The Standing Rock pipeline fight is the Standing Rock Sioux Tribe’s decade-long effort to stop the Dakota Access Pipeline from crossing beneath Lake Oahe on the Missouri River, just upstream of the reservation’s drinking water. It began with prayer camps on the North Dakota prairie in April 2016, grew into the largest Native American demonstration in modern U.S. history, and continues in federal court in 2026, even after the Army Corps of Engineers granted the pipeline a new federal easement in May of that year.
What the Fight Is About
The Dakota Access Pipeline is a 1,168-mile crude oil line built by Energy Transfer to carry roughly 540,000 barrels per day from North Dakota’s Bakken formation to a terminal in Illinois, about four percent of daily U.S. oil production.1CBS News. Dakota Access Pipeline Standing Rock Federal Approval The U.S. Army Corps of Engineers has jurisdiction over roughly 37 miles of the route and 202 water crossings, but the dispute has always centered on one stretch: the half-mile crossing beneath Lake Oahe, a reservoir on the Missouri River that supplies water to the Standing Rock Sioux Reservation immediately downstream.2U.S. Army Corps of Engineers. Dakota Access Pipeline
The tribe’s claims rest on the 1851 and 1868 Treaties of Fort Laramie, which established lands for the Great Sioux Nation and reserved hunting and fishing rights. The pipeline route runs through territory covered by the 1851 treaty.3University of Colorado Law School. Environmental Justice and Tribal Sovereignty The tribe has also invoked the Winters doctrine of reserved water rights, arguing the pipeline threatens waters protected under those treaties.4Standing Rock Sioux Tribe. Water Wars Supreme Law A rupture at the Lake Oahe crossing, the tribe argues, would contaminate the reservation’s drinking water and damage culturally significant sites.5Earthjustice. The Dakota Access Pipeline
Advocates have also pointed to the pipeline’s routing. The original proposed path ran near Bismarck, a predominantly white city, but was shifted toward the Standing Rock reservation after concerns were raised about Bismarck’s water supply.6NRDC. Dakota Access Pipeline What You Need to Know
The Protest Camps
Opposition began building in 2014, when Standing Rock representatives first met with Energy Transfer about the proposed route. On April 1, 2016, the tribe established the Sacred Stone camp near the planned Lake Oahe crossing, and an online campaign under the hashtag #NoDAPL launched alongside a petition that eventually gathered nearly 560,000 signatures. By August, demonstrators were physically blocking construction equipment, and at least 28 had been arrested.7Britannica. Standing Rock Protests
A turning point came on September 3, 2016, when the tribe reported that construction crews had bulldozed an area containing significant Native artifacts and sacred sites. Private security guards used dogs against demonstrators that day; the tribe reported that six people were bitten and at least 30 were pepper-sprayed. Governor Jack Dalrymple activated the National Guard five days later.8NPR. Key Moments in the Dakota Access Pipeline Fight
The main encampment, Oceti Sakowin, grew to support as many as 11,000 people at its peak and drew representatives from more than 300 tribes.9Yes! Magazine. My Seven Months of Living at Standing Rock It ran as a self-sustaining community with a homeschool, medic tent, security force, and media teams. Weapons, drugs, and alcohol were prohibited.10The Guardian. Standing Rock Indigenous People History
Backwater Bridge
The most violent confrontation came on the night of November 20, 2016, at Backwater Bridge. Law enforcement deployed water cannons, tear gas, rubber bullets, and concussion grenades against demonstrators in 27-degree temperatures. The Standing Rock Medic and Healer Council called it a “mass casualty incident,” reporting that roughly 300 people were treated for injuries, including 168 for hypothermia. At least 26 were hospitalized.11The Intercept. Medics Describe How Police Sprayed Standing Rock Demonstrators Among the most seriously injured was Sophia Wilansky, a 21-year-old who suffered devastating damage to her arm from what medics identified as a concussion grenade. The Morton County Sheriff’s Department denied using concussion grenades and attributed Wilansky’s injuries to explosives it said were used by protesters. The ACLU, Amnesty International, and the National Lawyers Guild called for a Department of Justice investigation.12The Guardian. Dakota Access Pipeline Water Cannon Police Standing Rock Protest
Arrests and Prosecutions
By the time the camps were cleared, more than 830 criminal cases had been filed in North Dakota state courts, along with seven federal cases. As of October 2017, 289 had been dismissed outright, 105 resolved through plea deals or pretrial diversions, and only 10 had resulted in convictions.13Native American Rights Fund. Water Protector Legal Collective At least 10 journalists were also charged, most with misdemeanor trespassing or engaging in a riot, for covering the protests.14Committee to Protect Journalists. Journalists Covering Standing Rock Face Charges
