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              Congressional                                             ______
          a    Research Service
               informrng the egisI tive debate since 1914___________________




Court Rules Dakota Access Pipeline Needs

Further Environmental Review



Updated February 1, 2021
UPDATE:   On January 26 2021, the U.S. Court ofAppeals for the D.C. Circuit affirmed the district
court's decision requiring the Army Corps of Engineers to prepare an Environmental Impact Statement
(EIS) prior to issuance of an easement across federal land for the Dakota Access Pipeline, but reversed
the district court's injunction prohibiting the operation of the Pipeline and directing that it be emptied of
oil. The original Sidebar discussing the district court case is below.
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 Environmental 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 EIS. (Sometimes the agency skips the EA and moves directly to
prepare the EIS.) Despite a previous determination that the Corps should prepare an EIS to assess the
environmental impacts of the Corps action in depth, a 2017 Presidential Memorandum encouraged the
Corps to consider a previously published EA-one that concluded with a Finding of No Significant
Impact- sufficient to satisfy NEPA.



                                                                Congressional Research Service
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CRS Legal Sidebar
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