{"nrhp_refnum":"78001916","name":"Van Wyck-Lefferts Tide Mill","other_names":[],"category":"building","location":{"address":"2 mi. NE of Mill and Southdown Rds.","address_restricted":false,"city":"Lloyd Harbor","county":"Suffolk County","state":"NY","lat":40.89975274100004,"lon":-73.44458708699995,"geom_source":"nps_gis"},"listed_date":"1978-12-27","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry","Engineering","Architecture"],"significance_levels":["state"],"summary":{"what_it_is":"A 3½-story, gable-roofed, timber-framed grist mill built as a tide mill in Lloyd Harbor, Town of Huntington, Suffolk County, New York, between 1793 and 1797 by Abraham Van Wyck. It measures 38 by 30 feet and sits on a 2-acre site with a mill dam and pond.","why_significant":"The nomination calls it the best surviving example on Long Island of a tide mill with its original machinery. It operated until the late nineteenth century and is described as highly significant for its structural and technological integrity. The building was measured and recorded by the Historic American Engineering Record in 1975.","narrative":"Built between 1793 and 1797 by Abraham Van Wyck, this tide-powered grist mill in Lloyd Harbor, Suffolk County, is a 3½-story, timber-framed building with a gable roof, measuring 38 by 30 feet. It has changed little since the early nineteenth century. An earthen mill dam with sluice gates survives intact beside it, and the 2-acre site lies next to Mill Cove Pond and Huntington Harbor. Inside, much of the original machinery remains, including a drive system on a hurst frame, two pairs of French burr millstones, and a belt system that ran screeners, a smutter and a cup elevator. Two horses carry decorative turnings stamped with Van Wyck's name. The undershot water wheel was removed after 1929. The mill operated until the late nineteenth century and is regarded as the best surviving Long Island tide mill with its original machinery. Its structural and technological integrity led to its recording by the Historic American Engineering Record in 1975. It is now vacant and in fair condition.","period_of_significance":null,"architect_builder":"Builder: Abraham Van Wyck","architectural_style":null,"criteria":[],"status_note":"Listed as vacant, in fair condition, on its original site; deterioration is named as a threat. The undershot water wheel was removed after 1929.","vacant_flag":true,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:50:39.633825-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/78001916.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/78001916/8de79c0763-800.webp","url_1600":"https://nationalhistoricalregister.com/media/78001916/8de79c0763-1600.webp","licence":"Public domain","author":"Related names: Lefferts, Jarvis Van Wyck, Abraham Van Wyck, Abraham Wortman, Coles Ansteth, W Richard Daniels, Christine M Yearby, Jean P","credit_html":"Related names: Lefferts, Jarvis Van Wyck, Abraham Van Wyck, Abraham Wortman, Coles Ansteth, W Richard Daniels, Christine M Yearby, Jean P, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:EXTERIOR,_LOOKING_NORTHWEST_-_Lefferts_Tide_Mill,_Huntington_Harbor,_Southdown_Road,_Huntington,_Suffolk_County,_NY_HAER_NY,52-LOHA,2-2.tif"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75314865","wikipedia":"https://en.wikipedia.org/wiki/Van_Wyck-Lefferts_Tide_Mill","wikidata":"https://www.wikidata.org/wiki/Q7913783"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/suffolk-county/van-wyck-lefferts-tide-mill-78001916/"}