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 Steady HEC-RAS (2023) 1D Unsteady Flow 2D Unsteady Flow (2024) 2D Unsteady Flow (2021) 2D Sediment Transport 2D Sediment Transport (2024) 2D Sediment Transport (2022) 2D Sediment Transport (2021) H&H for Dam Safety Studies Terms of Use Any use or reproduction of this material must be attributed to the US Army Corps of Engineers Hydrologic Engineering Center. ×