The most high-profile defendant was Red Fawn Fallis, an Oglala Sioux woman arrested on October 27, 2016. Authorities alleged that a firearm discharged three times during her arrest. The gun belonged to Heath Harmon, a member of the Fort Berthold Reservation who had been working as an FBI informant and had entered into a romantic relationship with Fallis weeks before.15The Intercept. Standing Rock Dakota Access Pipeline FBI Informant Red Fawn Fallis16U.S. Department of Justice. Colorado Woman Sentenced Civil Disorder During Dakota Access Pipeline Project17Native News Online. Standing Rock Water Protector Red Fawn Fallis Released From Federal Prison
TigerSwan Surveillance
Energy Transfer hired TigerSwan, a private military contractor founded by retired Army Colonel James Reese, to manage security operations. Leaked internal documents revealed that TigerSwan used counterinsurgency tactics against demonstrators, characterizing the water protector movement as an “ideologically driven insurgency” and using military language about the need to “find, fix, and eliminate” threats. The firm conducted aerial surveillance with helicopters and drones, eavesdropped on radio communications, infiltrated camps using operatives under false identities, and shared daily intelligence reports with the FBI, DHS, U.S. Marshals, and local police.18The Intercept. Leaked Documents Reveal Security Firms Counterterrorism Tactics at Standing Rock
TigerSwan operated in North Dakota for months without a required state security license. After the North Dakota Private Investigation and Security Board sued, the firm settled for $175,000, far less than the $2 million the state initially sought. Over 50,000 pages of internal documents were made public after the North Dakota Supreme Court ruled them public record in 2022, though Energy Transfer continues to contest the release of thousands of additional pages.19Grist. TigerSwan Documents Dakota Access Pipeline Standing Rock Surveillance A class-action civil rights lawsuit against the firm, brought by plaintiffs including Standing Rock tribal members, remains pending.
How the Camps Ended
In December 2016, the Obama administration denied the federal easement for the Lake Oahe crossing and announced plans for a full environmental impact statement. Four days after his inauguration in January 2017, President Trump signed an executive memorandum directing the Army Corps to expedite the pipeline’s approval.7Britannica. Standing Rock Protests The Corps canceled its planned environmental review and granted the easement on February 7, 2017.8NPR. Key Moments in the Dakota Access Pipeline Fight Governor Doug Burgum set a February 22 deadline for protesters to leave, and the following day police and National Guard members moved in and cleared the Oceti Sakowin camp by force. Oil began flowing through the pipeline in June 2017.
The Federal Lawsuit
The tribe sued the Army Corps of Engineers on July 27, 2016. The central legal question was whether the Corps had complied with the National Environmental Policy Act when it approved the Lake Oahe crossing without a full environmental impact statement.
The District Court Rulings
The case went to Judge James Boasberg in the U.S. District Court for the District of Columbia. In 2017, Boasberg ruled that while the Corps had generally complied with NEPA, there were “substantial exceptions”: the agency had failed to adequately consider whether the pipeline’s effects were “highly controversial,” had not properly analyzed the impact of a potential oil spill on tribal fishing and hunting rights protected under the Fort Laramie treaties, and had not addressed environmental justice concerns. The court remanded for the Corps to fix those deficiencies. When the Corps’ revised analysis still failed to adequately address expert critiques of leak-detection systems, operator safety records, and worst-case discharge scenarios, Boasberg in March 2020 ordered a full environmental impact statement.20Policy Integrity. Standing Rock Sioux Tribe v. U.S. Army Corps of Engineers, District Court Decision In July 2020, the court vacated the easement entirely and ordered the pipeline shut down and emptied.
The D.C. Circuit’s Reversal
The D.C. Circuit Court of Appeals affirmed the requirement for an environmental impact statement but reversed the shutdown order. The court held that the pipeline’s easement approval and its physical operation were distinct matters, and that ordering a shutdown required meeting the traditional four-factor test for an injunction, which the district court had not applied.21Harvard Law Review. Standing Rock Sioux Tribe v. U.S. Army Corps of Engineers The result was a legal anomaly: the pipeline kept pumping oil on federal land beneath Lake Oahe without a valid federal easement while the Army Corps prepared the court-ordered review.
