{"nrhp_refnum":"77001194","name":"Gross Bridge","other_names":["Beaver Springs Covered Bridge"],"category":"structure","location":{"address":"3 mi. W of Beavertown on SR 574, Spring Township","address_restricted":false,"city":"Beavertown","county":"Snyder County","state":"PA","lat":40.751863892000074,"lon":-77.22307180399997,"geom_source":"nps_gis"},"listed_date":"1977-08-29","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Commerce","Engineering","Transportation"],"significance_levels":["local"],"summary":{"what_it_is":"A 100-foot single-span Burr arch covered timber highway bridge crossing Middle Creek near Beavertown in Snyder County, Pennsylvania, with timber abutments of masonry and a red painted wood-sided covering with shingle roof. It carries a gravel-surfaced light-duty road (TR-574) serving local farms.","why_significant":"The nomination presents the bridge as a typical example of the small timber bridges built across the county in the second half of the nineteenth century. It is one of only three covered timber bridges still actively maintained in Snyder County, and it has kept most of its original character in a rural area that has changed little.","narrative":"Spanning Middle Creek near Beavertown in Snyder County, this 100-foot single-span covered bridge is a Burr arch structure built of timber and resting on masonry abutments. Its red painted wood siding and shingle roof shelter a gravel and timber deck that carries a light-duty gravel road serving local farms. The bridge dates to about 1878. It is considered a typical example of the small timber bridges that were built throughout the county in the second half of the nineteenth century. Simple timber construction let neighboring farmers maintain it themselves. Of the three covered timber bridges still actively maintained in Snyder County, it has kept the most of its original character. Its rural setting has changed little, and it remains in excellent, unaltered condition compared with the other two, which carry a heavier asphalt highway and a busy state road.","period_of_significance":"c. 1878","architect_builder":null,"architectural_style":"Burr arch (timber Burr truss)","criteria":[],"status_note":"Actively maintained; described as in good condition and unaltered.","vacant_flag":false,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:30.804724-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/77001194.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/77001194/dba94c450c-800.webp","url_1600":"https://nationalhistoricalregister.com/media/77001194/dba94c450c-1600.webp","licence":"CC BY-SA 2.0","author":"Doug Kerr","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Gross_Covered_Bridge_1.jpg\" rel=\"noopener\">Doug Kerr</a>, <a href=\"https://creativecommons.org/licenses/by-sa/2.0\" rel=\"license noopener\">CC BY-SA 2.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Gross_Covered_Bridge_1.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71993836","wikipedia":"https://en.wikipedia.org/wiki/Gross_Covered_Bridge","wikidata":"https://www.wikidata.org/wiki/Q5610467"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/snyder-county/gross-bridge-77001194/"}