This investigation was concerned with the development of plans for a stone control structure in Six Mile Lake to maintain a flow distribution of 70 percent down the Atchafalaya River toward Morgan City, LA, and 30 percent down Six Mile Lake to the Wax Lake Outlet channel for nonflood periods, less than 550,000 cfs Atchafalaya Basin discharge. The study indicated that the desired flow distribution could be obtained with a stone structure in Six Mile Lake connected to the West and South Protection Levees by earthen overflow levees. This structure produced flow distributions ranging from 27 percent at the lower flows to about 35 percent for flows near 550,000 cfs. Velocities ranged from about 12 fps in the notch to 9 fps 1,000 ft below the axis of the structure. This was the nearest to the desired 7-30 percent distribution with the lowest velocities of all plans tested.
