{"nrhp_refnum":"78001923","name":"Bridge L-158","other_names":["Bridge L-158,New York and Mahopac Railroad"],"category":"structure","location":{"address":"W of Goldens Bridge at Croton River","address_restricted":false,"city":"Goldens Bridge","county":"Westchester County","state":"NY","lat":41.29635757400007,"lon":-73.68255714299994,"geom_source":"nps_gis"},"listed_date":"1978-11-29","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Transportation"],"significance_levels":["state"],"summary":{"what_it_is":"Bridge L-158 is an iron double-intersection Whipple through truss railroad bridge on the abandoned New York and Mahopac Branch right-of-way near Goldens Bridge, Westchester County, New York. It was built in 1883 and moved to this site in 1904.","why_significant":"It is described as the only known double-intersection Whipple truss railroad bridge surviving in New York State. It is technologically significant for its prefabricated iron Phoenix columns, and its patented truss design is tied to engineer Squire Whipple. Its 1904 relocation illustrates the reuse and downgrading of iron bridges in the nineteenth century.","narrative":"Spanning the Muscoot Reservoir near Goldens Bridge, Bridge L-158 is a 163-foot iron railroad truss with a long travelling history. It was built in 1883 as the shortest of three spans carrying the New York, West Shore and Buffalo Railroad over Rondout Creek in Ulster County. In 1904, as New York City built the New Croton Water Supply System, it was moved to Westchester County and narrowed from double-track to single-track width for the New York and Mahopac Branch. Trains used it until about 1960. Its design follows a double-intersection truss patented by Squire Whipple in 1846, and its compression members use prefabricated Phoenix columns, a notable nineteenth-century bridge-building advance. It is considered the only surviving example of this railroad truss type in New York. The bridge was measured and drawn in 1976 for the Historic American Engineering Record and remains structurally sound, though abandoned.","period_of_significance":"1800-1899","architect_builder":"Clarke, Reeves, and Company (manufacturer, a subsidiary of the Phoenix Iron Company); originally erected by the North River Construction Company in 1883","architectural_style":null,"criteria":[],"status_note":"Abandoned since the New York and Mahopac ceased operation about 1960; in sound structural condition despite lack of maintenance; listed as unoccupied.","vacant_flag":true,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:50:38.796139-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/78001923.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/78001923/db25491385-800.webp","url_1600":"https://nationalhistoricalregister.com/media/78001923/db25491385-1600.webp","licence":"CC BY-SA 3.0","author":"Daniel Case","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Bridge_L-158,_Goldens_Bridge,_NY.jpg\" rel=\"noopener\">Daniel Case</a>, <a href=\"http://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:Bridge_L-158,_Goldens_Bridge,_NY.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75322969","wikipedia":"https://en.wikipedia.org/wiki/Bridge_L-158","wikidata":"https://www.wikidata.org/wiki/Q913612"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/westchester-county/bridge-l-158-78001923/"}