Reversing Falls NPS 16

Project Information

Client: Enbridge Pipelines
Job Number: 22373
Work Type: Mainline Pipeline
Location: Saint John, New Brunswick
Contract Type: Cost Plus
Status: Complete
Duration: 2022-07-29T04:00:00.0000000Z2022-11-19T05:00:00.0000000Z
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The scope includes relocation of approximately 200m of NPS 16 pipeline off of rail bridge to facilitate mandated rehabilitation of the bridge piers by the rail company. Stopping and tapping and stopple installation at two locations, one elevated, allowed temporary 10" pipe to be used to bypass the bridge during rehabilitation so not to disrupt supply. The permanent 16" pipe was relocated to grade during the final stages of trestle removal. This involved the use of a custom shoring system where a retaining wall prevented sloping. The main challenges were due the limited space on location. Attentive coordination was required between multiple companies performing operations together, including rail company who continued to operate tracks during the project. The lack of space also required detailed planning of a significant scaffolding structure used to install the elevated stopple, replacement pipeline and pipeline support structure.