The proposed C$570 million (US$428 million) expansion project would include 88 kilometres of new pipeline to the NGTL system, a new compressor station, about 35 new and expanded meter stations, and other associated facilities.

"Our NGTL system is sitting on top of extensive natural gas supplies, making it well-positioned to unlock the resource and reliably and efficiently link it to growing markets," said TransCanada chief executive Russ Girling.

"The