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South Cobb Tunnel Project (tbi0801)
Cobb County, Georgia
The South Cobb Tunnel is a 29,000 lf of 27'4" hard rock tunnel to be mined with a main beam TBM.
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 San Vicente to Second Aqueduct Pipeline Project (tbi0501)
San Diego, California
The San Vicente Pipeline Tunnel is an 11-mile water conveyance being built for the San Diego County Water Authority.
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 LAMTA C0800 Metro Gold Line, Eastside Extension Project (tbi0402)
Los Angeles, California
Construction of twin subway tunnels, 7500 lf long, excavated with two new 21 ft EPB tunnel machines in alluvial geology.
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Traylor-Shea Joint Venture is constructing the Upper Northwest Interceptor Sections 1 & 2 project in Sacramento, California. UNWI 1 & 2 includes 19,240 feet of 144" pipe using EPB tunneling methods. The project also includes 54 feet of 120" interceptor pipeline, 20 access manholes, 2 transition structures, and the connection of three existing trunk sewer lines.
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 Big Walnut Creek Augmentation/Rickenbacker Interceptor (tbi0306)
Franklin County, OH
The construction of 225' long cast-in-place box tunnel was completed August 2004. The TBM and all batching plants were all delivered, assembled, and commissioned in October 2004.
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 TBI Precast - Joint Venture Projects
In 2001 Traylor Bros., Inc. established the precast segment unit within the Underground Division. Our goal is to be the preferred precast concrete tunnel liner manufacturer in the United States. |
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 Brightwater Conveyance System - East Contract (tbi0602)
Seattle, Washington
When on-line in 2010, Brightwater will be the third regional wastewater treatment plant in a system serving King, Snohomish, and Pierce counties since the 1960s.
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A complete history of current and completed Underground Projects is provided. |
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Projects 
