HEC-ResSim 4.0 User's Manual Release Notes ResSim Modeler FAQ Current: HEC-ResSim 4.1 Release Notes PDF Download PDF Download page HEC-ResSim 4.1 Release Notes. Current page Include child pages All pages HEC-ResSim 4.1 Release Notes ResSim 4.1 Known Issues ResSim 4.1 New or Updated ×