Line 10 Westover Segment Replacement Project

Pipeline segment replacement complete, final project work underway

After years of planning and obtaining all the necessary permits, construction of the Line 10 Westover Segment Replacement Project (WSRP) was completed in the spring of 2018.

With the new 35-kilometre segment in place and running from Enbridge’s Westover Terminal to the Nanticoke Junction, Line 10 was placed back into service in late April.

Now the focus of work has shifted to completing the remaining elements of the Line 10 WSRP – decommissioning of the segment that has been replaced and post-construction restoration of the right-of-way (ROW).


Decommissioning of the replaced 32-km segment began in May and is expected to run through the end of October. The work includes emptying and safely cleaning the inside of the pipeline and disconnecting it from service. The line will be segmented in select locations to ensure it does not become a water conduit and that environmentally sensitive areas along the ROW will be protected.

As this work proceeds, the safety of people and the environment remains Enbridge’s number one priority. This priority includes both pipelines that are in service and those that are not. Enbridge’s regulator, the National Energy Board, approved Enbridge’s proposal to leave the decommissioned pipeline in place as it is the safest and least disruptive option for decommissioning the existing pipeline.

Following decommissioning, the replaced segment of Line 10 will continue to be maintained and monitored. This includes continued patrolling of surface conditions, mowing brush, maintaining signage, continued inclusion in the Ontario One-Call program, and retaining the pipeline within Enbridge’s emergency response protocols.


Restoring the right-of-way

Restoration of the segment replacement ROW is expected to commence in August and run through the end of October. Our goal is to restore the pipeline right-of-way to as close to pre-construction condition as possible, and minimize our long-term impact to the land along our pipelines.


Proposed Enbridge sale of Line 10

In early May, an application regarding the proposed sale of Enbridge’s Line 10 to Westover Express Pipeline Limited was filed with the National Energy Board.

Westover Express is a wholly owned subsidiary of United Refining Company, a New York based independent refiner and marketer of petroleum products, United has been in business for more than 100 years. Founded in 1902, today United fuels cars, trucks, farm and construction equipment and heats homes and businesses in Pennsylvania and portions of New York and Ohio.

United owns and operates a modern, fully equipped refinery in Warren, Pennsylvania which produces unleaded gasoline, kerosene, diesel fuel, Number 2 home heating oil, industrial fuels, liquefied petroleum gas, propane and several grades of asphalts. Line 10 provides feedstock for this refinery, via a United-owned connecting pipeline near Buffalo, New York.

Assets included in the sale of Line 10 include the mainline pipe, the mainline pump station at Westover, the sectionalizing valves along the pipeline, the sending and receiving traps, and pipeline instrumentation.

No change to the operation of Line 10 is included in this application for approval of the sale. Enbridge is committed to ensuring a seamless transition of ownership of Line 10 to Westover Express. Under the terms of our agreement, Enbridge will continue to operate and maintain the pipeline and the ROW until at least 2022 following its sale.

Enbridge will continue to operate Line 10 in accordance with all applicable regulatory requirements, current crossing approvals and to the standards our stakeholders in the community expect and deserve. Upon approval of the sale, Enbridge will assign all existing crossing approvals that are held solely for Line 10 to Westover Express.