what is the deepest part of lake erie
1 The lake fluctuates from month to month with the highest lake levels in October and November. 2  The normal high-water mark is 2.00 feet (0.61 m) above datum (569.2 ft or 173.5 m). 3  In the summer of 1986, Lake Erie reached its highest level at 5.08 feet (1.55 m) above datum.