Wyoming regulators give green light to new coal mine New Wyoming coal mine gets green light from state regulators and last updated 2020-12-22 15:06:28-05 The first new coal mine in Wyoming in nearly a half century will be allowed to move forward. The Wyoming Department of Environmental Quality last week approved a permit extension for the Brook Mine, paving the way for Ramaco Carbon to begin digging coal. Ramaco Carbon plans to use coal from its 15,000-acre surface mine near Sheridan to develop alternative uses for coal, such as carbon fiber and carbon building products. The Powder River Basin Resource Council appealed the state's decision, arguing that the company's proposal lacked a traffic and subsidence control plan and did not comply with federal requirements.