Aecon Group announced that its Construction and Materials division has been awarded a $36.5 million contract by GO Transit to design and build a rail-to-rail grade separation in Markham, ON.

The project involves designing and constructing a 1-mile concrete-walled open tunnel through which the GO transit rail line would run, as well as two bridges - one where the tunnel passes under the CN tracks at what is called the 'Hagerman Diamond' in Markham, and the other where the tunnel passes under 14th Avenue.

Aecon is the general contractor on the project and will self perform the excavation, drainage, tunnel construction, bridge construction and much of the utilities work on the project.

Construction will begin in late May and is scheduled to be completed in the fall of 2007.