tunnelling-journal (1)
tunnelling-journal (1)
  • Home
  • Print
    • Subscribe
    • Tunnelling Journal
    • Breakthrough
    • ITA Activity Report
    • A&NZ Journal
    • WTC Preview
    • Media Kit
  • Digital
    • Newsletter
    • E-Shots
    • Products Page
    • Media Kit
  • Conferences
    • BTS Conference and Exhibition
    • Cutting Edge 2021
  • Buyer’s Guide
  • Events Diary
  • Jobs
  • About Us
  • Contact Us
  • Podcast

Home > JCM JV re-dedicates TBM for mid-June start on Seattle’s Northlink LRT

JCM JV re-dedicates TBM for mid-June start on Seattle’s Northlink LRT

Amanda Foley

Written by Amanda Foley on 01/05/2014 in News

Tagged: underground

A 21ft (6.4m) diameter Hitachi Zosen EPB machine, a bottle of Washington cider and a crowd of elected officials, Sound Transit staff and supporters marked the ceremonial start of tunneling activities on Seattle’s Northgate Link LRT Extension, at the project’s Maple Leaf Portal site on Monday, April 28.

‘Brenda’ will be the first of two TBMs to begin the 3.6-mile (5.8km) journey from NE 92nd Street, along I-5 south, to the University of Washington Station, when crews start tunneling operations in early June. The machine will pause at the Roosevelt and U District stations, before reaching the University of Washington Station next to the Montlake Cut – a two-year journey through the region’s glacial soils. A second machine will follow on the northbound tube later this year.

In 2012, the now-refurbished Hitachi Zosen machine successfully completed two one-mile tunnels for the U230 contract of the University Link light rail project, between downtown Seattle and Capitol Hill (see feature article in NATJ Oct/Nov 2012 digital edition). That project is currently scheduled to open in the first quarter of 2016, six to nine months early, and more than $100 million under budget.

The 4.3-mile (6.9km) long $2.1 billion Northgate Link Extension will run mostly underground through one of the most congested travel corridors in the region and includes underground stations serving the U District and Roosevelt and an elevated station at Northgate.

A joint venture of Jay Dee Contractors, Frank Coluccio Construction Company, and Michels Corporation, (JCM Northlink) won the contract for the Northgate Link tunnel and station work with a bid of $440,321,000, coming in some 25% below the engineer’s estimate.

Elsewhere on the project, jet grouting operations at the south end of the Roosevelt Station site are now complete and works have moved to the north end of the station in readiness for when the TBMs arrive from the Maple Leaf Portal launch site. Last week (end of April), crews also began shaft construction for the U-District Station box.

Train service on the Northgate Link extension is scheduled for September 2021.

News archive: Sound Transit picks North Star as top ranked firm for North Link CM

Comments:

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Search

Digital Edition

More Like This

16/09/2020

ATS2020 Conference postponement

ATS2020 Conference postponement

Although having been committed to try and deliver the Australasian Tunnelling Conference ATS2020 on the scheduled dates of 29th November…

10/09/2020

A Greener Route for SCL?

A Greener Route for SCL?

Using sprayed concrete with a bonded waterproofing membrane could bring huge environmental benefits in hard rock tunnels. So why is no one doing it? Kristina Smith reports.

06/10/2020

Balfour Beatty breaks through on Hinkley Point C SCL tunnel

Balfour Beatty breaks through on Hinkley Point C SCL tunnel

Balfour Beatty, alongside client EDF, has celebrated a major milestone on its Hinkley Point C tunnelling and marine project, as…

  • Contact Us
  • Media Kit
  • Magazine Archive

Newsletter

The latest from the Tunneling Journal direct to your inbox.

Social



Enquiries

TGS Media Ltd
The Old Library
Webster House
Dudley Road
Tunbridge Wells
TN1 1LE
United Kingdom

© Tunnelling Journal. All Rights Reserved. Privacy Policy / Terms & Conditions. Admin

We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.OkRead more