Port Mann Water Supply Tunnel: Lessons for the Future

摘要

After more than a decade of planning, design, and construction, the Port Mann Water Supply Tunnel was successfully brought into service in early 2017. The tunnel increases Metro Vancouver's (MV) capacity to meet water demand while increasing system reliability, and represents the first of several tunnel projects planned to improve seismic capacity of the system following a Maximum Credible Earthquake event. The contracting and management issues associated with delivering the project have been as complex and timeconsuming as some of the design and construction challenges. As well as explaining how the design and construction challenges were successfully addressed, the paper presents how Metro Vancouver approached contractor procurement through prequalification and negotiated proposal phases, presents the risk management approach and project team structure, and describes how the lessons learned on the project can be applied to future tunnel projects in the region.