Where under Crenshaw Boulevard is “Harriet” the tunnel boring machine?
Harriet has been moving southbound under Crenshaw Boulevard and is now south of Coliseum Street. The tunnel boring machine (TBM) is 400 feet long and 21.5 feet in diameter. The TBM crew is manned by 75 workers laboring on a 24/7 schedule. Harriet is expected to reach the north side of the Martin Luther King Jr. station box by late this summer.
Walsh/Shea Corridor Constructors (WSCC) is now installing waterproof membrane, building station facilities and the perimeter lower walls as well as grouting work.
Martin Luther King Jr. Station
Walsh/Shea Corridor Constructors (WSCC) continues to work on the station, with work on the subfloor underway. The third bracing segment and waterproofing membrane installation around the lower walls is in process.
Leimert Park Station
The excavation process of a third underground station is almost complete. The contractor is also beginning to work on the subfloor and installing the elevator infrastructure.
UG4 (Portal exit/entrance to the tunnel, between Vernon Avenue and 48th Street)
Excavation continues on the entrance and exit portal to the underground segment, where WSCC is finishing installing braces. The hanging of utilities is taking place as well as removal of the remaining Tesoro pipeline.
Park Mesa Heights (street level segment between 48th and 59th Street)
Work will be done in five stages for the northern segment of the right-of-way in Park Mesa Heights between 54th and 48th streets. New curbs, gutters and sidewalks are being built and new street lights and traffic signals will be installed. Crenshaw Boulevard will also be re-surfaced.
The replacement of a storm drain at specific locations along the western side of Crenshaw Boulevard is also taking place from 48th to 52nd streets.
UG3 (underground segment from 59th to 67th streets)
The process to install steel piles on the east side of the rail right-of-way has been completed. Metro is now working on the west side of Crenshaw Boulevard installing steel piles. Later, excavation will take place in the center of the street.
Fairview Heights, Downtown Inglewood and Westchester/Veterans stations
Construction of the Fairview Heights, Downtown Inglewood and Westchester/Veterans stations are underway with foundation and footing work for the platforms and ramps. Conduits have been installed to house communications and electronics equipment.
For the at-grade or street level segment, between Fairview Heights Station and Arbor Vitae Street, WSCC is finishing the foundation for the poles that will carry the overhead catenary system (OCS) — the power lines that provide electricity that powers the trains, as well as lighting systems. Installation of the rail line’s communication systems is also in place.
In the city of Inglewood, Metro is building a new storm drain between Centinela Avenue and La Brea Avenue. Relocation of phone equipment, water lines and sewer lines is also taking place.
La Brea Bridge
The bridge’s superstructure over La Brea Avenue is completed — this is the first of six aerial structures on the project. Construction crews are now completing work on the Mechanically Stabilized Earth (MSE) walls on either side of the bridge.
Construction continues on the rail bridge over the 405 freeway. Crews are working on the foundation and the MSE walls. The abutments and the columns on both sides of the freeway are finished. The falsework or framing to create the superstructure will begin in the coming months.
Falsework (framing) for the bridge superstructure continues.
Installation of rebar to complete the deck of the elevated structure is more than 80 percent. Construction of the MSE wall on the south side of the station is completed and work continues on the north side’s MSE.
UG1 (Underground segment)
The trench from 104th to 111th streets is 50 percent completed. If you’re flying into LAX’s south runway, look out the right side of the plane for a good view of the trench just before landing.
111th Street Bridge
The abutments on both sides of 111th Street are finished and concrete is begin place at the bridge deck. This bridge will allow motor vehicle traffic to enter the cargo area of the airport.
Green Line Connection
Work continues on the bridge superstructure with falsework and rebar installation are now underway. The pouring of concrete is expected to begin this summer.
Southwest Yard Maintenance Facility
Construction of the 115,650-square-foot facility began last month. The contractor Hensel Phelps/Herzog Joint Venture began demolishing and leveling what will become a maintenance facility for 70 light-rail vehicles that will be used on the Crenshaw/LAX Line and Green Line. The new yard will include a main shop, a washing facility, a cleaning platform, a material storage building and a wheel truing shop, plus office space where approximately 200 Metro employees will work around-the-clock.