 Though the GSC concluded that mining activities contributed to the slide , the facility 's owners disagreed . Their engineers claimed that the mine bore no responsibility . Later studies suggested that the mountain had been at a point of " equilibrium " ; even a small <unk> such as that caused by the mine 's existence would have helped trigger a slide . The mine was quickly re @-@ opened , even though rock continued to tumble down the mountain . Coal production at Frank peaked in 1910 , but the mine was permanently closed in 1917 after it became unprofitable . 
