station, three underground stations and four at-grade stations; six bridges; three cut and cover sections (UG4, UG1 and UG3); three new park/ride lots; and a new maintenance facility. Two 10,000-foot-long tunnels


are being excavated utilizing a massive 21.5-foot-diameter tunnel boring machine (TBM), which was formally named “Harriet” by the local community to pay tribute to civil rights activist and pre-civil war abolitionist, Harriet Tubman. Te $10 million German-imported Earth Pressure Balance Machine was assembled onsite this spring. Mining work officially began on April 27 and is anticipated to take approximately 15 months to complete. As of April 2016, the project was


approximately halfway complete and had already hit several significant milestones along the path to its projected on-time completion in 2018.


At A Glance: Crenshaw/LAX Transit Project


 Total Estimated Cost: $2.1 Billion


 Design Build Team: Walsh/ Shea Corridor Constructors (comprising Walsh, Shea, HNTB, Comstock and ARUP)


 Overview: An 8.5-mile light rail extension with multiple stations


 Forecast opening: 2018


 Diverse project components: aerial, underground and at grade stations; six bridges; cut and cover sections, and more


 TBM Facts: 21.5-ft-diameter tunnel boring machine excavating two 10,000-ft. long tunnels


www.AGC-CA.org


Major project milestones in the first half of the project have included


the following:  Te so called “Century Crunch,” which took place in July of 2014, was a weekend-long closure of Century Boulevard at the entrance to LAX to enable crews to demolish a major bridge and work on other components for one of the stops along the new light rail line project.


 Several continuous road closures throughout the project have been essential in speeding construction progress. Te longest single shut-down to date: a 37-day closure of busy Crenshaw Boulevard at Vernon last fall.


 Local Crenshaw-area residents participated in both the afore- mentioned TBM “naming” competition as well as a TBM lowering event in which the


Associated General Contractors of California 11


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