HEC-GeoEFM Release Notes for ArcGIS 10.x Current: Documentation and HEC-EFM Status PDF Download PDF Download page Documentation and HEC-EFM Status. Current page All pages Documentation and HEC-EFM Status The User’s Manual was updated to include descriptions of new features (sections added or revised: 5.3, 5.4, 5.5, 5.6, 5.7, and 5.8).Information is passed from EFM to GeoEFM for use in GeoEFM applications. No changes were made to EFM in support of GeoEFM 2.0. The latest version of EFM (5.0) and corresponding release notes are available via HEC’s website. ×