Little Sebago Lake originally drained westerly into Sebago Lake through Boody Meadow and Outlet Brook. An artificial outlet was constructed through a moraine at the south end of Little Sebago Lake as an early 19th-century water power diversion to the Pleasant River via Ditch Brook. On 4 June 1814, the diversion became enlarged by erosion as the lake level dropped 50 feet (15 m) within a few hours, draining great quantities of water into the Pleasant River.