Geology and ground-water resources of Uvalde and Medina Counties, Texas

This report is based on an investigation by the United States Geological Survey, the Texas State Board of Water Engineers, and the Texas State Board of Health to determine the ground-water resources of Uvalde and Medina Counties, especially in relation to irrigation, both in these counties and in the counties to the south where water is obtained for irrigation from the Carrizo sand and younger formations. This investigation was carried on between September 12, 1928, and May 25, 1930. Observations of the water levels in selected wells were made at intervals up to August 1935.