The Environmental Impact Statement
The Corps published a draft environmental impact statement in September 2023 and a 464-page final version on December 19, 2025. The study evaluated five alternatives: continued operation with no changes, continued operation with new safety conditions, shutting down and leaving the pipe in the ground, shutting down and removing it, and rerouting north of Bismarck. The Corps concluded the pipeline was at lower spill risk than the average pipeline, noted 12 minor spills at above-ground facilities (none under Lake Oahe or along the main route), and found that shutdown would cause “permanent, moderate to major adverse impacts on the local economy.”22North Dakota Monitor. U.S. Army Corps Says Oil Should Keep Flowing Through Dakota Access Pipeline in Long-Awaited Study
The Standing Rock Sioux Tribe had withdrawn as a cooperating agency on the study in January 2022, citing “serious safety concerns” and a lack of transparency. Chairman Steve Sitting Bear said the final report “does not remedy” concerns about safety, sovereignty, or consultation.22North Dakota Monitor. U.S. Army Corps Says Oil Should Keep Flowing Through Dakota Access Pipeline in Long-Awaited Study
Where the Fight Stands in 2026
On May 21, 2026, the Army Corps signed a Record of Decision officially granting a new easement for the pipeline to cross Lake Oahe, closing out the six-year environmental review. The decision selected “Alternative 4,” approving continued operation with additional safety requirements: enhanced leak detection, groundwater and surface water monitoring, water supply contingency planning, tribal-coordinated subsistence studies, and independent expert reviews of safety systems. Adam Telle, the assistant secretary of the Army for Civil Works, described the move as part of “President Trump’s American energy dominance agenda.”23North Dakota Monitor. Army Corps Grants Final Approval for Dakota Access Pipeline
The tribe has not conceded. An appeal remains pending before the D.C. Circuit challenging a March 2025 district court ruling that dismissed the tribe’s 2024 lawsuit over the pipeline’s operation without an easement. In its appellate brief, the tribe invoked the Supreme Court’s Loper Bright ruling, which overturned longstanding judicial deference to agency interpretations of law, arguing that courts must independently determine whether the Mineral Leasing Act permits the Corps to allow a pipeline to operate without an easement.24Harvard Environmental and Energy Law Program. Dakota Access Pipeline Tracker Chairman Sitting Bear stated: “The Tribe will evaluate all legal and political options to defend our Treaty rights, protect Mni Wiconi — Water of Life, and hold the Federal government and private corporations accountable.”23North Dakota Monitor. Army Corps Grants Final Approval for Dakota Access Pipeline Further litigation is widely expected.1CBS News. Dakota Access Pipeline Standing Rock Federal Approval
Energy Transfer and its subsidiary are also in the early stages of planning an expansion that would move an additional 250,000 barrels of crude daily through a new 56-mile connecting line in partnership with Enbridge, with a final decision expected in mid-2026.1CBS News. Dakota Access Pipeline Standing Rock Federal Approval6NRDC. Dakota Access Pipeline What You Need to Know24Harvard Environmental and Energy Law Program. Dakota Access Pipeline Tracker
The Protest-Law Aftermath
Standing Rock triggered a wave of state legislation aimed at criminalizing protest near pipelines and other energy infrastructure. As of 2026, 45 states have considered 384 protest-related bills, with 57 enacted. Many define pipelines and construction sites as “critical infrastructure” and impose felony penalties for trespassing or interference. North Dakota made it a felony to interfere with critical infrastructure construction or repair. Louisiana subjected nonviolent offenses like obstruction to racketeering penalties of up to 50 years. Oklahoma’s law allows organizations found to be conspirators in infrastructure offenses to face fines of up to $1 million.25ICNL. US Protest Law Tracker
Some of these laws have been challenged. A federal judge enjoined key provisions of South Dakota’s “Riot Booster Act,” ruling them unconstitutionally overbroad because they targeted pipeline protests and impinged on protected speech. In Louisiana, a federal judge denied a motion to dismiss a challenge to the state’s critical infrastructure law, after which the district attorney dropped charges against more than a dozen protesters.26House Committee on Oversight and Reform. Elly Page Testimony
For the Standing Rock Sioux, the fight that began with a prayer camp on the banks of the Cannonball River in 2016 continues in federal court a decade later, with no end clearly in sight.