From the International Lake Superior Board of Control and U.S. Army Corps of Engineers:
The monthly mean water level of Lake Superior in February was 183.47 m (601.94 ft). This is 21 cm (8 in) above the long-term (1918-2013) February average and the highest February level since 1997.
The net water supplies to Lake Superior were below average in February. The level of Lake Superior declined 7 cm (3 in) last month, while on average the lake declines 5 cm (2 in) in February. The Lake Superior level at the beginning-of-March is 19 cm (7 in) above average, 19 cm (7 in) above the level recorded a year ago at this time, and 23 cm (9 in) above its chart datum level.