Only a few landslides have been active in historic time in the gentle slopes along River Road. Two notable slides occurred at North Bend, about 10 km downstream from Delhi Pike, and near Riverside-Harrison School, about 8.7 km upstream. The landslide at North Bend, near the William
Henry Harrison Monument, occurred during the 1970's above the outside of a bend in the river, where the slope was locally oversteepened by river erosion and loaded with a small amount of fill. The other landslide, near the Riverside-Harrison School, occurred in response to an excavation for a railroad roundhouse in 1927 and ultimately destroyed about 40 homes (Von Schlichten, 1935). Both examples demonstrate that the thick colluvium near the level of the Ohio
River will fail by landsliding if the hillslope is adversely disturbed.