HEC-RAS Training Current: HEC-RAS Classes PDF Download PDF Download page HEC-RAS Classes. Current page Include child pages All pages HEC-RAS Classes 1D Unsteady Flow 2D Unsteady Flow H&H for Dam Safety Studies H&H for Dam Safety Studies (2024) 2D Sediment Transport 2D Sediment Transport (2024) 2D Sediment Transport (2022) 2D Sediment Transport (2021) Terms of Use Any use or reproduction of this material must be attributed to the US Army Corps of Engineers Hydrologic Engineering Center. ×