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San Pedro Bay (California)
San Pedro Bay is an inlet on the Pacific Ocean coast of southern California, United States. It is the site of the Port of Los Angeles and the Port of Long Beach, which together form the fifth-busiest port facility in the world (behind the ports of Shanghai, Singapore, Hong Kong, and Shenzhen) and the busiest in the Americas. The community of San Pedro, Los Angeles forms the western side of the bay, and shares the name.〔(Why Did a 1542 Spanish Voyage Refer to San Pedro Bay as the 'Bay of the Smoke'? by Nathan Masters, March 28, 2013 )〕〔(sanpedrobayhistoricalsociety.com )〕〔(waterandpower.org, Early Views of San Pedro and Wilmington )〕
==Seabed==
Most of the bay is between 32 and 75 feet (10 and 20 mt) deep. The seabed near Long Beach has experienced considerable subsidence as a result of oil extraction in the Wilmington Field from the 1950s onward. Ironically, this helped the Port of Long Beach surpass the Port of Los Angeles as the leading port in the United States for a time in the 1980s and 1990s, since the deeper seafloor meant that Long Beach could accommodate ships with deeper drafts than could Los Angeles. Dredging operations related to the construction of a gigantic new marine terminal at the Port of Los Angeles have since made both sides of the bay accessible to even the largest existing container ships. Concerns regarding subsidence increased until Operation "Big Squirt," a water injection program, halted any progression of sinking land in 1960.〔The Port of Long Beach, By Michael D. White, page 89〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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