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St. John’s Sideroad Road Reconstruction

Services, Transportation Services

St. John’s Sideroad Road Reconstruction

Client: Regional Municipality of York
Location: Town of Aurora, Ontario

Project Status: The project was officially completed on June 26, 2006, with a ceremony attended by local stakeholders, and Town and Regional officials and staff. The project cost was $20 million, and is one of the most environmentally significant projects undertaken by York Region to date

Project Description:

R.V. Anderson Associates Limited (RVA) was retained to undertake the design for the reconstruction and widening of St. John’s Sideroad between Yonge Street and Bayview Avenue. The project included:

  • Widening to a four-lane arterial roadway
  • New storm sewer system with mitigating measures at the environmentally sensitive McKenzie Marsh area
  • 450 mm diameter water main, including pipe ramming under the railway tracks
  • New traffic signals at two locations and streetlighting throughout the project
  • Stakeholder communications and public information centres
  • All required agency approvals

St. John’s Sideroad traverses the McKenzie Marsh, a highly sensitive environmental area. During the Environmental Assessment Study, numerous stakeholders raised concerns about the impact of the road widening on the marsh area. In order to minimize impacts, sheet-pile retaining walls were designed to contain the road widening through the marsh. Numerous discussions were held with stakeholders during the design to resolve any outstanding concerns.

The project also included full depth reclamation of the existing asphalt pavement in the easterly section of the project. A life-cycle analysis showed that full depth reclamation was preferred over other options such as complete reconstruction or resurfacing.

This project is the recipient of both the Ontario Public Works Association’s 2006 Project of the Year in the Environmental Category Greater Than $10 Million, and the American Public Works Association’s 2007 Transportation Project of the Year ($10–100 Million).


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