Fall Creek/White River Tunnel System

The Fall Creek/White River Tunnel System is two tunnels that will be a continuation of the current Indianapolis LTCP CSO storage tunnel program. This project includes design of the tunnels, adits, drop shafts, screen and gate structures, consolidation sewers, and diversion structures. The project will collect overflows from 35 CSO outfalls and discharge to the tunnel through 20 drop shafts. The consolidation sewers range in size from 24-to 108-inch diameter along both tunnel sections. The design requires significant evaluation of hydraulics, soils, groundwater, environmental resources, and transportation. American Structurepoint is responsible for designing consolidation sewers for the project, conducting environmental site assessments, and evaluating transportation impacts. We are also responsible for evaluating and designing green infrastructure for areas where construction will impact the surface. We are working closely with the overall tunnel designer to assist in other design components, including groundwater management.