Pipeline Construction: Safety and the environment

Pipeline Construction: Safety and the environment Safety and reliability are built into Enbridge's energy infrastructure before, during, and after the construction phase. We take care to limit our footprint, and actively manage potential effects on communities and the environment, as we build our pipeline projects. Building a pipeline, step by step Clearing the right-of-way Field surveys and staking 3 Stripping and storing topsoil 6. Stringing (placing pipe sections along the ROW) Bending 4 Grading Welding 6. Trenching Coating 10 Lowering-in and backfilling (11 12 Hydrostatic testing Cleanup and Reclamation Limiting our footprint As we plan and build our pipeline projects, we make every effort to limit our construction footprint. This includes: Using pre-existingrights-of-way, suchas utility corridors, where possible • Using horizontal directional drilling (HDD) tech- nology, which involves drilling an underground arched tunnel, whenever possible to install underground pipelines across largerivers or sensitive crossings • Working closely, and continuously, with regulato- ry agencies, and complying at all times with all environmental requirements • Using existing access routes to and from con- struction sites, minimizing temporary workspace, and limiting ground disturbance Staying safe on the roads During construction, residents canexpect to see an increase in Enbridge traffic – heavy-haul vehicles, buses and crew trucks – on highways, secondary highways and rural township roads. To manage traffic volume and ensure public and worker safety, we make sure to: Develop a trafficaccommodation plan to minimize impacts to community residents • Move heavy equipment across roads during off-peak hours • Bus crews to and from the construction site where possible • Actively communicate with the local community on any disruptions to normal traffic patterns Pay strict adherence to mandated noise limits • Install and maintain proper signage at work sites, road and temporary access crossings • Build protective structures to prevent damage to road surfaces and facilitate equipment and truck crossings Habitat restoration Following construction, we minimize our long-term impact to the land along our pipelines. Our habitat restoration methods include: • Reclamation, including soil replacement, seeding, and tree planting Environmental monitoring and mitigation • Follow-up landowner outreach ENBRIDGE For more information, please visit enbridge.com