Availability of Ground Water in Hall County, Nebraska (HA-131): Keech, C. F., Dreeszen, V. H. (1:125,000; 1964). Size 42" x 48". Descripiton: The following black and white figures appear on this sheet: 1) Generalized Soil Map of Hall County; 2) Geologic Sections Across Hall County; 3) Map of Hall County showing Eastern Boundary of the Ogallala Formation, Areal Distribution and Configuration of Rocks of Cretaceous Age; 4) Water Table Map of Hall County; 5) Map showing Availability of Ground Water in Rocks of Tertiary and Pleistocene Age and Location of Irrigation Wells. Additional text is included. Large sheet is folded in accompanying manila envelope.