The Canadian Pacific Railroad is the most famous case of federal involvement in infrastructure projects.
Bill C-69 would completely overhaul how major energy projects are reviewed by government in Canada.
For much of the summer, the federal government will backstop construction costs by Kinder Morgan, a private firm.
Pipeline expansion project may generate $50 billion in government revenue over 20 years.
The proposed Enbridge Line 3 pipeline would carry 760,000 barrels per day from Alberta to Wisconsin.
Cenovus recently announced it will cut production from some of its oilsand projects.