In 1923, two breeding pairs from Hudson Bay, Saskatchewan were brought to nearby Kenosee Lake.

The beavers flourished and soon dams were blocking not just inflow creeks to Kenosee, but to White Bear (Carlyle) Lake as well.

[3] According to aerial photographs, the surface of White Bear (Carlyle) Lake in 1928 was 737 m (2,418 ft) asl.

In 1954, four beaver dams in the area were destroyed, which helped raise lake levels.

Without continued intervention regarding dams, the lake level began to fall again and by 2008, it had dropped to 728 m (2,388 ft).