A 3 YEAR, 4.5 MILE JOURNEY 180 FEET BELOW DOWNTOWN COLUMBUS
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Nearly three years ago, this 540-foot long Tunnel Boring Machine (TBM) began its journey north from south of Frank Road near the Scioto River to I-670 on the north side of downtown Columbus, averaging about 70 feet a day. On September 4th, the giant TBM broke out into the final shaft at the upstream end of the tunnel, completing a 4.5-mile long adventure. The tunnel, the most expensive public works project ever for the City of Columbus, is 20 feet in diameter and approximately 180 feet underground.

Once the entire project is complete, the tunnel will carry wastewater to the treatment plants on the South side of Columbus, where the water will be pumped out and treated. More importantly, the tunnel will hold combined stormwater and sewage to prevent it from overflowing into the Scioto River during heavy rain. 
WATCH VIDEO

WHAT OUR ELECTED OFFICIALS ARE SAYING


"This project means better quality water and a better quality city," stated Columbus Mayor Michael Coleman."



"This is a big win for our environment and our river," stated City Councilmember Zach Klein . "It's amazing to think about the size and scope of this project."


Celebrating a job well done.

Once operational, nearly two billion gallons of combined sewage overflows will be treated instead of discharged to the Scioto River each year.

PROJECT PARTNERS
City of Columbus, Ohio

DESIGN TEAM
DLZ
CH2M
Jenny Engineering
Prime AE
EMH&T
Dynotec
Eagon & Associates
Multivista
CDM Smith

CONSTRUCTION MANAGEMENT
Black & Veatch
HR Gray
Smoot Construction
Aldea Services

CONTRACTORS
Kenny/Obayashi
Trumbull
Igel
Capital Tunneling
Miles McClellan
VISIT OUR WEBSITE DLZ.COM