Archambault said the tribe would fight the easement in court.
For months, the demonstrators have been trying to block the highly contested pipeline which they say violates sovereign treaty rights and could contaminate their water supply.
The Army Corps of Engineers plans to install two mobile stream gauges on the Cannonball River in North Dakota area where Dakota Access pipeline opponents have camped for months.
Three of those people join us to talk about their reasons for going to the Standing Rock Sioux Reservation and how the lessons of that resistance resonate in Northern California and Southern Oregon.More news: Hillary Clinton turns over a new leaf
The Dakota Access Pipeline is being built by a subsidiary of Texas-based firm Energy Transfer Partners (ETP).
The Army Corps of Engineers said Wednesday it has started a review for the permit, but that the easement had not been granted.
In his first week in office, President Trump issued an executive order demanding the revival of the Dakota Access Pipeline and the controversial Keystone XL Pipeline, both of which Barack Obama had halted.
That easement, if approved, would allow the final segment of the $3.8 billion project to be built under a section of the Missouri River at Lake Oahe in North Dakota.More news: Senate confirms Rex Tillerson to be next Secretary of State
The $3.8-billion, 1,172-mile pipeline, which would carry up to 570,000 barrels of oil a day from the Bakken oil patch in northwest North Dakota to a terminal in IL, then on toward the Gulf of Mexico, is all but complete.
However, his decision was met with protest from the Standing Rock Native Americans, who later on Tuesday issued a statement saying that the tribe will challenge "any suspension of pipeline's environmental review". The easement has not officially been granted - contrary to Rep. Kevin Cramer's (R-ND) statement - and the Standing Rock Sioux Tribe has pledged to vigorously pursue legal action to ensure that the Environmental Impact Statement (EIS), ordered in December by President Obama, is completed. In a statement posted on Facebook they said, "We stand ready to fight this battle against corporate interest superseding government procedure and the health and well-being of millions of Americans".
"Regardless of this incident it is our desire to continue the dialogue with tribal and camp leaders so that the camps continue to be cleaned and protesters leave prior to the flooding season", Morton County Sheriff Kyle Kirchmeier said in a statement.
"President Trump has proven to be a man of action and I am grateful for his commitment to this", Cramer said.More news: Trump's Border Wall Could Cost $120 per American Household
The Indigenous Environmental Network raised concerns that attempts to force through approval would stoke tension at protest camps, where activists have already clashed with law enforcement.