The rapid flow of the Niagara River just before the crest of the falls is 20 miles per hour.
Combine this with the 75,750 gallons of water falling per second over the American and Bridal Veil Falls, and the 681,750 gallons per second falling over the Horseshoe Falls (Canadian side) and the results are:
Enough force to provide electricity to 3.8 million homes including the City of Buffalo New York and Toronto Ontario.
Hydroelectric power