Flood Control Projects
A Tunnel and Reservoir Plan (the Chicago Deep Tunnel) to reduce the harmful effects of floods and the flushing raw sewage into Lake Michigan is semi-operational. It diverts storm water and sewage into temporary holding reservoirs. The megaproject is one of the largest civil engineering projects ever undertaken in terms of scope, cost and timeframe. Commissioned in the mid-1970s, the project is managed by the Metropolitan Water Reclamation District of Greater Chicago. Completion of the system is not anticipated until 2019, but substantial portions of the system have already opened.
A modern flood control study report stated that flooding on the Des Plaines River has caused significant damage and economic impacts. The greatest recorded flood, in September 1986 caused an estimated $35 million in damage to 10,000 dwellings and 263 business and industrial sites. A Phase I flood control Project was authorized under the Water Resources Development Act of 1999. Project features include levee, dam, and reservoir expansion at a total cost of $50.5 million (in 2002). On August 24, 2007, the river flooded by over 9 feet. On September 14, 2008, the river flooded after receiving over 10 inches (250 mm) of rain fall over two days.
Read more about this topic: Des Plaines River
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