The lawsuit claims that Secretary of the Interior Ryan Zinke and the BLM didn’t properly assess the environmental impact of drilling on the land.
A decision about whether to move the BLM and where isn’t expected for many months.
The Secretary of the Interior was making an appearance at a private event sponsored by the conservative Steamboat Institute’s Freedom Conference.
The Center for Biological Diversity, a conservation group, said Sheehan’s departure was “welcome news for America’s wildlife.”
Sen. Michael Bennet has cosponsored, and Sen. Cory Gardner supports, a bill that could raise $6.5 billion for parks maintenance.
The National Park Service office oversees Yellowstone, Grand Teton and dozens of other national parks in eight states.
The congressional district's representative is making a case for the Western Slope.
“To be the name that pops up at the top of the BLM conversation is wonderful for us,” said Robin Brown from the Grand Junction Economic Partnership.
Secretary Ryan Zinke is planning to move BLM headquarters. Coloradans in Congress are angling for a Colorado location.
"We do not believe the bison population level is too high or that any scientific studies would substantiate that," Superintendent Dan Wenk says.