{"nrhp_refnum":"96001058","name":"Mare Island Historic District(Boundary Increase)","other_names":["Mare Island Naval Shipyard"],"category":"district","location":{"address":"Roughly bounded by Mare Island Straight, Causeway St., Cedar Ave., Mesa Rd., Ribeiro Rd., and Tyler Rd.","address_restricted":false,"city":"Vallejo","county":"Solano County","state":"CA","lat":38.086620321000055,"lon":-122.26569518699995,"geom_source":"nps_gis"},"listed_date":"1997-01-21","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Military","Architecture","Engineering","Historic - Non-Aboriginal"],"significance_levels":["national"],"summary":{"what_it_is":"A large naval shipyard historic district at Mare Island in Vallejo, Solano County, California, covering about 980 acres, roughly 65 percent of Mare Island Naval Shipyard, which the U.S. Navy has operated since 1854.","why_significant":"The nomination argues the district represents nearly a century of naval activity at the oldest shipyard and naval facility on the West Coast. It is significant for military history, industrial history, architecture and engineering, and historic archeology. The revised boundary adds World War II-era properties, described as the most important period in the base's military history, and fills gaps between earlier smaller districts.","narrative":"Mare Island Naval Shipyard in Vallejo, California, has been a U.S. Navy ship building and repair facility since 1854, and its historic district covers about 980 acres of the base. The district holds hundreds of buildings, structures, landscape areas and an archeological site. They include early shipyard workshops, huge twentieth-century shop buildings, an ammunition depot, a naval hospital, Marine barracks, a submarine base, a cemetery, parks, and housing ranging from officers' mansions to civilian cottages. The nomination presents this variety as the district's defining trait, reflecting a naval community comparable to a small municipality. It replaces earlier, smaller districts defined by a National Historic Landmark designation and a 1980s survey by adding World War II properties and many small ancillary buildings. The district is significant for military and industrial history, architecture and engineering, and historic archeology, with a period of significance from 1854 to 1945. Areas dominated by post-1945 construction were left out of the boundaries.","period_of_significance":"1854-1945","architect_builder":null,"architectural_style":"Greek Revival, Queen Anne, Colonial Revival, Moderne, Mission/Spanish Colonial Revival, Renaissance Revival","criteria":[],"status_note":null,"vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:27.706718-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/96001058.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/96001058/45b53b4b44-800.webp","url_1600":"https://nationalhistoricalregister.com/media/96001058/45b53b4b44-1600.webp","licence":"Public domain","author":null,"credit_html":"Unknown author, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:USS_Wadleigh_(DD-689)_at_the_Mare_Island_Naval_Shipyard,_California_(USA),_on_10_April_1945_(NH_98906).jpg"},"district":{"nrhp_refnum":"75002103","name":"Mare Island Naval Shipyard","url":"https://nationalhistoricalregister.com/districts/california/mare-island-naval-shipyard-75002103/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123862015","wikipedia":"https://en.wikipedia.org/wiki/Mare_Island_Naval_Shipyard","wikidata":"https://www.wikidata.org/wiki/Q657784"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/solano-county/mare-island-historic-district-boundary-increase-96001058/"}