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Hunter's Point Crane
The Hunter's Point crane is a gantry crane located at the naval shipyard in Hunters Point, San Francisco. When it was built, in 1947 to repair battleships and aircraft carriers, it was the largest crane in the world. It has a capacity and was completed at the site by the American Bridge Company. When it was first built, it was used to lift 630 tons, which the San Francisco Chronicle reported at the time was the heaviest load ever lifted. In 1959, it was used for Operation Skycatch, where dummy Polaris missiles were fired and caught via a string of arresting cables, before being lowered to the ground for testing. Previous versions of the test had the missiles flung out into the bay and retrieved from the ocean floor. A large trapezoidal frame was erected atop the gantry crane for the UGM-73 Poseidon missile test facility; the structural members were lifted by Marine Boss in 1967. The addition of the frame brought the total height of the crane to nearly . The crane dominates th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hunters Point Naval Shipyard 33
Hunting is the Human activity, human practice of seeking, pursuing, capturing, and killing wildlife or feral animals. The most common reasons for humans to hunt are to obtain the animal's body for meat and useful animal products (fur/hide (skin), hide, bone/tusks, horn (anatomy), horn/antler, etc.), for recreation/taxidermy (see trophy hunting), although it may also be done for resourceful reasons such as removing predators dangerous to humans or domestic animals (e.g. wolf hunting), to pest control, eliminate pest (organism), pests and nuisance animals that damage crops/livestock/poultry or zoonosis, spread diseases (see varmint hunting, varminting), for trade/tourism (see safari), or for conservation biology, ecological conservation against overpopulation and invasive species (commonly called a culling#Wildlife, cull). Recreationally hunted species are generally referred to as the ''game (food), game'', and are usually mammals and birds. A person participating in a hunt is a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hunters Point Navy Yard Crane In 1947
Hunting is the human practice of seeking, pursuing, capturing, and killing wildlife or feral animals. The most common reasons for humans to hunt are to obtain the animal's body for meat and useful animal products (fur/ hide, bone/tusks, horn/antler, etc.), for recreation/taxidermy (see trophy hunting), although it may also be done for resourceful reasons such as removing predators dangerous to humans or domestic animals (e.g. wolf hunting), to eliminate pests and nuisance animals that damage crops/livestock/poultry or spread diseases (see varminting), for trade/tourism (see safari), or for ecological conservation against overpopulation and invasive species (commonly called a cull). Recreationally hunted species are generally referred to as the ''game'', and are usually mammals and birds. A person participating in a hunt is a hunter or (less commonly) huntsman; a natural area used for hunting is called a game reserve; and an experienced hunter who helps organise a hunt and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gantry Crane
A gantry crane is a Crane (machine), crane built atop a wikt:gantry, gantry, which is a structure used to straddle an object or workspace. They can range from enormous "full" gantry cranes, capable of lifting some of the heaviest loads in the world, to small shop cranes, used for tasks such as lifting automobile engines out of vehicles. They are also called portal cranes, the "portal" being the empty space straddled by the gantry. The terms gantry crane and overhead crane (or bridge crane) are often used interchangeably, as both types of crane straddle their workload. The distinction most often drawn between the two is that with gantry cranes, the entire structure (including gantry) is usually wheeled (often on Rail profile, rails). By contrast, the supporting structure of an overhead crane is fixed in location, often in the form of the walls or ceiling of a building, to which is attached a movable hoist (device), hoist running overhead along a rail or beam (which may itself move) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hunters Point Naval Shipyard
The Hunters Point Naval Shipyard was a United States Navy shipyard in San Francisco, California, located on of waterfront at Hunters Point in the southeast corner of the city. Originally, Hunters Point was a commercial shipyard established in 1870, consisting of two graving docks. It was purchased and built up in the late 19th and early 20th century by the Union Iron Works company, later owned by the Bethlehem Shipbuilding Company and named Hunters Point Drydocks, located at Potrero Point. Known as "The World's Greatest Shipping Yard", President Theodore Roosevelt trusted his Great White Fleet of battleships to be serviced at Hunters Point in 1907 according to historical records. The shipyard was purchased by the Navy in 1940, a year before the attack on Pearl Harbor. It began operations the next year as the San Francisco Naval Shipyard, and operated until 1974 when it was deactivated and renamed Hunters Point Naval Shipyard. Used commercially for a time, in 1986 it was take ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bayview–Hunters Point, San Francisco
Bayview–Hunters Point (sometimes spelled Bay View or Bayview) is the San Francisco, California, neighborhood combining the Bayview and Hunters Point neighborhoods in the southeastern corner of the city. The decommissioned Hunters Point Naval Shipyard is located within its boundaries and Candlestick Park, which was demolished in 2015, was on the southern edge. Due to the southeastern location, the two neighborhoods are often merged. Bayview–Hunters Point has been labeled as San Francisco's "Most Isolated Neighborhood". Redevelopment projects for the neighborhood became the dominant issue of the 1990s, 2000s and 2010s. Efforts include the Bayview Redevelopment Plan for Area B, which includes approximately 1300 acres of existing residential, commercial and industrial lands. This plan identifies seven economic activity nodes within the area. The former Navy Shipyard waterfront property is also the target of redevelopment to include residential, commercial, and recreational areas. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Bridge Company
