From abstract: The High Plains Regional Aquifer System Analysis study has developed a regional water-resources (and related) data storage and retrieval system to organize and preserve areal interpretive data. The system is general and can easily be adapted for other studies. This report documents the High Plains data base as well as the general system that is independent of the High Plains area.

From purpose and approach of study: The purpose of this study was to develop a predictive model of the ground-water system for use as a management tool. The model will be used by State and local officials in evaluating the effects of alternative methods of controlling or developing the ground-water resources of the Big Sioux aquifer in Minnehaha County.

From Purpose and Scope: "The Gillette 1º x 2º Quadrangle, Wyoming, and South Dakota was evaluated to find volumes of rock considered favorable for uranium deposits and which could contain at least at 100 mt tons U3O8 with an average grade of 0.01 percent U3O8 or more. All geologic environments to a depth of 1,500 m (5,000 ft) evaluated through the use of surface investigations and subsurface information."

Appendices containing data on uranium resources in the Gillette Quadrangle to accompany a report on U.S. uranium resources in Wyoming, South Dakota, and Montana.

Uranium resources of the Newcastle 1°x2° Quadrangle, Wyoming and South Dakota were evaluated to a depth of 1,500 m (5000 ft) using available surface and subsurface geologic information. Many of the uranium occurrences reported in the literature and in reports of the U.S. Atomic Energy Commission were located, sampled and described. Areas of anomalous radioactivity, interpreted from an aerial radiometric survey, were outlined. Areas favorable for uranium deposits in the subsurface were evaluated using gamma-ray logs. Based on surface and subsurface data, two areas have been delineated which are underlain by rocks deemed favorable as hosts for uranium deposits. One of these is underlain by rocks that contain fluvial arkosic facies in the Wasatch and Fort Union Formations of Tertiary age; the other is underlain by rocks containing fluvial quartzose sandstone facies of the Inyan Kara Group of Early Cretaceous age. Unfavorable environments characterize all rock units of Tertiary age above the Wasatch Formation, all rock units of Cretaceous age above the Inyan Kara Group, and most rock units of Mesozoic and Paleozoic age below the Inyan Kara Group. Unfavorable environments characterize all rock units of Cretaceous age above the Inyan Kara Group, and all rock units of Mesozoic and …

Appendix containing data on uranium occurrences in the Newcastle quadrangle to accompany a report on U.S. uranium resources in Wyoming and South Dakota.

Appendix containing tabulated rock sample analyses of the Newcastle quadrangle to accompany a report on U.S. uranium resources in Wyoming and South Dakota.

Appendix containing field data and chemical analyses of stream sediment samples collected from outcrop areas of the Newcastle quadrangle.

Appendix containing field data and chemical analyses of ground and surface water samples of the Newcastle quadrangle to accompany a report of U.S. uranium resources in Wyoming and South Dakota.

Appendix containing statistical summary of geochemical data from stream sediment, ground and surface water samples in the Newcastle quadrangle to accompany a report on U.S. uranium resources in Wyoming in South Dakota.

Appendix containing uranium occurrence reports in the Newcastle quadrangle to accompany a report on U.S. uranium resources in Wyoming and South Dakota.

Appendix containing data on gamma ray anomalies in oil and gas test wells to accompany a report on U.S. uranium resources in Wyoming and South Dakota.

Uranium resources of the Newcastle 1°x2° Quadrangle, Wyoming and South Dakota were evaluated to a depth of 1,500 m (5000 ft) using available surface and subsurface geologic information. Many of the uranium occurrences reported in the literature and in reports of the U.S. Atomic Energy Commission were located, sampled and described. Areas of anomalous radioactivity, interpreted from an aerial radiometric survey, were outlined. Areas favorable for uranium deposits in the subsurface were evaluated using gamma-ray logs. Based on surface and subsurface data, two areas have been delineated which are underlain by rocks deemed favorable as hosts for uranium deposits. One of these is underlain by rocks that contain fluvial arkosic facies in the Wasatch and Fort Union Formations of Tertiary age; the other is underlain by rocks containing fluvial quartzose sandstone facies of the Inyan Kara Group of Early Cretaceous age. Unfavorable environments characterize all rock units of Tertiary age above the Wasatch Formation, all rock units of Cretaceous age above the Inyan Kara Group, and most rock units of Mesozoic and Paleozoic age below the Inyan Kara Group. Unfavorable environments characterize all rock units of Cretaceous age above the Inyan Kara Group, and all rock units of Mesozoic and …

This report follows the evaluation of uranium resources in the Ekalaka 1°x 2° Quadrangle, Montana and North and South Dakota to a depth of 1,500 m (5,000 ft) using available subsurface geologic information.

The following plates depict the geology of the Ekala quadrangle in Montana, North and South Dakota.

From Introduction: "The Lemmon Quadrangle, South Dakota and North Dakota, was evaluated to identify geologic environments and delineate areas that exhibit characteristics favorable for the occurrence of uranium deposits."

Appendices containing data on uranium availability in the Lemmon Quadrangle to accompany a report on U.S. uranium resources in South and North Dakota.

From Introduction: "The Hot Springs Quadrangle covers an area of approximately 18,500 km2 and is in southwestern South Dakota and northwestern Nebraska between latitudes 43º to 44ºN. and longitudes 102º to 104ºW. (Fig. 1). The quadrangle was evaluated at the surface and in the subsurface to a depth of 1500 m to identify geologic environments and delineate areas that exhibit characteristics favorable for uranium deposits."

Appendices containing data on uranium occurrences in the Hot Springs Quadrangle to accompany a report on uranium availability in South Dakota and Nebraska.

Results of reconnaissance surveys of the Rapid City quadrangle to determine the likelihood of uranium deposits of the area, and additional information about the location and classification of any deposits.

Discussing uranium occurrences in the Rapid City Quadrangle

Discussing reported uranium occurrences not visited in the Rapid City Quadrangle

Discussing locations and analyses of samples from the Rapid City Quadrangle

Discussing petrographic reports on samples in the Rapid City Quadrangle