Modified level II streambed-scour analysis for structure I-64-83-5678 crossing Stinking Fork in Crawford County, Indiana

Level II scour evaluations follow a process in which hydrologic, hydraulic, and sediment transport data are evaluated to calculate the depth of scour that may result when a given discharge is routed through a bridge opening. The results of the modified Level II analysis for structure 1-64-83-5678 on Interstate 64 crossing Stinking Fork in Crawford County, Indiana, are presented. The site is at the town of West Fork in the southwestern part of Crawford 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 9.1 feet for the modeled discharge of 9,070 cubic feet per second and approximately 10.8 feet for the modeled discharge of 10,950 cubic feet per second.