The October 1986 flood of the Cimarron River resulted in severe scour around piers of eight overflow structures of the 1-35 bridge. A major portion of the flood passed through these structures resulting in a high velocity of flow. Furthermore, the bridge is located on a meander, and that leads to a skewed, flow in the flood plain. This fact caused additiona scour around the piers. The scour was measured using the Electronic Distance Meter. After th?? flood receded, the maximum depth of scour ranged from IO feet to 30 feet.