Reservoir systems in Maine

The numerous lakes and ponds that are found in almost every portion of the State of Maine are important resources of the state. There are 2222 bodies of fresh water that are classed as great ponds, that is, ponds whose areas are ten acres or more, and the total area of these lakes aid ponds is about 1500 sq mi. These are a result of glaciation of the region. Some of these ponds are very deep; depths of 100 ft have been found in many lakes. In Moosehead Lake there are places where the water is 250 ft deep and in Sebago Lake as much as 315 ft. The deepest part of Sebago is 45 ft below mean sea level.