solid barrel arches included in a group of Commonwealth highway bridges. It is regarded as a representative example of early twentieth century concrete arch construction, with construction dates for this general type ranging from 1895 to 1930. It is valued for its engineering and for remaining unaltered, which makes it an exceptionally well preserved example of its type. Vehicular traffic still uses the crossing.","period_of_significance":"1907","architect_builder":"N. M. Davis (designer/engineer); Willauer & Co. (builder/contractor)","architectural_style":null,"criteria":[],"status_note":"Unaltered; the form notes vehicular use and that it is unaltered.","vacant_flag":false,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:37.691716-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/88000789.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/88000789/9ed678187b-800.webp","url_1600":"https://nationalhistoricalregister.com/media/88000789/9ed678187b-1600.webp","licence":"CC BY-SA 3.0","author":"Hshuvaeva","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Ironstone_Bridge_01.JPG\" rel=\"noopener\">Hshuvaeva</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\" rel=\"license noopener\">CC BY-SA 3.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Ironstone_Bridge_01.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71992354","wikipedia":"https://en.wikipedia.org/wiki/Ironstone_Bridge","wikidata":"https://www.wikidata.org/wiki/Q15228813"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/berks-county/ironstone-bridge-88000789/"}