Lake Superior is the largest fresh-water lake in the world and is the most northwester1y lake of the Great Lakes of North America. It is bounded on the east and north by the Provdince of Ontario, on the west by the State of Minnesota, and to the south by Wisconsin and Michigan. Lake Superior is characterized by deep water, high bluffs, and a rocky shore along a large portion of its coast. It is the deepest of the Great Lakes, having depth of 1333 feet. Its shape is roughly that of a wide crescent covex toward the north. The maximum distance follows the curve of its axis from west to east and is about 383 miles in length. The extreme width is approximately 160 miles. Lake Superior has a mean elevation of 602 feet above sea level and is approximately 21 feet higher than Lake Michigan and Lake Huron.