{"nrhp_refnum":"05000680","name":"Substation #401","other_names":["Old Essex Substation","BMT Substation #2"],"category":"structure","location":{"address":"3046 Fulton St. bet. Essex St. and Shepherd Ave.","address_restricted":false,"city":"Brooklyn","county":"Brooklyn","state":"NY","lat":40.68025258100005,"lon":-73.88266922599996,"geom_source":"nps_gis"},"listed_date":"2005-07-06","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Transportation","Architecture","Engineering","Community Planning and Development","Social History"],"significance_levels":["local"],"summary":{"what_it_is":"A brick electrical substation at 3046 Fulton Street in the Highland Park area of Brooklyn, built from 1901 and operating from 1903 to power Brooklyn Heights Railroad trolley and elevated lines, later part of the BRT and BMT system.","why_significant":"It is significant under Criterion A for transportation, community planning and development, and social history, and under Criterion C for engineering and architectural design. It supplied power to early Brooklyn rail lines and shares design elements with later subway substations, reflecting the influence of designer Thomas E. Murray. Its interior remains largely intact apart from the removed rotary converters, and its central skylight is described as of exceptional quality.","narrative":"Substation #401, also called the Old Essex Substation, is a double-height brick building at 3046 Fulton Street in Brooklyn, beside the elevated BMT Jamaica Line. Construction began in 1901 and it started operating in 1903, converting high-voltage alternating current into the low-voltage direct current used to run trains. It first powered the Brooklyn Heights Railroad, which was absorbed into the BRT by 1904, and later served the BMT. Thomas E. Murray designed it, and its monumental arched portal and banded interior tiling anticipate later subway substations. The facade uses buff and yellow brick, and the interior has a large steel and glass skylight, terra cotta ceiling tiles and an original bridge crane. The rotary converters were removed in the early 1980s after a newer substation took over its work. The building now serves as crew quarters and offices, and water damage has left the facade deteriorated and covered by scaffolding.","period_of_significance":"1901-1923","architect_builder":"Murray, Thomas E. (Designer)","architectural_style":"Late 19th & 20th Century Revivals/Beaux-Arts","criteria":["A","C"],"status_note":"Decommissioned in the early 1980s; now used as crew quarters and offices (Power Group Zone II Office). The facade is deteriorated by water damage and covered with scaffolding.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:51:52.610072-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/05000680.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/05000680/0b1b145605-800.webp","url_1600":"https://nationalhistoricalregister.com/media/05000680/0b1b145605-1600.webp","licence":"CC BY-SA 3.0","author":"Smallbones","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Brooklyn_sub-station_2.JPG\" rel=\"noopener\">Smallbones</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:Brooklyn_sub-station_2.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75313341","wikipedia":"https://en.wikipedia.org/wiki/Substation_401","wikidata":"https://www.wikidata.org/wiki/Q7632101"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/brooklyn/substation-401-05000680/"}