What is the rate of erosion for the Niagara Falls?

The rate of erosion for Niagara falls is approximately 3 to 4 feet per year. This erosion is primarily caused by the powerful flow of water and the natural processes of weathering and erosion acting on the rock formations. Over thousands of years, this has led to the retreat of the falls from its original location. Efforts have been made to manage and mitigate erosion to preserve the falls' iconic beauty and stability.