Modified level II streambed-scour analysis for structure I-65-120-6016 crossing Little Eagle Creek and I-65 in Marion 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-65-120-6016 on Georgetown Road crossing Little Eagle Creek and 1-65 in Marion County, Indiana, are presented. The site is in the city of Indianapolis in the northwestern part of Marion 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 5.2 feet for the modeled discharge of 3,450  cubic feet per second and approximately 5.6 feet for the modeled discharge of 5,210 cubic feet per second.