{"nrhp_refnum":"12000424","name":"Drydock 4 Hunters Point Naval Shipyard","other_names":[],"category":"structure","location":{"address":"SE. of jct. of Spear Ave. & Morrell St.","address_restricted":false,"city":"San Francisco","county":"San Francisco","state":"CA","lat":37.72462851100005,"lon":-122.36383963898305,"geom_source":"nps_gis"},"listed_date":"2012-07-25","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Military","Engineering"],"significance_levels":["national"],"summary":{"what_it_is":"Drydock 4 is a reinforced-concrete graving dock at the former Hunters Point Naval Shipyard in San Francisco, California. It measures 1,096 feet long, 171 feet wide and 53 feet deep and was completed in June 1943.","why_significant":"The nomination argues it is nationally significant under Criterion A as the largest West Coast drydock, a key World War II facility for repairing Pacific Fleet ships. It is also significant under Criterion C as an example of wartime maritime engineering, built in about ten months after a 200-foot hill was leveled and 560,000 cubic yards of rock removed.","narrative":"Drydock 4 is a massive reinforced-concrete graving dock on the San Francisco Bay shoreline at Hunters Point, completed in June 1943. Measuring 1,096 feet long, 171 feet wide and 53 feet deep, it was the largest drydock on the Pacific Coast when finished and could service any vessel in the fleet. Its construction took about ten months and required leveling a 200-foot hill, Point Avisadero, and removing 560,000 cubic yards of rock. Pacific Bridge Company was the main contractor, working with soil engineer Charles H. Lee and the firm Dames & Moore. During World War II the dock repaired battle-damaged ships, including the aircraft carrier USS Intrepid three times, and in 1945 helped load components of the atomic bombs carried by the USS Indianapolis. Pump rooms, capstans, bollards, cleats and crane tracks survive. It was listed for its military importance and for its role as an example of rapid wartime engineering, with a period of significance of 1942 to 1945.","period_of_significance":"1942-1945","architect_builder":"Pacific Bridge Company; Lee, Charles H.; Dames & Moore; Piombo Brothers and Basalt Rock Company","architectural_style":"Other: utilitarian","criteria":["A","C"],"status_note":"Current function is listed as non-operational; the drydock is presently inundated and retains a high degree of integrity despite several alterations.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:29.754941-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/12000424.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/12000424/f418a09849-800.webp","url_1600":"https://nationalhistoricalregister.com/media/12000424/f418a09849-1600.webp","licence":"CC BY-SA 3.0","author":"Sanfranman59","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Drydock_4_Hunters_Point_Naval_Shipyard,_San_Francisco,_CA_11-4-2012_3-54-26_PM.JPG\" rel=\"noopener\">Sanfranman59</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:Drydock_4_Hunters_Point_Naval_Shipyard,_San_Francisco,_CA_11-4-2012_3-54-26_PM.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123861089","wikipedia":null,"wikidata":"https://www.wikidata.org/wiki/Q133464852"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/san-francisco/drydock-4-hunters-point-naval-shipyard-12000424/"}