Today on Tunnels & Tunnelling International


Eglinton-Crosstown tunnel is half mined
27 January, 2015 TORONTO – Two TBMs mining the western segment of the Eglinton-Crosstown’s 10km tunnel, officially reached the half-way point of their journey on January 21 as they broke through the headwall at Allen Road.
  • New Lake Mead contracts to be awarded in 2015
    USA—The Southern Nevada Water Authority (SNWA) board of directors adopted in December a recommendation to design and construct a new Low Lake Level Water Pumping Station (L3PS) at Lake Mead, “within the swiftest feasible timeframe.”
  • Mesaimeer tunnel approaches halfway point
    QATAR - Almost 50 per cent of works on the first phase of the Mesaimeer tunnel project in Doha have been completed, according to local media. The project will discharge surface and groundwater into the sea once it has been completed.
  • Rotten ceiling beams culprit in hydropower collapse
    VIETNAM - Rotten ceiling beams caused the Da Dang-Da Chomo hydropower tunnel collapse according to a project investor. The chairman of the plant’s board of investors apologised to Lam Dong Province authorities for the collapse last month.
  • Investment deals signed between Russia and India
    RUSSIA/INDIA – The Russian Direct Investment Fund (RDIF) and Indian financial services company IDFC will each invest USD 500M in infrastructure projects in the two countries. The agreement was signed during a state visit by Russian president Vladimir Putin last month.


Alice in Auckland
18 December, 2014 Rhian Owen reports on the Waterview Connection project in Auckland, New Zealand
  • Old meets new
    THE MAYO B project (Figure 1) arose from the need of the Yukon Energy Corporation (YEC) to increase renewable power sources and meet system-wide load demands, while ensuring that diesel consumed to generate electricity was reduced.
  • Antipodean Anxiety
    Hailed as one of the world’s top safe-haven, value-retaining economies in recent years, New Zealand has been basking in the warm glow of a successful battle against a crash, but for how long? Rhian Owen reports
  • Tied together
    Tie-in works of a tunnel twinning project in northern British Columbia required drill and blast excavation of access tunnels leading to interconnection tie-in chambers that were excavated in hard rock to within 3m of the existing pressurised steel lined penstock. Mark Kellaway and Dave Young of Hatch and Hatch Mott Macdonald and Gordon Revey of Revey Associates, Inc., explains the geometrically complex excavation undertaken during a limited shutdown period when the penstocks were depressurized.
  • Hartbeat
    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.


Old dogs teach new tricks
13 January, 2015 BY NOW it's an autumn tradition in the UK. The leaves are turning, the daily commute has the added pleasure of the _ u virus, and a study has warned that we face a critical shortage of engineers.
  • Old wine for New wine
    POPE FRANCIS delivered a pep talk to the European Parliament last month. In it, he gently styled the continent as feeling haggard and elderly. No longer able to meet its challenges with vigour or vitality.
  • Remember the fifth of November
    In a couple of months it will be the 410th anniversary of the first attempt at the Gunpowder Treason in the UK. By the time this issue reaches you, Guy Fawkes Night (‘Bonfire Night’ in the UK) itself will have passed. But less well known is an attempt, 11 months earlier, to blow up the British Parliament with a tunnelled cache of explosives, rather than the less exciting option of a cellar rented beneath the seat of government itself.
  • Young members matter
    In the last 15 months there has been a flourish of countries establishing Young Member Groups in tunnelling organisations, and that includes both Canada and the US. In May the ITA General Assembly in Brazil approved the creation of an ITA Young Members Group. Its mission is to “bridge the generation gap and provide a technical network platform for young professionals in the tunnelling and underground space industry."
  • Oh Canada
    With the autumn conference season upon us the tunnelling community is next month heading to Vancouver to take part in the Tunnelling Association of Canada’s biennial conference.


9th China Tunnel & Bridge Summit
12 Mar 2015 - 13 Mar 2015 Shenzen
  • NASTT’s 2015 No-Dig Show
    15 Mar 2015 - 19 Mar 2015 NASTT’s No-Dig Show is the largest trenchless technology conference in North America, where professionals attend to learn new techniques that will save money and improve infrastructure. The overall No-Dig program is focused on one objective: helping you maximize your investment in trenchless technologies, services and applications.