HEC-6T Red/Atchafalaya River Numerical Sedimentation Model Investigation The basic issue of this study was the long-term prediction of stages in the basin.   St. Francis River Sedimentation Study This was a HEC-6T sedimentation analysis to predict long-term erosion and deposition along the St. Francis River Channel.   Grade Control for Channel Restoration We have done projects involving both the inspection of existing grade control structures and the planning of new ones. Copyright © 2002 Mobile Boundary Hydraulics, PLLC