The ground—water level data presented in this report were collected in conjunction with a study of the Mississippi River Valley alluvial aquifer in part of the Yazoo River Basin. Funding for the collection of water—level data was provided by the Vicksburg District, Corps of Engineers, who also drilled the observation wells and surveyed elevations of the top of the casing of each well. The wells were drilled to obtain data on seasonal changes in ground—water levels, areas of recharge and/or discharge, and on direction of movement of water in the alluvial aquifer. This report is intended to document the data.