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Welcome to the U.S. Army Corps of Engineers (USACE), Hydrologic Engineering Center's (HEC) Statistical Software Package (HEC-SSP). This software allows users to perform statistical analyses of hydrologic data. The current version of HEC-SSP can perform flood flow frequency analysis based on Bulletin 17B (Interagency
Advisory Committee on Water Data, 1982) and Bulletin 17C (England, et al., 2015), a generalized frequency analysis on not only flow data but other hydrologic data as well, a volume frequency analysis on high and low
flows, a duration analysis, a coincident frequency analysis, and a balanced hydrograph analysis.