Three Rivers Protection and Overflow Reduction Tunnel (3RPORT) Program

American Structurepoint was selected to provide complete design services of consolidation sewers associated with drop shafts DS-08 through DS-13 having approximately 3,000 linear feet of sewer and process design of eight diversion structures.

American Structurepoint also completed the Preliminary Site Assessment (PEA) for all the sites of the tunnel and consolidation sewer work including working/exit shafts, drop shafts, and open cut or microtunnel shafts for the relief work. The PEA identified areas where Phase I Environmental Site Assessments should be completed. Phase I ESAs for identified sites were completed in 2016. The necessity for Phase II ESAs are yet to be determined.

In addition to the ESAs, American Structurepoint conducted an evaluation of areas to be disturbed for the potential of sensitive area permits. The evaluations includes wetlands, endangered species, Indiana Department of Environmental Management jurisdiction, US Army Corps of Engineers jurisdictional waters of the US, and Indiana Department of Natural Resources jurisdiction.