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Water cribs in Chicago : ウィキペディア英語版 | Water cribs in Chicago
The water cribs in Chicago are structures built to house and protect offshore water intakes used to supply the City of Chicago with drinking water from Lake Michigan. Water is collected and transported through tunnels located close to 200 feet beneath the lake, varying in shape from circular to oval, and ranging in diameter from 10 to 20 feet. The tunnels lead from the cribs to one of two water purification plants located onshore, the Jardine Water Purification Plant (the world's largest) and the South Water Purification Plant, where the water is then treated before being pumped to all parts of the city as well as 118 suburbs. The city is served by six existing cribs, Four Mile Crib (1891), 68th Street Crib (1892), Carter H. Harrison Crib (1900), Edward F. Dunne Crib (1909), Wilson Avenue Crib (1918) (located at ), and William E. Dever Crib (1935).〔(【引用サイトリンク】url=http://www.lighthousefriends.com/light.asp?ID=867 )〕 ==Two Mile Crib==
The Two-Mile Crib was constructed as part of a scheme by Ellis S. Chesbrough in 1865, to help with the purification of the water because of damage caused by the city dumping sewage into the lake. Construction of the crib began in May 1864, miners and workers worked 24 hours a day and six days a week. The total completion of the project was in March 1867 and costing the city $380,784. Purified water was pumped to the Chicago Avenue Pumping Station which still stands to this day on North Michigan Avenue.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Water cribs in Chicago」の詳細全文を読む
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