Enbridge Gas Inc. (“Enbridge”) has identified the need to abandon and replace approximately 16 km of nominal pipe size (NPS) 12 inch extra-high pressure (XHP) steel natural gas main in the City of Ottawa. The project under consideration represents Phases 3 and 4 of a four-phase plan for replacing the existing St. Laurent Pipeline. Phase 1 and 2 have been completed.

The pipelines to be abandoned will be replaced with, approximately: 9 km of NPS 12 XHP ST; 2.4 km of NPS 16 XHP ST; 4.2 km of NPS 6 intermediate pressure (IP) polyethylene (PE); and 3.6 km of NPS 4 IP PE. Various other facilities (e.g. pipelines of smaller lengths and size) will also be abandoned and replaced.

The study is being conducted in accordance with the Ontario Energy Board (OEB) Environmental Guidelines for the Location, Construction, and Operation of Hydrocarbon Pipelines and Facilities in Ontario, 7th Edition. Enbridge has applied to the OEB for approval to construct the project.

Project information