Army Corps of Engineers, built to provide flood relief by storing the water collected and transferred from the TARP tunnels until it can be treated at local reclamation plants. The reservoirs are a joint project of the Water Reclamation District and the U.S. Phase II, now called the Chicago Underflow Plan (CUP), consists of three main reservoirs: the Majewski Reservoir, Thornton Reservoir, and McCook Reservoir with a combined capacity of 69.05 billion liters (18.24 billion gallons). After more than 30 years and over 160 km (100 mi) of tunnels, the entire first phase of the TARP system became operational in 2005. Immediately upon completion, each tunnel system was put into service and the benefits were seen almost instantaneously. A later tunnel for the Little Calumet Leg of the Calumet system was excavated using a Robbins TBM in 2002, setting multiple records in the process including 138 m (452 ft) bored in one day. The Mainstream Tunnel System was composed of 65.2 km (40.5 mi) of tunnel, the Des Plaines System with 41.2 km (25.6 mi), the O’Hare System with 10.6 km (6.6 mi), and the Calumet System of 59.1 km (36.7 mi). Nearly all of the tunnels were excavated in the area’s dolomitic limestone, and required the use of TBMs up to 10.8 m in diameter-the largest TBMs that had ever been built at the time. Four tunnel systems comprise the first phase: Mainstream, Des Plaines, Calumet and O’Hare, which have a combined length of 176.1 km (109.4 mi) and range in diameter from 2.4 m to 10.8 m (8.0 ft to 35.4 ft). Phase I was directed towards pollution control and consisted of tunnels, drop shafts, and dewatering stations to eliminate nearly 85 percent of CSO pollution. TARP was originally divided into two phases but now refers solely to Phase I. After heavy rains, combined sewage overflows (CSOs) would seep into residential basements, nearby streams and rivers, as well as Lake Michigan – Chicago’s main source for drinking water. The TARP was created in 1975 to combat increased flooding and drainage problems that plagued Chicago and surrounding areas. Spanning 20 years and using over 30 TBMs, Chicago’s massive Tunnel and Reservoir Plan (TARP) has been possibly the largest clean water project of the twentieth century. It also has an agreement with Maryland officials to work on a transit tunnel between Baltimore and Washington, D.C.įor what it’s worth, The Boring Company has also sold millions of dollars’ worth of caps and flamethrowers, boosted by Musk’s marketing skills.Thirty TBMs participate in Chicago’s Epic Tunnel and Reservoir Plan (TARP) Project Description ![]() The Boring Company is arguably the least experienced of the three teams, but it’s making quick headway: It’s been extending a test tunnel that starts at SpaceX’s headquarters in Hawthorne, Calif., and is projected to continue beneath Los Angeles. The Chicago Infrastructure Trust and city officials will evaluate the teams’ responses, determine which of them are qualified to proceed, and then issue a request for proposals to the qualified bidders. O’Hare Express LLC, which brings together Meridiam, Antarctica Capital, JLC Infrastructure, Mott MacDonald and First Transit.O’Hare Express Train Partners, a consortium that includes OHL Infrastructure, Kiewit and Amtrak.Oaktree Capital Management, a Los Angeles-based investment firm that was once the largest shareholder in Tronc, which owns the Chicago Tribune, the Los Angeles Times and other media properties.In addition to The Boring Company, the respondents include:
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