A bill introduced by Colorado’s U.S. Sen. Michael Bennet and Rep. Joe Neguse would protect 400,000 acres of land in Colorado.

The Colorado Outdoor Recreation and Economy Act, introduced to the House in January and most recently considered by committee in June, includes protections from oil and gas development for natural areas around the state, reports CPR.

One of those areas is the Thompson Divide, which residents have been trying to preserve for over 10 years.

“I don’t see it as not in my backyard,” said resident Brook Le Van to CPR. “I just see it as this is a place that’s pristine and needs to be protected.”

Colorado’s Republican U.S. Rep. Scott Tipton does not support the bill due to concerns over effects on snowmobile use, access to public lands and water protection, according to CPR. Tipton plans on introducing a different bill that would protect over 70,000 acres and release around 39,000 acres of wilderness study areas.

 Colorado’s U.S. Sen. Cory Gardner told CPR that he neither supports nor stands against the bill.

“There are parts of it are very good, I think, that have gotten more support. Parts of it still need to be worked out,” he said. “I’m not stopping it. I’m not blocking it. I hope they find agreement.”