The Delhi Pike landslide area is about 12 km west of downtown Cincinnati in unincorporated Hamilton County, Ohio (fig. 1). The Delhi Pike landslides are just a few of the many landslides that occur within a narrow stretch of the Ohio River Valley extending from Mill Creek to the Miami River about 22 km farther west. This stretch of the valley was created when glacial ice of Illinoian age blocked a more northern channel, creating a lake. Silts and clays deposited in the lake have been involved in major landslides in other parts of the metropolitan area. The spilling of the lake eroded the modem channel of the Ohio River (Durrell, 1961a, 1961b).