{"nrhp_refnum":"79002280","name":"Switcher No. 1670","other_names":[],"category":"structure","location":{"address":"E of Strasburg","address_restricted":false,"city":"Strasburg","county":"Lancaster County","state":"PA","lat":39.982416870000066,"lon":-76.16077163499995,"geom_source":"nps_gis"},"listed_date":"1979-12-17","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Commerce","Transportation","Invention"],"significance_levels":["national"],"summary":{"what_it_is":"A 1916 Class B6sb six-wheel (0-6-0) yard switcher locomotive, Switcher #1670, built at the Pennsylvania Railroad's Juniata Shops and held at Strasburg, Lancaster County, Pennsylvania. It is one of the Pennsylvania Railroad rolling stock resources listed as a thematic group.","why_significant":"The nomination describes the B6 as the most common style of twentieth-century American yard engine and the workhorse of the yards, with the last working engine removed from the roster in 1957. It states that Switcher #1670 is the only known example of this class. The locomotive is presented as part of a varied group of historically significant rolling stock, and the form notes that all of the cars in the group are genuine rather than replicas.","narrative":"Built at the Pennsylvania Railroad's Juniata Shops in February 1916, Switcher #1670 is a Class B6sb six-wheel yard engine with a 0-6-0 wheel arrangement. The B6sb was an updated version of the B6, and more than 238 were built at Juniata between 1916 and 1926. The B6 type served as the workhorse of railroad yards, and the last working example was removed from the roster in 1957. Switcher #1670 is recorded as the only surviving example of its class. It is held at Strasburg, Lancaster County, as part of a group of Pennsylvania Railroad rolling stock that was entered on the National Register as a thematic resource. The group includes passenger, freight and switching locomotives and several cars, including an 1855 Cumberland car and an 1886 coach. The locomotive is significant because it preserves an engine type that otherwise survives only in the form of this single example.","period_of_significance":"1916","architect_builder":"Juniata Shops, Pennsylvania Railroad","architectural_style":null,"criteria":[],"status_note":null,"vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:33.936969-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/79002280.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/79002280/244cca31be-800.webp","url_1600":"https://nationalhistoricalregister.com/media/79002280/244cca31be-1600.webp","licence":"CC BY-SA 4.0","author":"Photo by and (c)2016 Derek Ramsey (Ram-Man)","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:RR79.40.7A_No._1670_Front_Side.jpg\" rel=\"noopener\">Photo by and (c)2016 Derek Ramsey (Ram-Man)</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:RR79.40.7A_No._1670_Front_Side.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71993153","wikipedia":null,"wikidata":"https://www.wikidata.org/wiki/Q79451636"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/lancaster-county/switcher-no-1670-79002280/"}