Every night hydro generating stations begin drawing allowed water diversion
reducing the rate of water flow over the Falls to 50% of the
normal rate of flow. As a result of this reduced volume of water flow
(less than 62,000 cubic feet per second), the currents in the Whirlpool reverse
direction to clockwise. As the water now enters the Whirlpool it follows the contour
of the circular edge of Whirlpool rotating clockwise and exits through the
northern channel towards Lake Ontario. The depth of the Whirlpool is 125 feet (38m).
The width of the Whirlpool is approximately 1,650 feet (502m) in diameter.