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Purple Line Extension, Section 3 Tunnels

Project Details

TUTOR PERINI AFFILIATES

Frontier-Kemper / ҹɫè
Design-Build Contractor
Contract Amount: $468 Million


Support of excavation subcontractor
Contract Amount: $9.2 Million


Mechanical Subcontractor
Contract Amount: $5.8 Million

OWNER
Los Angeles County Metropolitan Transportation Authority

LOCATION
Los Angeles, CA

ARCHITECT
STV Incorporated

SIZE
2.56 Miles

COMPLETION
2023

Project Description

Design-Build project consisting of two 22-foot diameter twin bore subway tunnels. Each tunnel isÌý13,680Ìýlinear feetÌýwith 14 cross-passages.ÌýThe tunnels will be excavated utilizing a Herrenknecht Earth Pressure BalanceÌýTunnel Boring Machine with precast concrete segments as the final lining. ҹɫè is also the Design-Build contractor for the Purple Line Extension Section 3 Stations project thatÌýwill add two additional stations at Wilshire/Westwood and on the U.S. Department of Veterans Affairs property.

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RELATED PROJECTS
Purple Line Extension, Section 2
Purple Line Extension, Section 3 Stations

Photo Credits: LACMTA

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