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The U.S. Army Corps of Engineers' Hydrologic Engineering Center Data Storage System, or HEC-DSS, is a database system designed to efficiently store and retrieve scientific data that is typically sequential. Such data types include, but are not limited to, time series data, curve data, spatial-oriented gridded data, and others. The system was designed to make it easy for users and application programs to retrieve and store data. HEC-DSS is incorporated into most of HEC’s major application programs.

Data in HEC-DSS database files can be graphed, tabulated, edited and manipulated with HEC-DSSVue, a Java-based visual utilities program. HEC-DSSVue is supported for Microsoft Windows 98/ME/NT/2000/XP/Vista/7, Sun Solaris SPARC, and Linux.

HEC-DSS Utility programs provide “batch” type data entry capabilities from a variety of formats, report generation with HEC-DSS data, as well as legacy applications whose functionality has been superseded by HEC-DSSVue.