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The "exclusive" or elusive nature of this download is due to a major shift in software development at the U.S. Army Corps of Engineers:
Attention hydrologic modelers and GIS professionals! If you're working with and need to build HEC-HMS models from geospatial data, HEC-GeoHMS is your essential toolkit.
HEC-GeoHMS (Hydrologic Engineering Centers River Analysis System - Geo-based Hydrologic Modeling System) is a geospatial hydrologic modeling software used for simulating and analyzing watershed behavior. It is an extension for ArcGIS, a popular Geographic Information System (GIS) software. This report provides a step-by-step guide on downloading HEC-GeoHMS for ArcGIS 10.8 exclusively.
