Niagara Falls is the largest water fall in North America by volume. Which water fall is second in volume to Niagara Falls ?
Willamette Falls, Oregon City, Oregon.
This is the second largest water fall by volume in North America. Willamette Falls was the site of the first hydro electrical power grid in the World. The falls provided the transmission of electricity for Portland Oregon beginning on June 3, 1889.
More Info:
www.rediscoverthefalls.com