CONTINUING A LEGACY OF LARGE-DIAMETER HARD ROCK TUNNELING IN CHICAGO—THE DES PLAINES INFLOW TUNNEL

摘要

The Metropolitan Water Reclamation District of Greater Chicago’s Des Plaines InflowrnTunnel will provide direct conveyance of 317 cubic meters per second (11,200 cubicrnfeet per second) of water from the Des Plaines Tunnel System to the McCook Reservoir.rnThe project will alleviate a bottleneck in the Tunnel and Reservoir Plan (TARP) systemrnby creating a second major tunnel connection to the 38 billion liter (10 billion gallon)rnMcCook Reservoir. The 1.6 kilometer (1 mile) long, 6.1 meter (20 foot) diameter hardrnrock tunnel will include live connections to the existing Des Plaines Tunnel System andrnto the operating McCook Reservoir as well as a gate shaft and an energy dissipationrnstructure in the reservoir with low clearance crossings of other existing TARP tunnels.rnThe project will bid for construction in mid-2015.