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.
San Vicente Pipeline Tunnel Segments San Diego, CA
Furnish and install 44,000 linear ft of bolted precast tunnel segments. Segment casting is 100% complete and installation is 25% complete.
Contract: Start Date: March 2006 Completion Date: April 2007 Owner: San Diego County Water Authority Prime Contractor: Traylor/J.F.Shea, Joint Venture
TSG Precast Plant – Littlerock, CA
MTA C0800 Tunnel Segments Los Angeles, CA
This project involves the manufacture and installation of approximately 14,000 lf of precast concrete tunnel segments. The segments are the final liner for a subway tunnel, the MTA's Gold Line in East Los Angeles. The one pass liner is a first for the LACMTA. Casting began August 2005 and is 100% complete.
Subcontract: Manufacture/Install one pass liner tunnel segments for MTA subway Contract: C0800 Start Date: January 2005 Completion Date: 2006 Owner: Los Angeles County, Metropolitan Transportation Authority Joint Venture: Traylor Shea Ghazi Precast, Subcontractor to Traylor/Frontier Kemper JV
NEIS Tunnel Segments Los Angeles, CA
This project involves the manufacturing and installation of precast concrete tunnel segments for the City of Los Angeles NEIS Tunnel project. The tunnel is approximately 8,411 meters long. Segment casting and installation is 100% complete.
Contract: WO SZC 11141, Spec. 02421 Start Date: January 2003 Completion Date: November 2004 Owner: City of Los Angeles, CA Joint Venture: Traylor Shea Ghazi Precast, Subcontractor to TBI/Shea/FK/Kenny, A Joint Venture
Arrowhead Tunnel Segments San Bernardino, CA
Manufacture and install precast concrete tunnel segments for the Metropolitan Water District of Southern California's Arrowhead Tunnels Project. The tunnel is approximately 42,330 ft long. The project was awarded in early 2002. The tunnel segments for this project were designed to withstand 900 ft of hydrostatic water pressure. No tunnel in the world has ever had to meet such a high hydrostatic load. As a result, testing was performed at the University of Illinois for the segment radial joint design, in Hamburg, Germany, for the gasket design, and in Los Angeles for the gasket/gasket groove interaction design. Segment casting and installation is 75% complete.
Contract: 1542, Spec. #1437, Proj. 103079 Start Date: December 2001, Segments Feb. 2003 Completion Date: In Progress Owner: Metropolitan Water Dist. of S. CA Joint Venture: Traylor Shea Ghazi Precast, Subcontractor to Shea/Kenny, A Joint Venture
NOS-ECIS Tunnel Segments Los Angeles, CA
Manufacture and install precast concrete tunnel segments for the City of Los Angeles' NOS-ECIS Tunnel project. The tunnel is approximately 18,125 meters long. Casting was finished in March 2003, and segment installation was completed in September 2003.
Contract:W.O. E2001433, Spec #02325 Start Date:January 2001 Completion Date: September 2003 Owner: City of Los Angeles, CA Joint Venture:Traylor Shea Ghazi Precast, Subcontractor to Kenny/Shea/TBI/FK, A Joint Venture
Dulles Airport Tunnel Segments Chantilly, VA
Contract to manufacture and supply precast concrete tunnel liner segments for the MWAA Dulles Airport East APM Tunnels and Stations Project. The twin tunnels for the Automated People Mover system will be constructed by cut-and-cover, NATM, and TBM excavation. The bolted, gasketed, single pass tunnel lining will be utilized for the TBM section under the airport taxiways, approximately 4,400 FL in total length.
Supplier: TSG Precast, LLC, to supply precast tunnel liner segments to J.R. James Co., Inc. Contract: 1-04-C070, Spec. 02427 Start Date: January 2005 Completion Date: February 2006 Owner: Metropolitan Washington Airports Authority Prime Contractor: Atkinson/Clark/Shea, A Joint Venture
Projects 
