Our Environmental Performance

ENERGY USE

OUR IMPACTS

Our liquids pipeline transportation systems in Canada and the United States primarily use electrical pumps, while our natural gas gathering and transmission systems mainly use natural gas as fuel. Our Enbridge Gas Distribution system in Ontario is powered by electricity and natural gas. Diesel fuel and natural gas are used to drive pumps in remote locations along the Enbridge Norman Wells (NW) system in the Northwest Territories.

OUR PERFORMANCE

Increased use of electricity in Liquids Pipelines

In 2004, electricity use on the Liquids Pipelines system was 2,970 gigawatt hours (10,692 thousand gigajoules), enough power to supply 262,000 homes. Energy use on the system was 17% higher than 2003 levels because of increased throughput on the system.

Optimizing natural flow rates for pipelines

We continually review natural flow rates for our liquids pipelines, as products on our pipelines and power contracts change. The rates are designed to optimize pipeline operating pressures to match equipment and the types of crude oil transported. In 2004, with completion of phase III of the Terrace Expansion Project from Edmonton to Superior, Wisconsin, we redesigned natural flow rates so as to pump more heavy oil in response to shippers' needs. We also applied natural flow rates to the Norman Wells pipeline system. By applying these rates to the pipeline, we expect to lower the high costs of fuel and reduce maintenance.

Adding renewable energy to our energy mix

We are diversifying fuel use in our Liquids Pipelines systems to include renewable energy. In 2004, we signed a 20-year agreement to purchase one-third of the power output of the 30 MW Magrath wind power project. This will be enough to supply 13% of Enbridge's total Alberta pipeline electricity requirements.

Managing energy use in Enbridge Gas Distribution

In Enbridge Gas Distribution, we carry out a comprehensive energy management program to minimize electricity use. We build energy efficiency into our various facilities by improving lighting, heating, information technology, and ventilation and cooling systems. At Enbridge Gas Distribution's Toronto headquarters, these efforts have continually lowered our energy consumption despite intensifying our use of building space. In 2004, we replaced overhead lighting, added energy efficient computer equipment and completed other projects that delivered over 500 kilowatt hours in energy savings. As compared with 1990, these and other efforts to date have reduced the building's energy consumption by 40% and saved $400,000 in 2004 annual electricity costs.

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At Enbridge, there are no dividing lines between good business practices and being a responsible company — one that is ethical, is a steward of the environment, is safe, engages its stakeholders and is attentive to social needs.

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