LEA Consulting Ltd. has been retained by The Municipal Infrastructure Group Ltd. (TMIG) to provide Structural Engineering Services for the design of two pedestrian bridges in the development area north of Major Mackenzie Drive and west of Weston Road across Purpleville Creek.
The bridges will provide pedestrian access between both sides of the valley once the area is developed. Each bridge will include sanitary sewer services consisting of a gravity sewer and a potable water main, with an accessible walkway alongside the utilities for maintenance and inspections purposes. The utilities and associated walkways will not be visible to bridge users as they will be constructed in the space between the structural steel girders.
The north bridge consists of 3 spans and the south bridge consists of 4 spans, with a total length of 172 m and 219 m respectively, and a maximum span of 75 m in both bridges. Both structures consist of two steel plate girders, a cast-in-place concrete deck, and will be supported on pressure grouted micropiles.
The piers of both bridges are located outside the creek historic meander belt to minimize impacts on the existing grading and valley vegetation.
Construction of the two bridges is scheduled to be completed in 2017.