Native American women performing a ceremony at the Sacred Stone protest camp. In April 2016 the Standing Rock Sioux Tribe began a protest at the Sacred Stone Camp near Cannonball, North Dakota to oppose the planned Dakota Access Pipeline (DAPL). Since then the camp has grown as activists from over 120 Native American 'Nations' or tribes have come together and stood in the path of the pipeline, stopping its progress. The Sioux claim they have a human right to clean water and that drilling beneath the Missouri River risks polluting their only water source with crude oil.The proposed 1,172-mile pipeline would cost 3.5 billion USD and carry about 470,000 barrels of crude oil a day. The pipeline's route would take it under the Missouri River, at a point just upstream from the Standing Rock reservation which, Sioux tribal members say, would mean their drinking water was vulnerable to pollution and their sacred sites threatened.