Line 5 Segment Replacement Project: St. Clair River Crossing

In November 2017, Enbridge entered into an agreement Is the segment crossing safe? higher tensile strength steel. The coating with the State of Michigan to If so, why replace it now? will be a fusion bonded epoxy likely with an abrasion-resistant overlay. New address the future of Line 5, Ongoing inspections and engineering remote-operated valves with continuous a 1,038-kilometre, 30-inch- studies show that Line 5 at the St. pressure monitoring will also be installed diameter pipeline that originates Clair River crossing remains safe to on both sides of the river. operate. The replacement of Line 5 in Superior, Wisconsin, travels at the St. Clair River is one of seven Will this project benefit the through Michigan’s Upper proactive measures resulting from our local economy? and Lower Peninsulas, and agreement with the State of Michigan, terminates in Sarnia, Ontario. and is not maintenance driven. We Pipelines projects like this bring believe the agreement demonstrates economic benefits to communities our commitment to doing the right thing through which they pass in the form of to serve the public interest in the Great potential job opportunities, municipal The agreement features seven key actions Lakes Region and enhance the overall and property tax revenues. As the Enbridge will undertake to enhance the safety of Line 5. project is currently in the planning overall safety of Line 5 and protect the phase, we haven’t yet determined waters of the Great Lakes, including workforce requirements in consultation How will this project enhance the replacement of the pipeline segment with construction service providers. safety of Line 5 and the St. Clair that crosses the U.S.-Canada border However, pipeline projects typically River crossing? at the St. Clair River from Marysville, provide opportunities for the following MI to Froomfield, ON. The segment In addition to ongoing improvements to disciplines: labourers, welders, replacement will be installed underneath our inspection and monitoring of Line 5, equipment operators, teamsters and the river bed using Horizontal Directional our agreement with Michigan includes drivers. This project will also stimulate Drilling (HDD), a proven construction a plan to replace the pipeline crossing at the local economy through the purchase method that is preferred for larger rivers the Straits of Mackinac. Regarding the of goods and services and items or certain sensitive crossings because it St. Clair crossing, we expect to install such as food and accommodation minimizes impacts on the surface area. pipe with a heavier wall thickness and for workers.

Suite 200 Toll-free: 1-888-263-3654 425 1st Street S.W. E-mail: [email protected] Calgary,AB T2P 3L8 Web: enbridge.com Line 5 – A key economic driver

Line 5 is an integral part of the Great Lakes 29 region’s critical energy infrastructure, providing a safe and efficient supply of crude oil to numerous regional refineries in both the U.S. and Canada, which in turn produce essential petroleum

products such as propane, gasoline, diesel r

e and asphalt. s

g i

Line 5 transports up to 540,000 barrels per day L (bpd) of light crude oil, light synthetic crude oil, and natural gas liquids (NGLs), which are refined into propane. ir C k e e s re o C o Talf rd b Line 5 delivers crude oil to refineries located in o u h

Lasalle Li W Lambton County, Ontario where it is refined into a 33 broad range of fuel and lubricant products to meet Ontario’s energy needs. 33

The products moved on Line 5 heat homes and businesses, fuel vehicles, and power industry in Ontario, Michigan and Ohio. Liquid Natural Gas (LNG) delivered to Michigan on Line 5 is processed into 380 million gallons of propane per year, accounting for about 65% of the propane that heats Upper Peninsula homes, and provides 55% of Michigan’s total propane needs. four months. Federal permit applications will be Decommissioning – the Safest Line 5 also supplies the vast majority of crude oil filed by the summer of 2018. feedstock to Marathon’s Detroit refinery and also Option carries up to 14,000 bpd of Michigan-produced Enbridge has notified landowners and light crude. Since 1953, Line 5 has carried about residents in the impacted work areas so Once the new pipe has been installed, our intent is 80 million barrels of Michigan-based crude that field assessments can begin. We will to decommission the replaced pipeline segment to market. work with landowners and all stakeholders by draining, cleaning and disconnecting it from to identify possible impacts and develop service, and sealing the ends with permanent strategies to mitigate project-related impacts physical barriers to prevent it from acting as a Replacing the Line 5 St. Clair where possible. We have also begun water conduit. Although the decommissioning outreach to nearby Indigenous communities, line is inactive, we continue to monitor it by River crossing municipalities, businesses and industrial/ maintaining cathodic protection. environmental associations and these Our plan is to replace the pipeline segment engagements will continue through the life Leaving the decommissioned pipeline in place is within the same corridor as the existing of the project. the safest and least disruptive option— it means crossing between Marysville, Michigan minimal disturbance to the environment, existing and Froomfield, Ontario. Horizontal Directional Drilling – infrastructure and the community. During construction, drilling equipment will be Minimizing Impact located on both sides of the river. The rig will be We want to located on the U.S. side and a reaming platform HDD is a proven construction technique will be located on the Canadian side. Although whereby advanced technology is used to drill hear from you land around the drill entry and exit locations an underground arc that travels down, under is disturbed during HDD activities, it will be and back up to the surface on the far side of a — restored to its pre-construction state upon water body or other crossing. For large rivers or As always, should you have any questions project completion. certain sensitive crossings, directional drilling is an or concerns regarding the St. Clair HDD appropriate and preferred construction method Segment Replacement Project, please call Construction will commence once all permit and because it minimizes impacts on the surface area our toll-free line at 1-888-967-3899, send authorizations are received. Once underway, above the drill. an email to [email protected] or construction is expected to last approximately visit Enbridge.com/StClairHDD

Suite 200 Toll-free: 1-888-263-3654 425 1st Street S.W. E-mail: [email protected] Calgary,AB T2P 3L8 Web: enbridge.com