Tunnel and Reservoir Plan We're all over that,

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https://en.wikipedia.org/wiki/Tunnel_and_Reservoir_Plan



The Tunnel and Reservoir Plan (abbreviated TARP and more commonly known as the Deep Tunnel Project or the Chicago Deep Tunnel) is a large civil engineering project that aims to reduce flooding in the metropolitan Chicago area, and to reduce the harmful effects of flushing raw sewage into Lake Michigan by diverting 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 2029,[1] but substantial portions of the system have already opened and are currently operational. Across 30 years of construction, over $3 billion has been spent on the project.[2]

Status[edit]

Phase 1, the creation of 109.4 miles (176 km) of drainage tunnels ranging from 9–33 feet in diameter, up to 350 feet underground, was adopted in 1972, commenced in 1975, and completed and operational by 2006. Phase 2, reservoirs primarily intended for flood control, remains underway with an expected completion date of 2029. Currently, up to 2.3 billion gallons of sewage can be stored and held in the tunnels themselves while awaiting processing at sewage treatment plants, which release treated water into the Calumet and Des Plaines Rivers.

Additional sewage is stored at the 7.9 billion gallon Thornton Composite Reservoir, and the 350 million gallon Gloria Alitto Majewski Reservoir near O'Hare International Airport.

The 10 billion gallon McCook Reservoir is scheduled for completion in 2017 (3.5 billion gallons) and 2029 (6.5 billion gallons). As the reservoirs are decommissioned quarries, construction has been delayed by decreased demand for the quarried gravel. Upon completion, the TARP system will have a capacity of 17.5 billion gallons of storage.

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