Tunnel Business Magazine

DEC 2018

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TUNNELINGONLINE.COM 1 7 TBM: TUNNEL BUSINESS MAGAZINE // DECEMBER 2018 C O V E R S T O R Y "The tunnel was designed to resolve the river flooding disasters for the Chi- cago Albany Park neighborhood," Jara- milla said. Construction of the tunnel began in April 2016 and was put into operation in y 2018. Plans for the $62.8 million tunnel were unveiled shortly after a second 100-year storm struck the area in a five-year span, bringing substantial flooding and prop- erty damage in the process. The first storm hit the region in 2008, followed with a similarly powerful storm in 2013. After construction crews completed blasting a 150-ft deep shaft in River Park, the rebuilt Robbins ro - sembled underground. The main-beam machine has been owned by Kenny Construction sinc difica- tions included enlarging the cutting di- ameter from 17.2 to 20.4 ft. "Extensive modifications were also made underground to the machine to be able to install rock dowels and stand the ring steel under the roof shield," Kenny project manager Clay Spellman said. Following tunnel excavation through dolomite limestone beneath Foster Av- enue, work began on the concrete lining of tunnel and shafts, completion of hy- draulic structures and two full Chicago Park District restorations at River Park and Eugene Park. As construction manager, WSP over- saw the installation of the inlet and out- let hydraulic structures, excavation for overburden at both shafts, controlled blasting for rock excava - ing operation, tunnel and shaft concrete lining and tunnel contact grouting. The project also included a pump sta- tion with a supervisory control and data acquisition (SCADA) surveillance system. The tunnel demonstrated its value very soon after it became operational. y and June, the tunnel was oper- ated multiple times to reduce the risk of the Albany neighborhood flooding from significant weather events," Jaramilla said. "The Albany Park neighborhood did not flood." Surface restorations and park open- ings, including a new baseball field, were completed in August 2018. Continuous Communication "The entire tunnel footprint spans three aldermanic wards involving thousands of residents," Jaramilla said. "Public safety and awareness were para- mount to the WSP team and essential for the delivery of a successful project." Throughout the project, consideration was given to the construction impacts of this project to the community and stake-

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