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Court Rules Dakota Access Pipeline Needs

Further Environmental Review



May 4, 2020
The Dakota Access Pipeline (DAPL), a crude oil pipeline developed by Energy Transfer Partners, carries
crude oil from the Bakken fields in northwest North Dakota to southern Illinois. As discussed in this
Legal Sidebar, the DAPL has been the subject of extensive debate and media attention, as well as
prolonged litigation. Much of the attention on the DAPL centers on the portion of the pipeline route that is
near or runs under Lake Oahe in North Dakota, a lake that has particular significance to Native Americans
in the region. The U.S. District Court for the District of Columbia (D.C. District Court) recently held that
this controversial portion of the route needs further environmental review.

Background on DAPL Environmental Review

Because the pipeline crosses waters subject to regulation under the Clean Water Act and land controlled
by the federal government, federal law required the Army Corps of Engineers (Corps) to issue several
authorizations for the project, including authorization for the stretch of pipeline under Lake Oahe. The
Corps' federal actions triggered the National Envirownental Policy Act (NEPA), which requires federal
agencies to assess the environmental impacts of a proposed action before making a decision about that
action. Under NEPA, agencies considering actions not eligible for categorical exclusions must prepare
Environmental Assessments (EAs). If the federal action will significantly affect the quality of the human
environment, agencies must prepare an Environmental Impact Statement (EIS). (Sometimes the agency
skips the EA and moves directly to prepare the EIS.) Despite a pre vious determination that the Corps
should prepare an EIS to assess the environmental impacts of the Corps action in depth, a 2017
Presidenial Memorandum encouraged the Corps to consider a previously published EA-one that
concluded with a Finding of No Significant Impact- sufficient to satisfy NEPA.

Litigation over NEPA Compliance
The Corps followed the Presidential Memorandum and did not prepare an EIS. Instead, it finalized its
decision to issue a right of way under Lake Oahe and notified Congress in February 2017. However, a
number of groups challenged the Corps' decision, alleging, among other things, that the Corps had not
satisfied NEPA's requirements. The D.C. District Court fomd flaws in the Corps' NEPA compliance. As a

                                                                Congressional Research Service
                                                                https://crsreports.congress.gov
                                                                                    LSB10457

CRS Lega Sidebar
Prepared for Members aisd
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