Map of the Alluvial Valley of the Mississippi River

From Helena[,] Arkansas to the Gulf of Mexico to Accompany a Plan for Flood Relief to the Lower Valley Based upon Lower Flood Levels to be Brought about by the Aid of Spillways Into the Tensas and Atchafalaya Basins and an Increased Discharge through the Atchafalaya River Past Morgan City to the Gulf[.] This Proposed Plan has been conceived and developed under the Auspices of The Safe River Committee of One Hundred