I thought that outside of the closed-down mines in Pennsylvania, most of the U.S. coal was bituminous.
Don't know one kind of coal from another, but it all burns.
I recently saw a picture of a wall of low sulfer coal in Wyoming that was 80 ft high on the surface. I understand that 110 trains, each with more than 100 cars filled with coal leave Power River, WY every day.
Which kind is in Utah? I remember that it was the largest field of that kind outside of Indonesia (?) before the toon federalized the land so it could not be used for mining.