Modified level II streambed-scour analysis for structure I-164-7-6974 crossing Schlensker Ditch in Vanderburgh County, Indiana

Level II scour evaluations follow a process in which hydrologic, hydraulic, and sedient-transport data are evaluated to calculate the depth of scour that may result when given discharge is routed through a bridge opening. the results of the modified Levell II analysis for structure I-674-7-6974 on Interstate 164 crossing Schlensker Ditch in Vanderburgh County, Indiana, are presented. The site is near the town of Daylight  in the northwestern part of Vanderburgh County. Scour depths were computed with the Water Surface PROfile model, version V050196, which incorporates the scour-calculation procedures outlined in Hydraulic Engineering Circular No. 18. Total scour depths at the piers were approximately 176 feet for the modeled discharge of 2,100  cubic feet per second and approximately 33.4 feet for the modeled discharge of 2,940 cubic feet per second.