The Red River Floodway is an artificial flood control waterway in Western Canada. It is a 47 km long channel which, during flood periods, takes part of the Red River's flow around the city of Winnipeg, Manitoba to the east and discharges it back into the Red River below the dam at Lockport. It can carry floodwater at a rate of up to 140,000 cubic feet per second…The Red River Floodway is an artificial flood control waterway in Western Canada. It is a 47 km long channel which, during flood periods, takes part of the Red River's flow around the city of Winnipeg, Manitoba to the east and discharges it back into the Red River below the dam at Lockport. It can carry floodwater at a rate of up to 140,000 cubic feet per second, expanded in the 2000s from its original channel capacity of 90,000 cubic feet per second.