Three Rivers Protection & Overflow Reduction Tunnel, Indiana, USA

The Three Rivers in Indiana are the major rivers flowing through the city of Fort Wayne : the St. Marys River and the Maumee River, along with their tributary, the St. Joseph River. These rivers play a crucial role in local community life, not only as sources of water and natural resources, but also as vital arteries for historic navigation and transportation.

The Three Rivers Protection & Overflow Reduction Tunnel (3RPORT) is a significant project to address the issue of combined sewage spills (CSO) during heavy rain events in Fort Wayne. The project involves the construction of a deep rock tunnel, drop shafts and consolidation sewers to collect and manage wastewater from eight critical locations along the St. Marys and Maumee Rivers. Once completed, the tunnel system will reduce up to 90% of the CSO that currently ends up in rivers during periods of heavy rainfall.

This intervention will not only improve the water quality of the Three Rivers , but will also help protect the local aquatic environment and ensure that the rivers remain vital resources for the community. The 3RPORT represents an example of how modern infrastructure can be designed to address complex environmental challenges, improving public health and Fort Wayne's overall urban environment.