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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 (61 m) beneath the lake, varying in shape from circular to oval, and ranging in diameter from 10 to 20 ...
The name crib is derived from the function of the structure—to surround and protect the intake shaft. Cities supplied with drinking water collected by water cribs include Chicago, where two of the nine originally built cribs are in active use. [1] Water cribs were also used as residences for caretakers who would live in the structure year round.
Diagram depicting construction of the lake tunnel to connect the Two-Mile Crib (in the upper right of the diagram) to onshore water works. Gravity forces water into the tunnel through a structure called a crib. The crib for the Lake Tunnel was forty feet high and had five sides. Each side was fifty-eight feet long.
The North Manitou Shoal Light, also known as the North Manitou Light or, locally, The Crib, is a lighthouse located in Lake Michigan, southeast of North Manitou Island in Leland Township, Michigan. When it was automated in 1980, it was the last manned offshore light in the Great Lakes. [3]
The project, years in the making, must be complete by September 2023.
Officials in a Milwaukee suburb have pushed plans to withdraw water from Lake Michigan back to early October, saying they need more time to clean out reservoirs and address problems with their pumps.
The plant was under construction for many years, slowed by the Great Depression. Its construction was approved in 1930 and the plant began operation in 1947. [2] Water is drawn from a crib in Lake Michigan that has an intake about 20–30 feet below the surface of the lake and is then drawn through a tunnel below the lake bed to the treatment plant, and then put through several steps to filter ...
Both its construction and its continued maintenance were rendered extremely hazardous by the severe weather conditions of the area. Waugoshance is at the northern end of the long fetch of "south-wester" waves on Lake Michigan; the wave action is amplified as they build upon the shoal. [12] The imposing crib structure was a first on the Great Lakes.