Reaction in Colorado to President Donald Trump’s decision Tuesday to revive the Keystone XL and Dakota Access pipelines fell predictably along partisan lines, with environmental interests assailing the bold decision while Republicans hailed the new commander in chief.

The executive order on the Dakota Access pipeline directs the Army Corps of Engineers to “review and approve in an expedited manner” the pipeline.

The pipeline has been embroiled in controversy, led by the Standing Rock Sioux tribe and other Native American groups in the Dakotas. Those groups say construction would taint their water and disturb sacred burial sites.

The Army Corp of Engineers paused the project in December in an effort to further consider environmental impacts, as well as other possible routes for the pipeline. Trump’s order could have an immediate impact on its development.

Texas-based Energy Transfer Partners has been trying to complete the 1,172-mile pipeline, which would carry oil from North Dakota to Illinois.

The executive order on the Keystone XL pipeline would reverse course from the direction taken by President Barack Obama, who expressed concerns that the project would add to climate change.

Calgary-based TransCanada has expressed interest in revisiting the proposed pipeline. The 1,179-mile pipeline would run from the oil sands in Alberta, Canada, to refineries on the Gulf Coast.

Pete Maysmith, executive director of Conservation Colorado, said the orders by Trump offer an ominous sign for the next four years of environmental and energy policy.

“It took no time at all for President Trump to show that his energy and environmental agenda will be focused on fast-tracking the dirty, polluting energy sources of the past,” Maysmith said. “The economics of these projects don’t make sense, local communities are opposed to them, and they will have major impacts on our climate.

Not surprisingly, on the other side, Republicans applauded Trump for his decisive action.

“It is way past time for the Keystone pipeline to be completed,” said U.S. Rep. Scott Tipton, R-Cortez. “Ideally, Congress would have been able to work in a bipartisan manner to advance this important project. Unfortunately, we saw these efforts blocked at every turn by the previous administration.

“With this executive action, we will now be able to put many Americans back to work, lower energy costs and strengthen our energy security.”