The contract is the initial phase of the city's combined sewer overflow (CSO) long-term control plan, which is one of the largest sewer system investments made by utility company Citizens Energy Group. In late August, Indianapolis sold the wastewater utility assets to Citizens Energy Group.
"Aecom is always eager to be involved with initiatives that create, enhance and sustain our built, natural and social environments," said Aecom president and chief executive officer John M. Dionisio. "This project will help solve some key environmental challenges for Indianapolis."
Once complete, the DRTC will provide a portion of the CSO storage, collect major sewer overflows and provide future connections to other tunnels. The main tunnel consists of approximately (12.7km) of a 5.5m tunnel at a depth of 70m.
The project is slated for completion during 2017.