Question: USS Mahan was laid down at which shipyard located at Hunters Point?
Context: Hunters Point Avenue is a station on the IRT Flushing Line of the New York City Subway.  Located at 49th Avenue (Hunters Point Avenue) and 21st Street in Long Island City, Queens, it is served by the 7 train at all times and the <7> train during rush hours in the peak direction. Hunters Point is an unincorporated community in Apache County, Arizona, United States.  Hunters Point is 9 mi south-southwest of Window Rock.  Hunters Point is located at the south of Black Creek Valley, adjacent south-flowing Black Creek, a north tributary to the southwest-flowing Puerco River. The San Francisco Naval Shipyard was a United States Navy shipyard in San Francisco, located on 638 acre of waterfront at Hunters Point in the southeast corner of the city. The San Francisco Bay Naval Shipyard was a short-lived shipyard formed in 1965 as the combination of the San Francisco Naval Shipyard (aka Hunters Point) and the Mare Island Naval Shipyard.  The combined yards were the largest naval shipyard in the world, but the desired cost savings did not materialize, and the two yards reverted to separate existences in February 1970.  The shipyard was used for radioactive testing when the United States was testing the atomic bomb.  The site has since been contaminated.  Now the Hunters Point Naval Shipyard is a Superfund site, as designated by the Environmental Protection Agency (EPA).  It is the Navy's job to clean up the site to "reasonable" levels to those who live adjacent to the shipyard. Philly Shipyard, formerly Aker Philadelphia Shipyard, is a commercial shipyard located in Philadelphia, Pennsylvania, United States on part of the site of the Philadelphia Naval Shipyard.  The commercial yard began after the United States Navy had ended most of its operations at the site. Candlestick Point State Recreation Area (or simply Candlestick Point) is a state park unit of California, USA, providing an urban protected area on San Francisco Bay.  The park is located at the southeastern tip of San Francisco immediately south of Hunters Point and 2 mi north of Sierra Point in Brisbane.  This 170 acre landfilled area was intended to be used during World War II as a shipyard by the United States Navy.  However it was abandoned as the war ended.  Without government controls, the area was used by nearby residences as a garbage dump.  In 1973 the California State Legislature purchased the land with $10 million and in 1977 voted to turn this area into a state recreation area.  After the designation Candlestick became the first urban recreation area in the state.  To this day Candlestick remains as a major recreation area in San Francisco, offering a wide view of the bay.  The park features various picnic areas, two fishing piers, fitness courses as well as hiking trails.  This park is also a popular area for windsurfing because of strong wind. USS "Mahan" (DDG-42), was a "Farragut"-class guided missile destroyer in the United States Navy.  She was named for Rear Admiral Alfred Thayer Mahan USN (1840–1914).  The ship was Laid down as DLG-11 by the San Francisco Naval Shipyard on 31 July 1957 and launched on 7 October 1959.  "Mahan" was sponsored by Mrs. H. P. Smith, wife of Vice Adm. Harold Page Smith, and commissioned on 25 December 1960.  "Mahan" was reclassified as a guided missile destroyer on 30 June 1975 and designated DDG-42.  USS "Mahan" was decommissioned on 15 June 1993 and stricken from the Naval Vessel Register on the same day. The Niles Canyon Railway (NCRy) is a heritage railway running through Niles Canyon, between Sunol and the Niles district of Fremont in the East Bay of the San Francisco Bay Area, in California, United States.  The railway is listed on the National Register of Historic Places as the Niles Canyon Transcontinental Railroad Historic District.  The railroad is operated and maintained by the Pacific Locomotive Association which preserves, restores and operates historic railroad equipment.  The NCRy features public excursions with both steam and diesel locomotives along a well-preserved portion of the First Transcontinental Railroad.  The Golden Gate Railroad Museum moved its collection from San Francisco to the NCRy in 2007 for storage and limited operations after their home at Hunters Point Naval Shipyard was shut down for redevelopment. The Portsmouth Naval Shipyard Museum and the associated Lightship Museum are located on the downtown Portsmouth, Virginia, United States waterfront.  The museum covers the 250+ year relationship with the shipyard - America's oldest and largest naval shipyard located on the Portsmouth Waterfront.  The city and the shipyard have been intertwined since the founding of the Gosport Shipyard in 1767, which was later renamed Norfolk Navy Yard and finally Norfolk Naval Shipyard.  This rich history is told through exhibits, hands-on programs and special events. Bayview-Hunters Point or The Bayview, is a neighborhood in the southeastern corner of San Francisco, California, United States.  The decommissioned Hunters Point Naval Shipyard is located within its boundaries and Candlestick Park, which was demolished in 2015, was on the southern edge.
Answer: San Francisco Naval Shipyard