The American Bridge Company is a heavy/civil construction firm that specializes in building and renovating bridges and other large, complex structures. Founded in 1900, the company is headquartered in Coraopolis, Pennsylvania, a suburb of Pittsburgh. The firm has built many bridges in the U.S. and elsewhere; the Historic American Engineering Record notes at least 81. American Bridge has also built or helped build the Willis Tower, the Empire State Building, the Chrysler Building, launch pads, resorts, and more. During World War II, it produced tank landing ships (LSTs) for the United States Navy. In 2020, American Bridge Company was acquired by Southland Holdings LLC. History American Bridge Company was founded in April 1900, when J.P. Morgan & Co. led a consolidation of 28 of the largest U.S. steel fabricators and constructors. The company's roots extend to the late 1860s, when one of the consolidated firms, Keystone Bridge Company, built the Eads Bridge at St. Louis, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Francisco Chronicle
The ''San Francisco Chronicle'' is a newspaper serving primarily the San Francisco Bay Area of Northern California. It was founded in 1865 as ''The Daily Dramatic Chronicle'' by teenage brothers Charles de Young and M. H. de Young, Michael H. de Young. The paper is owned by the Hearst Corporation, which bought it from the de Young family in 2000. It is the only major daily paper covering the city and county of San Francisco. The paper benefited from the growth of San Francisco and had the largest newspaper circulation on the West Coast of the United States by 1880. Like other newspapers, it experienced a rapid fall in circulation in the early 21st century and was ranked 18th nationally by circulation in the first quarter of 2021. In 1994, the newspaper launched the ''SFGate'' website, with a soft launch in March and an official launch on November 3, 1994, including both content from the newspaper and other sources. "The Gate", as it was known at launch, was the first large ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UGM-27 Polaris
The UGM-27 Polaris missile was a two-stage solid-fueled nuclear-armed submarine-launched ballistic missile (SLBM). As the United States Navy's first SLBM, it served from 1961 to 1980. In the mid-1950s the Navy was involved in the Jupiter missile project with the U.S. Army, and had influenced the design by making it squat so it would fit in submarines. However, they had concerns about the use of liquid fuel rockets on board ships, and some consideration was given to a solid fuel version, Jupiter S. In 1956, during an anti-submarine study known as Project Nobska, Edward Teller suggested that very small hydrogen bomb warheads were possible. A crash program to develop a missile suitable for carrying such warheads began as Polaris, launching its first shot less than four years later, in February 1960. As the Polaris missile was fired underwater from a moving platform, it was essentially invulnerable to counterattack. This led the Navy to suggest, starting around 1959, that they ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UGM-73 Poseidon
The UGM-73 Poseidon missile was the second US Navy nuclear-armed submarine-launched ballistic missile (SLBM) system, powered by a two-stage solid-fuel rocket. It succeeded the UGM-27 Polaris beginning in 1972, bringing major advances in warheads and accuracy. It was followed by Trident I in 1979, and Trident II in 1990. Development A development study for a longer range version of the Polaris missile—achieved by enlarging it to the maximum possible size allowed by existing launch tubes—started in 1963. Tests had already shown that Polaris missiles could be operated without problems in launch tubes that had their fiberglass liners and locating rings removed. The project was given the title Polaris B3 in November, but the missile was eventually named Poseidon C3 to emphasize the technical advances over its predecessor. The C3 was the only version of the missile produced, and it was also given the designation UGM-73A. Slightly longer and considerably wider and heavier than Po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Boss
''Weeks 533'' is a capacity Clyde Iron Works model 52 barge-mounted crane which is the largest revolving floating crane on the East Coast of the United States. It was originally ordered for bridge construction and has since been used in several notable heavy lifts. History The floating barge-crane, originally named ''Marine Boss'', was built for Murphy Pacific Marine. The barge was assembled by Zidell Explorations from scrapped ship steel in Oregon in 1966 and fitted in San Francisco with a heavy 500-ton revolving crane made by Clyde Iron Works to perform the heavy girder and deck-section lifts for construction of the 1967 San Mateo-Hayward Bridge. At the time it was the largest barge crane in the western United States. In the 1970s, ''Marine Boss'' was sold to J. Ray McDermott & Co., who had introduced the first 500-ton floating cranes for offshore platform construction in 1965 and were operating a similar fleet of barge-cranes under the McDermott Derrick Barge (DB) class. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superfund Site
Superfund sites are Pollution, polluted locations in the United States requiring a long-term response to clean up hazardous material contaminations. Sites include landfills, mines, manufacturing facilities, processing plants where toxic waste has either been improperly managed or dumped. They were designated under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) of 1980. CERCLA authorized the United States Environmental Protection Agency (EPA) to create a list of such locations, which are placed on the National Priorities List (NPL). The NPL guides the EPA in "determining which sites warrant further investigation" for environmental remediation. , there were 1,340 Superfund sites in the National Priorities List in the United States. Thirty-nine additional sites have been proposed for entry on the list, and 457 sites have been cleaned up and removed from the list. New Jersey, California, and Pennsylvania have the most sites. Lists of Superfund si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
