Fall Facts: Average yearly flow is approximately 50,000 gallons per minute - enough water to supply all the water needs of the Eugene/Springfield area, which has a population of about 150,000 people. Peak water flow in the wintertime is twice the average yearly flow. At average flow, the falling water develops about 910 horsepower or enough kilowatts to meet the electrical needs of about 365 households. It takes about 4 seconds for the interior of the water column to fall 286 feet to the bse of the falls. Water force at the bottom of the falls is equivalent to two fuill-size cars crashing to the earth at 46 miles per hour every second, forever.