The latest EFDC_Explorer Modeling System is now available, EEMS10.2 This release includes MPI for greatly improved simulation speed, a shellfish farm module, enhancements to SEDLZJ and much more. EE10 marks a major upgrade to the GUI and provides users with a start-of-the-art tool pre- and post-post processor for hydrodynamic, sediment transport and WQ modeling. Previous enhancements included vertical masks, temporally and spatially varying fields, and multi-class dye options. A free Demo version is available for download.