Purple Line Extension, Section 3 Tunnels

Project Details

TUTOR PERINI AFFILIATES

Frontier-Kemper / Tutor Perini
Design-Build Contractor
Contract Amount: $410 Million

Becho, Inc.
Support of excavation subcontractor
Contract Amount: $9.2 Million

Desert Mechanical Inc.
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 is 13,680 linear feet with 14 cross-passages. The tunnels will be excavated utilizing a Herrenknecht Earth Pressure Balance Tunnel Boring Machine with precast concrete segments as the final lining. Tutor Perini is also the Design-Build contractor for the Purple Line Extension Section 3 Stations project that will add two additional stations at Wilshire/Westwood and on the U.S. Department of Veterans Affairs property.

Photo Credits: LACMTA

Back