OSIS Augmentation and Relief Sewer (OARS)

 

 

Facility Type
Waterworks
Location
Columbus, Ohio
Start Date
09/2010
End Date
08/2017

 

 

PROJECT DESCRIPTION

JV Project with Kenny Construction Company

Construct a 20' ID combined sewer tunnel 23,300' long using a slurry shield tunnel boring machine. The tunnel was excavated in Karstic limestone, with initial support using precast concrete gasketed/bolted segments.  Three main shafts, 52', 42', and 48' ID, were 170' to 210' deep, excavated using drill & blast, supported by slurry wall and lined with cast-in-place concrete. Hydraulic drop structure, relief structure, overflow connection sewer, screening facility.

Photo Courtesy of DLZ Surveyor, Russell Koenig and Construction Management Team

 

 

 

 

OTHER PROJECT (By OBAYASHI CORP. - North American Civil -)