Construction of the controversial Keystone XL pipeline was officially terminated on Wednesday, handing a big victory to environmentalists that fought the project for more than a decade as they intensified their battles against other fossil fuel development. The decision by TC Energy and the government of Alberta to pull the plug on the $8bn pipeline had been widely expected after Joe Biden scrapped the permit to build its US leg in one of his first acts as president.

“We remain disappointed and frustrated with the circumstances surrounding the Keystone XL project, including the cancellation of the presidential permit for the pipeline’s border crossing,” said Jason Kenney, Alberta premier. The project, which would have carried bitumen from the oil sands of northern Alberta to Gulf Coast refineries, had faced opposition from the outset and became symbolic of the political stand-off over the future of fossil fuels in the US.

It was blocked in 2015 by then-president Barack Obama, who said it would undermine US attempts to address climate change. But Donald Trump signed an order to push it forward during his first week in office. Biden’s decision to revoke the permit fulfilled a pledge made on the campaign trail.

In Canada, where politicians had lobbied to keep the project alive, Biden’s decision was greeted with dismay. This was especially true in Alberta, where the province had taken a $1.1bn stake in the project and lent TC Energy another $4-7bn for construction. Some 150km of the pipeline had already been installed in the Canadian province. Recommended The project employed about 2,500 people in the US and Alberta during the peak of construction last year. But building activity had been suspended since Biden’s decision to scrap the permit.

Production from Canada’s ultra-heavy oil  deposits is more carbon-intensive than most other forms of crude, making

Keystone XL a target for environmentalists, who argue that new pipeline projects encourage continued fossil fuel production at a time when the world needs to slash its emissions.

“Keystone XL has been a symbol for the challenges the sector has faced in getting high-profile projects permitted and built not just in western Canada but across North America,” said Moody’s analyst Gavin MacFarlane.