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Transbay Tube
The Transbay Tube is an underwater rail tunnel that carries Bay Area Rapid Transit's four transbay lines under San Francisco Bay between the cities of San Francisco and Oakland, California, Oakland in California. The tube is long, and attaches to twin bored tunnels. The section of rail between the nearest stations (one of which is underground) totals in length. The tube has a maximum depth of below sea level. Built using the immersed tube technique, the Transbay tube was constructed on land in 57 sections, transported to the site, and then submerged and fastened to the bottom – primarily by packing its sides with sand and gravel. Opened in 1974, the tunnel was the final segment of the original BART system to open. All BART lines except the Orange Line (BART), Orange Line operate through the Transbay Tube, making it one of the busiest sections of the system in terms of passenger and train traffic. During peak commute times, over 28,000 passengers per hour travel through ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Francisco Bay
San Francisco Bay (Chochenyo language, Chochenyo: 'ommu) is a large tidal estuary in the United States, U.S. state of California, and gives its name to the San Francisco Bay Area. It is dominated by the cities of San Francisco, California, San Francisco, San Jose, California, San Jose, and Oakland, California, Oakland. The San Francisco Bay drains water from approximately 40 percent of California. Water from the Sacramento River, Sacramento and San Joaquin River, San Joaquin rivers, and from the Sierra Nevada mountains, flow into Suisun Bay, which then travels through the Carquinez Strait to meet with the Napa River at the entrance to San Pablo Bay, which connects at its south end to San Francisco Bay. It then connects to the Pacific Ocean via the Golden Gate strait. However, this entire group of interconnected bays is often called the ''San Francisco Bay''. The bay was designated a Ramsar Convention, Ramsar Wetland of International Importance on February 2, 2013, and the Port ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emperor Norton
Joshua Abraham Norton (February 4, 1818 – January 8, 1880) was a resident of San Francisco, California, who in 1859 declared himself "Emperor of these United States" in a proclamation that he signed "Norton I., Emperor of the United States". Commonly known as Emperor Norton, he took the secondary title "Protector of Mexico" in 1866. Born in England and raised in South Africa, Norton left Cape Town in late 1845, sailing from Liverpool to Boston in early 1846 and eventually arriving in San Francisco in late 1849. After a brief period of prosperity, Norton made a business gambit in late 1852 that played out poorly, ultimately forcing him to declare bankruptcy in 1856. Norton proclaimed himself "Emperor of these United States" in September 1859, a role he played for the rest of his life. Norton had no formal political power but was treated deferentially in San Francisco and elsewhere in California, and currency issued in his name was honored in some of the establishments he fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yerba Buena Island
Yerba Buena Island ( Spanish: ''Isla Yerba Buena'') sits in San Francisco Bay within the borders of the City and County of San Francisco. The Yerba Buena Tunnel runs through its center and connects the western and eastern spans of the San Francisco–Oakland Bay Bridge, linking the city with Oakland, California. Treasure Island is connected by a causeway to Yerba Buena Island. According to the United States Census Bureau, Yerba Buena Island and Treasure Island together have a land area of with a total population of 2,500 as of the 2010 census. Yerba Buena Island has had several other names over the decades: Sea Bird Island, Wood Island, and Goat Island. The island may have been named after the pueblo of Yerba Buena, which was named for the plant of the same name that was abundant in the area. The plant's English and Spanish common name, Yerba buena, is an alternate form of the Spanish (literally meaning 'good herb'), generally used to describe local species of the mint f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alameda, California
Alameda ( ; ; Spanish for "Avenue (landscape), tree-lined path") is a city in Alameda County, California, United States, located in the East Bay (San Francisco Bay Area), East Bay region of the Bay Area. The city is built on an informal archipelago in San Francisco Bay, consisting of Alameda (island), Alameda Island, Bay Farm Island, Alameda, California, Bay Farm Island and Coast Guard Island, along with other smaller islands. As of the 2020 United States census, 2020 census, the city's population was 78,280. History Ohlone era Alameda originally occupied a peninsula connected to Oakland, California, Oakland. The area was low-lying and marshy, while higher ground was part of one of the largest coastal oak forests in the world. A local band of the Ohlone tribe inhabited the region for more than 3,000 years. They were present at the time of the arrival of the Spanish in the late 18th century. The Ohlone created numerous oyster shell mounds across the peninsula, some as large as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potrero Point
Potrero Point is an area in San Francisco, California, east of San Francisco's Potrero Hill neighborhood. Potrero Point was an early San Francisco industrial area. The Point started as small natural land feature that extends into Mission Bay of San Francisco Bay. The Point was enlarged by blasted and cuts on the nearby cliffs. The cut material was removed and used to fill two square miles into the San Francisco bay, making hundreds of acres of flat land. The first factories opened at Potrero Point in the 1860s. Early factories were powder magazine plant, the Pacific Rolling Mill Company and small shipyards. The large Union Iron Works and its shipyards were built at the site, stated in 1849 by Peter Donahue. To power the factories and neighborhood coal and gas-powered electricity works were built, later the site became Pacific Gas and Electric Company (PG&E). History Potrero Point was part of Mission Dolores starting in 1776. The Mission used the land for livestock grazing. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southern Crossing (California)
