For project manager Greg Hauser, P.E., M.ASCE, 180 ft (55 km) underground in southern Cook County, Illinois, was the best place in the world to be. That is how he describes his experience inside the high-performance tunnel-boring machine (TBM) as it bored through hard dolomite limestone during the construction of the Little Calumet Leg—the last segment (7.9 mi [12.7 km]) of the Calumet Tunnel system, which forms part of the Chicago Tunnel and Reservoir Project (TARP). "It's the greatest job there is," says Hauser, who is the area manager for Jay Dee Contractors, Inc., of Livonia, Michigan, one of the project contractors.
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机译：对于项目经理Greg Hauser，PE，M.ASCE，伊利诺伊州库克县南部地下180英尺（55公里）是世界上最好的地方。这就是他描述自己在高性能隧道掘进机（TBM）中的经历的过程，该掘进机在小Calumet腿的施工过程中穿过硬白云岩石灰石，这是Calumet隧道的最后一段（7.9英里（12.7公里））该系统是芝加哥隧道和水库项目（TARP）的一部分。 “这是最伟大的工作，”项目承包商之一的密歇根州利沃尼亚的Jay Dee Contractors，Inc.地区经理Hauser说。
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