The U.S. Army Corps of Engineers has set an early December deadline for American Indians and others to leave an encampment in North Dakota where they’ve been entrenched for months protesting the Dakota Access pipeline.
Tribes including the Standing Rock and Cheyenne River Sioux are fighting the Dakota Access project because they fear it will harm drinking water and cultural sites. Texas-based pipeline developer Energy Transfer Partners says the 1,200-mile pipeline through the Dakotas, Iowa and Illinois will be safe.
Here is a guide to the latest developments and key background about the protest:
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The Corps said last week in a letter to Standing Rock Sioux tribal leader Dave Archambault that all federal lands north of the Cannonball River will be closed to public access Dec. 5 for “safety concerns.” The order includes the sprawling encampment called Oceti Sakowin, or Seven Council Fires camp, that is a living protest against the four-state $3.8 billion pipeline.
The Corps cited North Dakota’s oncoming winter and increasingly contentious clashes between protesters and police. The agency says “it has no plans for forcible removal,” but anyone on land north of the river after the deadline will be trespassing and may be prosecuted.
The Corps acknowledged that “more dangerous groups have joined this protest and are provoking conflict in spite of the public pleas from tribal leaders.”
The agency previously said it would not evict protesters due to free speech reasons.
The Corps’ letter came after residents in the area expressed feeling unsafe and frustrated with how the protest has swelled to scores of self-described “water protectors.” North Dakota officials contend the Corps should not allow people to be on the land without a permit.
More than 525 people from across the country have been arrested since August. In a recent clash between police and protesters near the path of the pipeline, officers used tear gas, rubber bullets and large water hoses in freezing weather. Organizers said at least 17 protesters were taken to the hospital, some for hypothermia and one for a serious arm injury. One officer was injured.
North Dakota officials say the protest has cost the state about $20 million in extra law enforcement costs.
The Oceti Sakowin camp is the overflow from smaller private and permitted protest sites nearby and began growing in August. It’s been called the largest gathering of Native American tribes in a century.
Standing Rock tribal members and other Native Americans believe the land with the encampment is rightly owned by the Sioux through a more than century-old treaty with the U.S. government.
Protest organizers said they don’t intend to leave or stop their acts of civil disobedience. Archambault and others don’t believe the Corps will forcibly evict people from the camp.
Energy Transfer Partners got federal permits for the pipeline in July, about two years after it was announced. The pipeline is projected to move 500,000 barrels of crude oil daily to an existing pipeline in Patoka, Ill., for shipment to Midwest and Gulf Coast markets.
Supporters say the pipeline will have safeguards against leaks, and is a safer way to move oil than trucks and trains, especially after a handful of fiery – and sometimes deadly – derailments of trains carrying North Dakota crude.
The Standing Rock Sioux, whose reservation straddles the North Dakota-South Dakota border, are suing federal regulators for approving the pipeline. They have challenged the Corps’ decision to grant permits at more than 200 water crossings and argue that the pipeline would be placed less than a mile upstream of the reservation, potentially affecting drinking water for more than 8,000 tribal members and millions downstream.
The tribe hasn’t fared well in court. A federal judge in September denied its request to block construction of the entire pipeline. An appeal is pending.
The nearly 1,200-mile pipeline is largely complete except for a section that would pump oil under Lake Oahe, a Missouri River reservoir in southern North Dakota.
The Corps of Engineers in July granted Energy Transfer Partners the permits needed for the crossing, but the agency decided in September that further analysis was warranted given the tribe’s concerns. Since then, the Corps has called for even more study and tribal input.
The company responded by asking U.S. District Judge James Boasberg to declare that it has the right to lay pipe under Lake Oahe. The judge isn’t likely to issue a decision until January at the earliest.
President Barack Obama earlier this month raised the possibility of rerouting the pipeline, and Archambault has said that would be acceptable to the tribe provided the new route isn’t near the reservation.
Archambault and others have called on Obama to stop the pipeline altogether.
Energy Transfer Partners CEO Kelcy Warren told The Associated Press that the pipeline won’t be rerouted and the company has no alternative than to stick to its plan.
President-elect Donald Trump holds stock in Energy Transfer Partners. Pipeline opponents worry that Trump’s investments could affect any decision he makes on the project as president.