World's Largest Tunnel Gates and Reservoir Connection Go Online as Part of Chicago's Tunnel and Reservoir Plan (TARP)

摘要

Chicago's Tunnel and Reservoir Plan (TARP) is a nearly $4.0 billion and over 30-year long program and arguably the largest and longest combined sewer tunnel and reservoir system in the world. The McCook Main Tunnel construction and gates installation is now complete for connection of the McCook Reservoir to the existing TARP Mainstream tunnel system. This paper describes the overall project and the final stages of commissioning including installation and operation of world's largest underground roller (or wheel) gates for flow control within the bifurcated tunnel sections that operate under 92 meters (300 feet) of water pressure.