{"nrhp_refnum":"07000094","name":"Execution Rocks Light Station","other_names":[],"category":"structure","location":{"address":"In Long Island Sound, 0.9 mi. NNW of N end of NY 101 in Nassau Co.","address_restricted":false,"city":"Port Washington","county":"Nassau County","state":"NY","lat":40.878111029000024,"lon":-73.73764323599994,"geom_source":"nps_gis"},"listed_date":"2007-02-23","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Maritime History","Transportation","Architecture","Engineering"],"significance_levels":["local"],"summary":{"what_it_is":"A lighthouse station on an artificial island in western Long Island Sound, about 0.9 mile north-northwest of Port Washington, Nassau County, New York. The lighthouse was built in 1848-1849 and first lit in 1850, with a keepers' dwelling added in 1867-1868.","why_significant":"The nomination presents the station as a wave-swept granite tower lighthouse designed by Alexander Parris to mark the hazardous Execution Rocks shoal near the shipping route to the port of New York. It also documents the evolution of the light station, including the keepers' dwelling, fog signals and the gradually enlarged artificial island.","narrative":"Execution Rocks Light Station sits on a small artificial island of about 0.3 acre in western Long Island Sound, roughly 0.9 mile north-northwest of Port Washington. It marks a rocky shoal that has endangered ships since colonial times, close to the route into the port of New York. The conical granite lighthouse was built in 1848-1849 and first lit in 1850. It is 72 feet tall overall and was designed by Alexander Parris as a wave-swept tower, originally standing alone in the water. Riprap was added around it over many decades, forming the present island. A two-and-one-half-story Gothic Revival granite keepers' dwelling was built in 1867-1868 and later joined to the tower by a short passage. The station also has foundations of demolished fog signal and oil buildings. It remains an automated Coast Guard navigation aid with a modern optic, fog signal and radar beacon, reachable only by boat.","period_of_significance":null,"architect_builder":"Alexander Parris (designer of the lighthouse)","architectural_style":"Gothic Revival (keepers' dwelling); wave-swept tower lighthouse type; classified as Mid-19th century / Gothic","criteria":[],"status_note":"Owned by the U.S. Coast Guard and operated as an automated aid to navigation; the keepers' dwelling rooms are vacant with peeling paint.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:51:53.60832-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_AK/07000094.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/07000094/087c023827-800.webp","url_1600":"https://nationalhistoricalregister.com/media/07000094/087c023827-1600.webp","licence":"Public domain","author":"NOAA Historical Collection.","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Line4046_-_Flickr_-_NOAA_Photo_Library.jpg\" rel=\"noopener\">NOAA Historical Collection.</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Line4046_-_Flickr_-_NOAA_Photo_Library.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75325127","wikipedia":"https://en.wikipedia.org/wiki/Execution_Rocks_Light","wikidata":"https://www.wikidata.org/wiki/Q5419772"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/nassau-county/execution-rocks-light-station-07000094/"}