The Metropolitan Transportation Authority is planning to build an exploratory shaft near the Los Angeles County Museum of Art on Wilshire Boulevard to evaluate the ground conditions where the is being routed.
According to Curbed L.A.:
The 40 by 20 by 75 foot shaft will be built under a parking lot on the southwest corner of Wilshire and Ogden, across from LACMA. The tunnel will help engineers better understand ground pressure and gassy conditions, as well as demonstrate safe construction procedures and refine cost estimates.
Work on the shaft is slated to begin in the fall and will take 13 months to complete, Curbed L.A. reports. Metro hopes to start heavy construction for subway tunnels and stations in 2013, according to the agency's website. The entire project could be completed by 2022 if .
The Westside Subway Extension is a $5.6 billion, 9-mile extension of the Purple Line subway from its current endpoint at Wilshire Boulevard and Western Avenue. The line will include seven new subway stations, traveling through Beverly Hills and Century City with a terminus at the Veterans Medical Center in West L.A. Most of the extension will be built along Wilshire Boulevard.
To read the Curbed L.A. article in full, click here.