{"nrhp_refnum":"87001465","name":"Edgartown Harbor Light","other_names":[],"category":"structure","location":{"address":"Off N. Water St.","address_restricted":false,"city":"Edgartown","county":"Dukes County","state":"MA","lat":41.392514292000044,"lon":-70.50537478299998,"geom_source":"nps_gis"},"listed_date":"1987-06-15","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Transportation","Architecture","Maritime History"],"significance_levels":["state"],"summary":{"what_it_is":"A 1875 cast iron cylindrical lighthouse tower on the west side of Edgartown's inner harbor, off North Water Street in Edgartown, Massachusetts. It was moved to this site from Ipswich in 1939.","why_significant":"The tower is a well preserved example of the cast iron lights typical of its period and is tied to the development of aids to navigation in Massachusetts. Although the 1939 move cost it integrity of location, it still marks a site that has had a beacon since 1828. The move was also notable because it answered local opposition to replacing a traditional light with a modern steel skeleton tower.","narrative":"Edgartown Harbor Light is a white cast iron lighthouse on the western side of Edgartown's inner harbor, opposite Chappaquiddick Island. The tower dates to 1875 and rests on a granite block foundation topped by an octagonal concrete base. Its four rings of cast iron plates have windows with Italianate surrounds, and twelve open brackets support the balcony beneath a ten-sided lens room. A beacon has marked this spot since 1828, when a combined dwelling and light was built on a platform at the harbor entrance. That wooden structure was later replaced by the current tower, which was floated by barge from Ipswich in 1939. The move answered local opposition to replacing a traditional light with a steel skeleton tower. Because it was relocated, the light lost integrity of location, yet it keeps its design, materials and workmanship. It was listed for its link to navigational aids in Massachusetts and as a well preserved cast iron light of its era. The form describes it as unmanned and active.","period_of_significance":null,"architect_builder":null,"architectural_style":"Cast iron cylindrical tower with Italianate window surrounds and bracket details","criteria":["A","C"],"status_note":"Listed as unmanned and active, owned by the U.S. Coast Guard at the time of the form.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:13:01.213327-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/95/7897/63789795/content/electronic-records/rg-079/NPS_MA/87001465.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/87001465/c61f5ebc54-800.webp","url_1600":"https://nationalhistoricalregister.com/media/87001465/c61f5ebc54-1600.webp","licence":"CC BY-SA 3.0","author":"Williamwaterway","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Edgartown_Harbor_Light_-_New_Paint_1988.jpg\" rel=\"noopener\">Williamwaterway</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:Edgartown_Harbor_Light_-_New_Paint_1988.jpg"},"district":{"nrhp_refnum":"83003967","name":"Edgartown Village Historic District","url":"https://nationalhistoricalregister.com/districts/massachusetts/edgartown-village-historic-district-83003967/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/63789795","wikipedia":"https://en.wikipedia.org/wiki/Edgartown_Harbor_Light","wikidata":"https://www.wikidata.org/wiki/Q5337606"},"indexable":true,"url":"https://nationalhistoricalregister.com/massachusetts/dukes-county/edgartown-harbor-light-87001465/"}