{"nrhp_refnum":"88000773","name":"Bridge in Lykens Township No. 1","other_names":[],"category":"structure","location":{"address":"LR 22001 over Pine Creek","address_restricted":false,"city":"Edman","county":"Dauphin County","state":"PA","lat":40.64394855100005,"lon":-76.69251570499995,"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 three-span stone bridge carrying a vehicular road across Pine Creek in Lykens Township near Erdman, Dauphin County, Pennsylvania. The form gives no construction date from the bridge itself and no designer or builder.","why_significant":"The nomination argues the bridge is significant for its engineering, with precisely laid coursed rubble voussoirs contributing to its engineering quality. It is described as one of the most gracefully designed and executed multi-span bridges in south central Pennsylvania. Its integrity is described as high despite concrete reinforcement of the center pier and the inner surface of one parapet.","narrative":"A multi-span stone bridge with three arches crosses Pine Creek in Lykens Township, near Erdman in Dauphin County. The structure has a central span of 34 feet and a secondary span of 33 feet, with a total length of 127 feet and a width of about 25 feet. Its arches are built of coursed rubble stone, and the voussoirs are precisely laid, giving the masonry a notable level of craftsmanship. The bridge is listed for its engineering quality. Its high rise and moderately low spans are regarded as among the most gracefully designed and executed multi-span bridges in south central Pennsylvania. Concrete reinforcement has been added to the center pier and to the inner face of one parapet, and the wall on the west side was replaced with concrete. Even with these changes, the nomination treats the bridge's integrity as high. The construction date is given as approximately 1850 to 1875, based on information from state staff rather than the bridge itself.","period_of_significance":null,"architect_builder":null,"architectural_style":null,"criteria":[],"status_note":"Vehicular use; the form describes the bridge as altered with a concrete pier, concrete parapet and concrete reinforcement.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:35.71975-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/88000773.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/88000773/893934361c-800.webp","url_1600":"https://nationalhistoricalregister.com/media/88000773/893934361c-1600.webp","licence":"Public domain","author":"PennDOT","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Bridge_in_Lykens_Township_No._1.jpg\" rel=\"noopener\">PennDOT</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Bridge_in_Lykens_Township_No._1.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71992872","wikipedia":"https://en.wikipedia.org/wiki/Bridge_in_Lykens_Township_No._1","wikidata":"https://www.wikidata.org/wiki/Q4966364"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/dauphin-county/bridge-in-lykens-township-no-1-88000773/"}