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Strategic Corrosion Protection of a 30 Million Gallon Combined Sewerage Overflow Tunnel

Strategic Corrosion Protection of a 30 Million Gallon Combined Sewerage Overflow Tunnel
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This paper will discuss; the pros and cons of the alternative corrosion protection methods which were considered; the rationale for the system(s) selected; and the challenges overcome during the ten-month installation period.

Product Number: 41211-629-SG
Author: Bob Maley, Steve Kelso
Publication Date: 2011
Industry: Coatings
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$20.00
$20.00

A large Midwestern city, having previously experienced various forms of corrosion within their collection and treatment system, prudently elected to embrace the concept of comprehensive corrosion protection for two newly constructed segmented tunnels. The corrosion protection requirements specified in the tunnel contract documents was a “co-lining system”. The cost to install the corrosion protection in both tunnels, including essential support staff and equipment, exceeded 40 Million Dollars. Installation of the “co-lining system” commenced on the larger 14’ diameter tunnel in early Spring 2007 and continued until late Fall 2007 at which time the owner evaluated the installation and progress, and eventually elected to abandon the “co-lining system” and explore alternative corrosion protection methods. This paper will discuss; the pros and cons of the alternative corrosion protection methods which were considered; the rationale for the system(s) selected; and the challenges overcome during the ten-month installation period.

A large Midwestern city, having previously experienced various forms of corrosion within their collection and treatment system, prudently elected to embrace the concept of comprehensive corrosion protection for two newly constructed segmented tunnels. The corrosion protection requirements specified in the tunnel contract documents was a “co-lining system”. The cost to install the corrosion protection in both tunnels, including essential support staff and equipment, exceeded 40 Million Dollars. Installation of the “co-lining system” commenced on the larger 14’ diameter tunnel in early Spring 2007 and continued until late Fall 2007 at which time the owner evaluated the installation and progress, and eventually elected to abandon the “co-lining system” and explore alternative corrosion protection methods. This paper will discuss; the pros and cons of the alternative corrosion protection methods which were considered; the rationale for the system(s) selected; and the challenges overcome during the ten-month installation period.

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