City of Columbus – BWARI
– Rickenbacker Sanitary Interceptor

 

 

BWARI Tunnel Project

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H.R. Gray teamed up with URS to construct the Big Walnut Augmentation/ Rickenbacker Sanitary Interceptor. H.R. Gray’s responsibilities consist of construction management, inspection, scheduling, and constructability services. The project team is responsible for the design and construction management of two soft ground tunnels, 17,200 and 13,000 feet in length, having finish diameters of 14' and 12' respectively. There will also be 4,200 LF of 14' diameter open-cut construction.




Part 1 begins at the City’s Southerly Wastewater Treatment Plant and ends at Alum Creek Drive and State Route 317. Part 2 generally lies beneath the alignment of Alum Creek Drive.

The interceptor will be designed for soft ground tunnel construction. Geotechnical data indicates that subsurface geology is conductive to tunnel construction. The tunnel will be designed for excavation by tunnel boring machines (TBMs).



The TBM will enter the ground through a shaft located at the beginning of each tunnel contract and exit through a shaft at the terminus of the contract.

Groundwater is of critical importance due to the fact that many residents along the planned construction corridor rely on individual wells for their source of water supply. Based on specialized hydro geological studies, wells which may be impacted by the construction will be identified. Prior to the initiation of construction, owners of wells which may be impacted will have new wells and associated equipment installed by the City. During construction, monitoring wells will be installed to determine any unanticipated impacts to the regional groundwater.

Owner:

   City of Columbus

Location:

   Columbus, Ohio

Relevent Features:

  

Sewer Construction

Construction Management

Inspection

Scheduling

Constructability Review

Client Reference:

  

Tanya Arsh, P.E.

Administrator

614.645.8156

Cost:

   $100,000,000 - $150,000,000

Project Completion:

   2007


Please contact H.R. Gray for additional information pertaining to any of our services.