Äshèyi people would come here to collect shale to make stone scrapers, knives and other tools. The source of this rock is a bluff on the the northwest shore.

Some Äshèyi people would also pass along Tthechằl Mǟn on their seasonal round which took them on a loop through Sakay Chù and Tthe Yì Chù, Albert and Isaac Creeks. Their activity was mostly concentrated in the area north of Tthe Yì Chù. Tthechằl Mǟn is a deep cold lake. Huge kwätsų (ling cod), 25-30 pounds in size have been taken here. Äshèyi people still set nets and get mbet (trout), łu (whitefish), and kwätsų (ling cod). The blueberries are especially good here. Sheep and caribou are found in the hills. The area is used for trapping in the winter.