The government pledge came after Texas-based Kinder Morgan said that it will scrap plans to almost triple the capacity of its Trans Mountain pipeline, which extends from Alberta's oil fields to British Columbia's coast, unless the legal and jurisdictional challenges ensnaring the project are resolved by May 31.
The company's April 8 decision to impose a May 31 deadline for government reassurance that it can safely spend the bulk of the project's $7.4-billion construction cost comes after two other projects were ended last year-TransCanada Corp.'s proposed Energy East pipeline and Enbridge Inc.'s previously approved Northern Gateway.
"Today, we're calling on the federal government to partner with B.C. and to submit a joint reference question to the Supreme Court so that Canadians can see that politicians can actually work together for the national interest", Singh said in a press conference Wednesday.
Project architect Kinder Morgan upped the ante this week by declaring it would suspend all non-essential spending on the project until there is more certainty it won't be blocked by British Columbia's NDP government.
The B.C. Premier was dismissive of Alberta's talk of buying into the Trans Mountain project.
"The premier of Alberta is entitled to do whatever she wants within her borders", said Horgan.
In addition to the Trans Mountain system, two other pipeline projects now are proposed to move crude oil from Alberta either to the Great Lakes or the Gulf Coast.
North Vancouver MP and Parliamentary Secretary to Environment Minster Catherine McKenna, Jonathan Wilkinson, said the Federal government went through a long process to understand the concerns of British Columbians, and to make sure they were addressed. "I think that's disappointing", Mr. Horgan told a reporter who raised the issue.
Speaking in Toronto, Morneau says Ottawa is looking at several options to ensure the Alberta-B.C. pipeline gets built, including a potential financial stake in the project.
The federal Liberal government granted approval of the project in 2016.
Some First Nation communities and residents of the B.C. Lower Mainland oppose the project because of the increased tanker traffic and oil-spill risk it would bring to coastal waters.
Notley has said the pipeline is critical to helping Canada's economy.
Alberta United Conservative Party leader Jason Kenney - who backs Ms. Notley's proposal to purchase the pipeline if necessary - is also demanding Ottawa slash federal payments to British Columbia, noting it has done so to Saskatchewan for failing to implement a carbon price.