Projects

TWI-2
TWI-1
Toledo Waterway Initiative

TWI Phase II Downtown Storage Basin

The Toledo Waterways Initiative (TWI) Program encompasses more than 45 separate projects over the course of 18 years, at a projected cost of $527 million

As part of Phase II, Turn-Key Tunneling constructed a 725-ft rib and board tunnel utilizing a hydraulically driven tunnel shield. The 12-ft diameter tunnel served as the initial pass for the two-pass tunnel system and acts as the final host for the 110-in sanitary sewer.

Turn-Key Tunneling constructed a 32-ft diameter vertical shaft for a junction chamber which served as the reception shaft for the shield removal. The tunnel was installed in lean clay with several large boulders located throughout the heading.

Completed:

November, 2019

Contractor:

Kokosing Industrial, Inc.
6235 Westerville Road, Suite 200
Westerville, OH 43081
Kris Trouteaud

Project Manager:

Brian Froehlich, PE President

Location:

City of Toledo
One Government Center
640 Jackson Street
Toledo, OH 43604