The Standing Rock Sioux Tribe last week renewed its opposition to the Dakota Access Pipeline in North Dakota with another court filing.

The group filed a motion for summary judgment with the U.S. District Court for the District of Columbia proposing the court vacate and remand the final environmental assessment of the U.S. Army Corps of Engineers that found no significant impact, and vacate the Mineral Leasing Act easement the Corps issued in 2016 in Standing Rock Sioux Tribe v U.S. Army Corps of Engineers, No. 16-01534.

The 1,172-mile Dakota Access is owned and operated by Dallas-based Energy Transfer Partners LP (ETP), and since 2017 has moved 570,000 b/d from the Bakken Shale and Three Forks formationto Gulf Coast markets. The pipeline has faced persistent opposition from the Standing Rock, typified by its public protests in North Dakota during 2016.

In October 2017, U.S. District Judge James Boasberg said he would not vacate a previous permit while an environmental review was conducted, allowing continued operations of the pipeline.

In its most recent filing, the tribe asked for a determination that the “impacts of the defendant’s decisions are ‘significant’ under the National Environmental Policy Act,” and to direct the Army Corps to “commence preparation of an environmental impact statement as required by law.”