HEC-RAS User's Manual Hydraulic Design (HD) Calculators Riprap and Scour Calculator Current: Ongoing Work and Wish List PDF Download PDF Download page Ongoing Work and Wish List. Current page All pages Ongoing Work and Wish List HEC is working on the following developments for future versions: Add the Maricopa County Riprap Design ApproachAdd the Blench Scour CalculationAutomatically read bankfull hydraulics for Neill equation by selecting a second HEC-RAS profileAutomate the Radius of Curvature Calculation in RASMapperImport Cross-Section Averaged 2D Results Directly from a User Selected Transect ×