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Metro board approves Purple line contract
28 May, 2019
USA – The Los Angeles County Metropolitan Transportation Authority (Metro) board approved a USD 1.36bn contract with Tutor Perini/O&G to build stations, track, systems and testing for Section 3 of the Purple Line Extension between Century City, the Wilshire/Westwood Station and the Westwood/VA Hospital Station.
TAC Awards 2018
20 December, 2018
From rising stars to nationally acclaimed projects, the Tunnelling Association of Canada (TAC) presents its annual awards each fall to recognize the deserving individuals and engineering accomplishments in the Canadian tunnelling sector. The 2018 awards were presented on November 8 in Edmonton.
Under the dam
26 October, 2018
Paola De Pascali spoke with Tony Dell, lead geotechnical engineer at SNC-Lavalin to discuss the excavation of the John Hart powerhouse and tunnels, including an unexpected soft ground surprise
TAC Directors’ Annual Reports
26 October, 2018
Each regional director for the TAC writes a report in October sharing the status of work and forthcoming projects in the five chapters across Canada
Frontier-Kemper still the lowest in LA County tunnel re-bid
04 October, 2018
US – Tutor Perini Corporation announced October 3 its subsidiary, Frontier-Kemper Constructors, has been identified by the Los Angeles County Department of Water and Power as the low bidder for the USD 121M River Supply Conduit Improvement Upper Reach – Unit 7 Project (RSC Unit 7). The project was bid earlier this year, with Frontier-Kemper providing the low bid. The customer subsequently opted to re-bid the project, and Frontier-Kemper was again designated as the low bidder.
Metro to award Purple Line work to Frontier-Kemper/Tutor Perini JV
22 June, 2018
Tutor Perini Corporation announced that the Frontier-Kemper/Tutor Perini Joint Venture has received a notice of intent to award a contract from the Los Angeles County Metropolitan Transportation Authority for the Purple Line Extension Section 3 Tunnels Project. The contract value is anticipated to be approximately USD 410M.
Rio Tinto issues NTP on second Kemano tunnel
02 January, 2018
Canada – A Frontier-Kemper Constructors and Aecon Group JV announced December 19 it has received notice to proceed from Rio Tinto for a contract valued at approximately CAD 337M (USD 274M) to complete the construction of the remaining 7.6km section of a 16km second tunnel at the Kemano Generating Station in British Columbia.
Fibreglass Jacking Pipe Upgrades Las Vegas Sewers
18 April, 2017
The Paradise Whitney Interceptor project is a 13-mile (21km) gravity sewer to increase capacity in the Las Vegas area. Built through sticky clay and collapsible soils, crews faced challenging work around existing underground utilities. This article looks at the fibreglass reinforced polymer mortar pipe chosen for the new installation
TAC Awards 2016
10 January, 2017
The Tunnelling Association of Canada (TAC) presents its annual awards each fall to recognise the deserving individuals and projects in the Canadian tunnelling sectors. The 2016 awards were presented on October 17 in OTtawa. Congratulations to all of this year’s winners
Up to speed
03 November, 2016
TAC's regional directors provide their annual reports with project updates and other chapter information.
Washington state supreme court won't hear Brightwater lawsuit
14 September, 2016
The Washington State Supreme Court has declined to review a lower court ruling that affirmed King County is entitled to more than USD 129M in damages from a tunnelling contractor that defaulted on key contractual obligations as part of the Brightwater tunnel construction, the county announced September 12.
30 January, 2015
The Tunnelling Association of Canada’s regional directors give their annual reports on the industry.
18 December, 2014
Updating the John Hart Generating Station requires a new underground powerhouse. Jesse Schneider of Frontier-Kemper Constructors, ULC, and Tony Dell of SNC Lavalin Power, discuss the proposed design and construction approach for the project.
06 November, 2014
In partnership with the Tunnelling Association of Canada (TAC), every October Tunnels & Tunnelling North America publishes the annual TAC regional director’s report. The four directors take a look at the country’s current marketplace for tunnelling and underground construction, as well as milestones over the past year.
Salini Impregilo/Healy is Dugway Tunnel’s lowest bidder
09 October, 2014
USA - The Northeast Ohio Regional Sewer District (NEORSD) opened bids for its Dugway Storage Tunnel (DST) on September 10, with a JV of Salini Inpregilo/Healy.
Forming a Solution
27 June, 2014
Ben Roberds and Eric Gemin of Redpath describe the top heading and bench excavation method for the Waneta Expansion Project, and the challenges and benefits of using a self-advancing tunnel form on a 17 per cent slope.
King County awarded millions of dollars in lawsuit against contractor
07 May, 2013
A superior court awarded King County, Washington, USD 14.7M in legal fees last month in a dispute over a tunneling project for the Brightwater sewage-treatment plant in Woodinville, local press reported.
Cross passage excavation completed on U-Link
05 March, 2013
Construction is complete on University-Link cross passage, including one in particular that had been underway 100ft (30.5m) below the surface since July 2012.
How low can you go?
20 February, 2013
TBMs have successfully passed beneath the Montlake Cut on Seattle’s University Link Project with only 4m of cover. Andrew Mencke and Lynn Salvati of Jacobs Associates, Seattle, Richard McLane of Traylor Brothers, Seattle, and John Sleavin of Sound Transit, Seattle, explain the design and construction process
19 February, 2013
The west coast of the US is home to a strong tunnelling market. Tunnels North America looks at Seattle in particular this issue, but let there be no doubt, other cities in the region are just as busy underground, Nicole Robinson reports