{"nrhp_refnum":"98000352","name":"Haviland-Davison Grist Mill","other_names":[],"category":"building","location":{"address":"Jct. of Wood and Denton Aves.","address_restricted":false,"city":"East Rockaway","county":"Nassau County","state":"NY","lat":40.646471777000045,"lon":-73.66321514999998,"geom_source":"nps_gis"},"listed_date":"1998-04-21","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A two-and-one-half story former tide-powered grist mill, built c. 1689 and now in Memorial Park, East Rockaway, Nassau County, New York, where it was relocated in 1963. Its builder is not named in the form's architect field, though the 1688 town grant was to Joseph Haviland.","why_significant":"The nomination argues the mill is significant under Criterion C for architecture. Its original section keeps a massive hand-hewn six-post timber frame typical of First Period (pre-1720) construction on Long Island. Later additions show how the mill changed in use over time. It is also tied to local commerce, having been one of the region's earliest mills.","narrative":"Grist Mill in East Rockaway, New York, dates to about 1689, soon after the Town of Hempstead granted Joseph Haviland permission in 1688 to build a mill on the Rockaway swamp stream. Power came from the tides. The building has a T-shaped plan made up of the original core and three later additions. The original section keeps a hand-hewn six-post frame with incised Roman numeral marks, large girts and joists, and cross bracing near the former millstone bay. A sawn-timber extension followed in the early to mid nineteenth century, then a north wing and a turn-of-the-century wing, the latter rebuilt after a 1990 fire. The Davison family owned the mill from 1818 and later moved it to a lumber yard as a storage shed. Threatened by development in 1962, it was bought by the village, moved to Memorial Park in 1963, restored, and opened as a museum in 1964. Its significance rests on its early timber framing and its record of changing use.","period_of_significance":"c. 1689 - c. 1900","architect_builder":"unknown","architectural_style":"Colonial: Post-medieval English","criteria":["C"],"status_note":"Operated as the Grist Mill Museum since 1964 in a municipal park; the 1990 fire-damaged Section D was reconstructed.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:51:51.242796-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/98000352.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/98000352/d6b298d9e3-800.webp","url_1600":"https://nationalhistoricalregister.com/media/98000352/d6b298d9e3-1600.webp","licence":"CC BY-SA 4.0","author":"DanTD","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Haviland-Davison_Grist_Mill-5.JPG\" rel=\"noopener\">DanTD</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:Haviland-Davison_Grist_Mill-5.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75319115","wikipedia":"https://en.wikipedia.org/wiki/Haviland-Davison_Grist_Mill","wikidata":"https://www.wikidata.org/wiki/Q5683931"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/nassau-county/haviland-davison-grist-mill-98000352/"}