The Southern Crossing is a proposed highway structure that would span San Francisco Bay in California, somewhere south of the San Francisco–Oakland Bay Bridge and north of the San Mateo–Hayward Bridge. Several proposals have been made since 1947, varying in design and specific location, but none of them have ever been implemented because of cost, environmental and other concerns. History Origins The idea for the Southern Crossing dates back to the 1940s when several additional bridges across San Francisco Bay were studied. After the Bay Bridge crossing opened in 1936, connecting Rincon Hill in San Francisco with the Key Mole in Oakland via two high-level bridges and Yerba Buena Tunnel, a tunnel through Yerba Buena Island, vehicle traffic exceeded estimates almost immediately; by 1945, even with gasoline rationing, traffic was 191% of the estimates made during planning, and would reach an average of 69,000 vehicles per day by 1946. A second crossing was deemed necessary an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ralph Modjeski
Ralph Modjeski (born Rudolf Modrzejewski; ; January 27, 1861 – June 26, 1940) was a Polish-American civil engineer who achieved prominence as "America's greatest bridge builder." He furthered the use of suspension bridges and oversaw the design and construction of nearly forty bridges that spanned the great rivers of North America, as well as the development of new rail lines. In addition, he trained succeeding generations of American bridge designers and builders, including Joseph B. Strauss, chief engineer of San Francisco's Golden Gate Bridge (which was completed six months after Modjeski's San Francisco–Oakland Bay Bridge). Formative years and family Modjeski was born in Bochnia, in Galicia, on January 27, 1861, to Gustav Sinnmayer Modrzejewski and actress Helena Opid Modrzejewska (known outside Poland as Helena Modjeska). In 1865, his mother left Sinnmayer, and in 1868, she married Polish nobleman Karol Bożenta Chłapowski. In July 1876, they emigrated to America, wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bay Mud
Bay mud consists of thick deposits of soft, unconsolidated silty clay, which is saturated with water; these soil layers are situated at the bottom of certain estuary, estuaries, which are normally in temperate regions that have experienced cyclical glacial cycles. Example locations are Cape Cod Bay, Chongming Dongtan Reserve in Shanghai, China, Banc d'Arguinpreserve in Mauritania, The Bristol Channel in the United Kingdom, Mandø Island in the Wadden Sea in Denmark, Florida Bay, San Francisco Bay, Bay of Fundy, Casco Bay, Penobscot Bay, and Morro Bay. Bay mud manifests low shear strength (soil), shear strength, high compressibility and low Permeability (fluid), permeability, making it hazardous to build upon in seismically active regions like the San Francisco Bay Area. Typical bulk density of bay mud is approximately 1.3 grams per cubic centimetre. Bay muds often have a high organic matter, organic content, consisting of decayed organisms at lower depths, but may al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hudson River
The Hudson River, historically the North River, is a river that flows from north to south largely through eastern New York (state), New York state. It originates in the Adirondack Mountains at Henderson Lake (New York), Henderson Lake in the town of Newcomb, New York, Newcomb, and flows south to the New York Bay , New York Bay, a tidal estuary between New York City, New York and Jersey City, Jersey City, before draining into the Atlantic Ocean , Atlantic Ocean. The river marks boundaries between several County (New York), New York counties and the eastern border between the U.S. states of New York and New Jersey , New Jersey. The lower half of the river is a tidal estuary, deeper than the body of water into which it flows, occupying the Hudson Fjord, an inlet that formed during the most recent period of North American Quaternary glaciation, glaciation, estimated at 26,000 to 13,300 years ago. Even as far north as the city of Troy, New York, Troy, the flow of the river chan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holland Tunnel
The Holland Tunnel is a vehicular tunnel under the Hudson River that connects Hudson Square and Lower Manhattan in New York City in the east to Jersey City, New Jersey, in the west. The tunnel is operated by the Port Authority of New York and New Jersey and carries Interstate 78. The New Jersey side of the tunnel is the eastern terminus of New Jersey Route 139. The Holland Tunnel is one of three vehicular crossings between Manhattan and New Jersey; the two others are the Lincoln Tunnel and George Washington Bridge. Plans for a fixed vehicular crossing over the Hudson River were first devised in 1906. However, disagreements prolonged the planning process until 1919, when it was decided to build a tunnel under the river. Construction of the Holland Tunnel started in 1920, and it opened in 1927. At the time of its opening, it was the longest continuous underwater tunnel for vehicular traffic in the world. The Holland Tunnel was the world's first mechanically ventilated tu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oakland Long Wharf
The Oakland Long Wharf was an 11,000-foot railroad wharf and ferry pier along the east shore of San Francisco Bay located at the foot of Seventh Street in West Oakland, Oakland, California, West Oakland. The Oakland Long Wharf was built, beginning 1868, by the Central Pacific Railroad on what was previously Oakland Point, Oakland, California, Oakland Point. Beginning November 8, 1869, it served as the west coast terminus of the First transcontinental railroad. In the 1880s, Southern Pacific Railroad took over the CPRR, extending it and creating a new ferry terminal building with the official station name Oakland Pier. The entire structure became commonly and popularly called the Oakland Mole (architecture), Mole. Portions of the Wharf lasted until the 1960s. The site is now part of the facilities of the Port of Oakland, while passenger train service operates at the nearby Oakland – Jack London Square station, Jack London Square/Dellums Station and another nearby station ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oakland Mole
The Oakland Long Wharf was an 11,000-foot railroad wharf and ferry pier along the east shore of San Francisco Bay located at the foot of Seventh Street in West Oakland. The Oakland Long Wharf was built, beginning 1868, by the Central Pacific Railroad on what was previously Oakland Point. Beginning November 8, 1869, it served as the west coast terminus of the First transcontinental railroad. In the 1880s, Southern Pacific Railroad took over the CPRR, extending it and creating a new ferry terminal building with the official station name Oakland Pier. The entire structure became commonly and popularly called the Oakland Mole. Portions of the Wharf lasted until the 1960s. The site is now part of the facilities of the Port of Oakland, while passenger train service operates at the nearby Jack London Square/Dellums Station and another nearby station in Emeryville. History The first use of the site for boats was in 1852, when Gibbons' Wharf was constructed at Gibbons' Point, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
