{"nrhp_refnum":"80003397","name":"Jacks Mountain Covered Bridge","other_names":[],"category":"structure","location":{"address":"SW of Fairfield on LR 01053, Hamiltonban Township","address_restricted":false,"city":"Iron Springs","county":"Adams County","state":"PA","lat":39.76716136500005,"lon":-77.38670477199997,"geom_source":"nps_gis"},"listed_date":"1980-08-25","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Transportation"],"significance_levels":["state"],"summary":{"what_it_is":"A Burr truss covered bridge carrying a road over Tom's Creek in Hamiltonban Township, Adams County, Pennsylvania, near Iron Springs. It was built in 1890 and is owned by the Pennsylvania Department of Transportation.","why_significant":"The nomination treats the bridge as one of the covered bridges of Adams County listed as part of a multiple-property group. Its features include horizontal narrow siding, stone abutments, wide longitudinally laid plank flooring, a tin-covered gable roof, and burr trusses that reach almost to eave level. The form states the bridge appears to be in excellent condition.","narrative":"A Burr truss covered bridge spanning Tom's Creek in Hamiltonban Township, Adams County, Pennsylvania, near Iron Springs. Built in 1890 by Joseph Smith, it measures 75 feet in length and 14 feet 6 inches in width, with a clearance of 13 feet 11 inches. Its construction includes stone abutments, horizontal narrow siding, and wide plank flooring laid lengthwise. The gable roof is covered in tin, and the trusses rise nearly to eave level. The bridge is owned by the Pennsylvania Department of Transportation and is described as being in excellent condition. It is one of several covered bridges in Adams County considered together in a group nomination, which reviewers found eligible for the register. The documentation also addressed the effect of strengthening repairs on the bridge's integrity, and the bridge's wooden structure remains the core of its historic value.","period_of_significance":null,"architect_builder":"Joseph Smith (builder)","architectural_style":null,"criteria":[],"status_note":"The form states the bridge appears to be in excellent condition.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:32.641311-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/80003397.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/80003397/577967b5bb-800.webp","url_1600":"https://nationalhistoricalregister.com/media/80003397/577967b5bb-1600.webp","licence":"CC0","author":"Smallbones","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Jacks_Mtn_Covered_Bridge_AdamsCo_PA.JPG\" rel=\"noopener\">Smallbones</a>, <a href=\"http://creativecommons.org/publicdomain/zero/1.0/deed.en\" rel=\"license noopener\">CC0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Jacks_Mtn_Covered_Bridge_AdamsCo_PA.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71992110","wikipedia":"https://en.wikipedia.org/wiki/Jacks_Mountain_Covered_Bridge","wikidata":"https://www.wikidata.org/wiki/Q6116844"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/adams-county/jacks-mountain-covered-bridge-80003397/"}