PDF Download PDF Download page Summer 2026. Current page Include child pages All pages Summer 2026 In This Issue Director's Comments 2026 HEC-HMS Version 4.13 SnowPAC in HEC-HMS, Streamlining ATI-Meltrate Development for Temperature Index Snowmelt Modeling Advancing Hydrologic Modeling with Machine Learning Methods: From Parameter Estimation to Forecasting Improving Mixed Populations Flood Frequency Analysis HEC-RAS Updates Getting River Bends Right - 2D Secondary Flows in HEC-RAS New Two-Dimensional (2D) Bridge Scour Tool in HEC-RAS HEC-ResSim Version 4.0 - A Modern ResSim HEC-ResSim Version 4.0, New Water Quality Feature Sunset for HEC-DSS Version 6 CWMS Value Added HEC Return on Investment Fiscal Year 2027 PROSPECT Training Program HEC Staff Changes Since Fall 2024 Newsletter ×