{"nrhp_refnum":"06000013","name":"Concourse Yard Substation","other_names":[],"category":"structure","location":{"address":"3119 Jerome Ave.","address_restricted":false,"city":"Bronx","county":"The Bronx","state":"NY","lat":40.87498248300005,"lon":-73.88889626199995,"geom_source":"nps_gis"},"listed_date":"2006-02-09","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Transportation","Architecture","Engineering","Community Planning and Development"],"significance_levels":["local"],"summary":{"what_it_is":"A single-story, double-height brick and limestone substation at 3119 Jerome Avenue in the Kingsbridge neighborhood of the Bronx, built in 1933 as part of the IND subway system's Concourse Yard.","why_significant":"The substation is significant for transportation and community planning and development (Criterion A), and for engineering and architecture (Criterion C). It shows how the city-owned IND system converted purchased alternating current into direct current for the trains. Its Art Deco facade is typical of IND substations and hides the building's function.","narrative":"Built in 1933 at 3119 Jerome Avenue in the Kingsbridge section of the Bronx, this substation serves the Concourse Yard, one of four IND subway yards. Its job was to convert high-voltage alternating current bought from Con Edison into the low-voltage direct current that powers the trains through the third rail. The building is a windowless masonry structure, about 50 by 100 feet, with a symmetrical eastern facade of brown brick laid in diamond patterns, a limestone frieze and a monumental portal. Aluminum doors are embossed with geometric motifs, and the limestone surround carries the lettering \"City of New York Concourse Yard Substation.\" Inside, an original Cleveland overhead crane, circuit breaker panels, mercury rectifiers and signal transformers survive, although solid state rectifiers have replaced the rotary converters. The substation was listed for its role in subway transportation and power engineering and for its Art Deco design, and it retains a relatively high degree of integrity.","period_of_significance":"1933","architect_builder":"Ridgeway, Robert (Engineer)","architectural_style":"Modern Movement/Art Deco","criteria":["A","C"],"status_note":"Still used for rail-related power; much original equipment has been removed and replaced with modern equipment, including solid state rectifiers, though some original equipment remains.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:51:52.60099-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/06000013.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/06000013/66cf7d0736-800.webp","url_1600":"https://nationalhistoricalregister.com/media/06000013/66cf7d0736-1600.webp","licence":"CC BY-SA 3.0","author":"ALT55-VictorM","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Concourse_Yard_Substation,_3119_Jerome_Ave._Kingsbridge,_Bronx_County,_New_York.JPG\" rel=\"noopener\">ALT55-VictorM</a>, <a href=\"https://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:Concourse_Yard_Substation,_3119_Jerome_Ave._Kingsbridge,_Bronx_County,_New_York.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75312114","wikipedia":"https://en.wikipedia.org/wiki/Concourse_Yard_Substation","wikidata":"https://www.wikidata.org/wiki/Q137189804"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/the-bronx/concourse-yard-substation-06000013/"}