The Lake Wayagamac discharges at the north-west side into Little Bostonnais River which has an approximate length of 10.6 km (measured on water) between the dam of Lake Wayagamac and its mouth.
The Lake Wayagamac discharges at the north-west side (at the bottom of a bay) where a dam was built. The lake drains into Little Bostonnais River which has an approximate length of 10.6 km (measured on water) between the dam of Lake Wayagamac and its mouth.