After the Regional Municipality of York secured all the required permits, a joint venture of McNally (70%) and Aecon (30%) is set to begin construction of the 16th Avenue trunk sewer, Phase 2. The CAD60 million project involves the construction of a 3.5 m-diameter tunnel to be built along 16th Avenue from Stone Mason Boulevard to east of Woodbine Avenue in the town of Markham. Totalling 7.2 km in length, the new trunk sewer will provide a connection to existing trunk sewers in the area and will allow for further development in the region. Construction is expected to begin this November and be completed by spring 2007. Visit www.region.york.on.ca, www.mcnallycorp.com and www.aecon.com 48/04.A joint venture of McNally International (70%) and Aecon Constructors (30%) has been awarded a CAD77.1 million tunnel contract by the Regional Municipality of York. The project involves the design and construction of two sanitary trunk sewers, each having a minimum internal diameter of 1.8 metres. The Bathurst collector sewer will run approximately 5.1 km along Bathurst Street north of Steeles Avenue, and the Langstaff trunk sewer will run approximately 3.7 km, primarily along Langstaff Road west of Bathurst Street. Construction of the sewers will involve Earth Pressure Balance (EPB) tunnelling technology. Construction will begin immediately and is scheduled to be concluded in the fall of 2008. Visit www.region.york.on.ca, www.mcnallyintl.com and www.aecon.com 22/06.Lovat has been contracted to design and manufacture twin 3.3 m-diameter EPB TBMs for the joint venture of McNally Construction and Aecon Group for the latest expansion of the sewer systems in the Regional Municipality of York, north of Toronto. Both TBMs will be operating below the local water table. The first TBM will bore 5.1 km northwards under Bathurst Street at a depth ranging from 9 to 30 m. The second TBM will bore westerly from an intermediate shaft of the Bathurst collector for 3.7 km at a depth ranging from 22 to 34 m, mostly under Langstaff Road. Geological conditions along the drives are characterised mostly by tills, slity clays and buried sands. Large quantities of cobbles and boulders are expected in both tunnel drives. The TBMs will feature a three-spoke design cutting head with a dressing of 20 back-loading ripper teeth which will be interchangeable with disc cutters. These mixed-face EPB TBMs will erect a tunnel liner comprised of prefabricated reinforced concrete segments with an outer diameter of 3.1 m, an internal diameter of 2.7 m and a length of 1.2 m. Grouting will occur through the segments. The first TBM is expected to be delivered on 26th December, 2006 and the second will follow on 27th January, 2007. Click ca/26. Visit www.lovat.com 31-32/06.Lovat has been contracted to design and manufacture a third 3.3 m-diametre EPB TBM for the JV of McNally Construction and Aecon Group. This newly designed and manufactured TBM will be identical to two recently ordered machines in June. Click ca/26. This TBM is also to be used by the contractors for the latest expansion of the sewer systems in York Region, north of Toronto. The machine will be building a tunnel lined with prefabricated reinforced concrete segments for a length of 4.2 km through medium sands and glacial tills (including many cobbles and boulders). The tunnel is completely under the water table to a depth of 18 metres above the crown. This will be the sixth Lovat TBM used by McNally/Aecon. It will be delivered in March 2007. Visit www.lovat.com 35/06.A joint venture of McNally International (70%) and Aecon (30%) has been awarded contract T-06-29, worth CAD69.2 million, by the Regional Municipality of York to construct an interceptor sewer of the York Durham sewage system (YDSS). The project involves the construction and commissioning of a total of approximately 4,307 metres of new concrete sanitary sewer. The first section consists of a 1,650 mm-diameter C301 concrete sanitary sewer on 19th Avenue, approximately 207 m long, to be constructed by open trench method. The second section consists of a 2.1 m-diameter concrete sanitary sewer on 19th Avenue and Leslie Street, approximately 4,100 m long, to be constructed by tunnelling. Construction of the tunnelled sewer will involve EPB tunnelling technology, which is designed to limit dewatering during construction through a section in the Oak Ridges aquifer complex. Two Lovat EPB TBMs will be required to complete this project within the allowed schedule. Construction will begin immediately and is scheduled to be concluded in January of 2008. The project will bring work to nearly 30 km of tunnel construction since Aecon and McNally began building tunnels for the Region in 2001, including the Bathurst Langstaff, 16th Avenue and 9th Line tunnel projects. Click ca/26. Visit www.region.york.on.ca, http://ydss.cenet.ca, www.mcnallycorp.com, www.aecon.com and www.lovat.com 39/06.