Lawsuit seeks to close GCC Energy’s King II coal mine Durango, Colorado Currently Sat 0% chance of precipitation Conservation groups say more thorough water study will show excavation unsafe Wednesday, Dec. 16, 2020 2:07 PM Updated: Thursday, Dec. 17, 2020 10:39 PM Lawsuit seeks to close GCC Energy’s King II coal mine A lawsuit seeks to close GCC Energy’s King II mine, arguing the mine’s operation is adversely affecting water quality. Durango Herald file Toggle font size A lawsuit was filed Tuesday by conservation groups calling for GCC Energy’s King II coal mine to comply with a stricter water protection rule, a move the groups say will lead to the closure of the mine in western La Plata County.