Sen. Heidi Heitkamp (D-N.D.) is working with an unnamed group of senators on legislation that “stops pushing coal to the wayside,” a plan she announced while bashing proposed federal carbon pollution standards for new power plants.

Heitkamp, a centrist freshman who has split with President Obama on key energy policies, took aim Friday at newly proposed Environmental Protection Agency (EPA) rules that place fresh hurdles before efforts to build new coal-fired power plants.

“Whether or not this regulation becomes final, I have already started to work with other Senators on a legislative solution that stops pushing coal to the wayside, and instead seeks ways for coal to remain the valuable source of energy that it currently is,” she said in a statement. Her office did not name the other lawmakers.