TransCanada Corp, Canada's second-largest pipeline company, reported a 14.9 per cent decline in quarterly profit due to costs related to its acquisition of Columbia Pipeline Group.

Net income attributable to the company's common shares fell to $365 million, or 52 Canadian cents per share, in the second quarter ended June 30 from $429 million, or 60 Canadian cents per share, a year earlier.

The Calgary-based company's revenue rose 4.6 per cent to $2.75 billion.

TransCanada completed the $10.3 billion acquisition of Columbia Pipeline on July 1, creating one of North America's largest natural gas transmission businesses.