Modified level II streambed-scour analysis for structure I-64-108-5658 crossing Indian Creek in Harrison 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-64-108-5658 on Interstate 64 crossing Indian Creek in Harrison County, Indiana, are presented. The site is near the town of Corydon in the central part of Harrison 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 6.6 feet for the modeled discharge of 26,000 cubic feet per second and approximately 8.0 feet for the modeled discharge of 34,000 cubic feet per second.