Introduction: The alluvial deposits form the principal aquifer in the Owl Creek Valley and the source of water to many stock and domestic wells and to a few irrigation wells. In 1975, the U.S. Geological Survey, in cooperation with the Wyoming State Engineer, began an investigation of the hydrology and geology, including the geomorphology, of Owl Creek Valley (fig. 1) to determine possible favorable areas for obtaining ground water of adequate chemical quality for irrigation and other uses. The part of Owl Creek basin investigated is downstream from Anchor Reservoir and includes North Fork, South Fork, and the mainstem of Owl Creek (pi. 1). However, the area downstream from Embar Ranch (pi. 1) was emphasized during the study.

From Introduction Purpose and Scope: "The Arminto 1º x 2º quadrangle, in central Wyoming (Fig. 1), was evaluated to identify geologic environments that exhibit characteristics favorable for uranium deposition. Evaluation, consisting of three separate and distinct phases, started in October 1978 and ended in March 1980. It must be emphasized that this report is meant to be a preliminary reconnaissance-type study to identify favorable environments, as defined above."

Appendices containing data on uranium availability in the Arminto Quadrangle to accompany a report on U.S. uranium resources in Wyoming.

From Introduction: "The Sheridan NTMS 1º by 2º Quadrangle (Fig. 1) in north-central Wyoming was evaluated to identify geologic environments that have characteristics favorable for uranium deposition. Only environments to a depth of 1500 m have been evaluated for this project."

Appendices containing supplementary data on uranium availability in the Sheridan Quadrangle, in addition to petrology reports and test well reports to accompany a report on U.S. uranium reports in Wyoming and Montana.

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."

Abstract: This report lists the machine-readable data files developed for the Madison Limestone and Northern Great Plains Regional Aquifer System Analysis (RASA) projects that are stored on magnetic tape and available from the U.S. Geological Survey. Record format, file content, and size are given for: (1) Drill-stem-test data for Paleozoic and Mesozoic formations; (2) geologic data from the Madison Limestone project; (3) data sets used in the regional simulation model; (4) hydraulic-head data for the Lower and Upper Cretaceous aquifers; and (5) geologic data for Mesozoic formations of the Northern Great Plains.

From Introduction: "The Rawlins Quadrangle (2º) is in south-central Wyoming and extreme northwest Colorado (Fig. 1). Evaluation of the quadrangle was conducted to identify and delineate areas that contain environments exhibiting characteristics common to known uranium-bearing environments."

Appendices containing data on uranium occurrences in the Rawlins Quadrangle in addition to emission spectroscopy results, electric and gamma-ray logs, lithologic logs and petrology reports to accompany a report on U.S. uranium resources in Wyoming and Colorado.

From Introduction: "The Cody NTMS Quadrangle, Wyoming, was evaluated to identify and delineate environments, rock units, and geographic areas that exhibit characteristics favorable for the occurrence of uranium deposits."

Appendices containing data on uranium availability in the Cody Quadrangle to accompany a report on U.S. uranium resources in Wyoming.

From Introduction: "The Richfield 1º x 2º Quadrangle (Fig. 1), Utah, was evaluated to identify and delineate areas and geologic areas and geologic units that exhibit characteristics favorable for the occurrence of uranium deposits. A favorable area or environment, according to the specifications used in this study, is one that is known or is likely to have uranium deposits containing a minimum of 100 tons of U3O8 with an average grade of not less than 100 ppm U3O8."

From Introduction: "The Lander Quadrangle, Wyoming (Fig. 1), was evaluated to identify geologic environments and delineate areas that exhibit characteristics favorable for the occurrence of uranium deposits. Favorable areas are those that are capable of containing uranium deposit of at least 100 tons of U3O8 in rocks with a minimum average ore grade of 0.01%."

Appendices containing supplementary data on uranium occurrences in the Lander Quadrangle in addition to a table of chemical analyses, a well list, and petrology reports to accompany a report on U.S. uranium resources in Wyoming.

From Introduction: "The Casper NTMS 1º x 2º Quadrangle, Wyoming (Fig. 1), was evaluated to identify and delineate areas and geologic units that exhibit characteristics favorable for the occurrence of uranium deposits. Formation and environments were evaluated for uranium favorability to a depth of 1500 m by surface and subsurface studies."

Appendices containing data on uranium availability in the Casper Quadrangle to accompany a report on U.S. uranium resources in Wyoming.

Appendices containing data on uranium availability in the Torrington Quadrangle to accompany a report on U.S. uranium resources in Wyoming and Nebraska.

From Introduction: "The Thermopolis Quadrangle (1º x 2º), Wyoming, was evaluated to identify and delineate areas and geologic units that exhibit characteristics favorable for the occurrence of uranium deposits. Geologic environments and formations were evaluated to a depth of 1500 m from surface and subsurface investigations. Areas and environments were categorized as favorable, unfavorable, or unevaluated for uranium deposits."

Appendices containing data on uranium availability in the Thermopolis Quadrangle to accompany a report on U.S. uranium resources in Wyoming.

Abstract: A study was conducted for the resolution of sediment source areas in the Big Sandy River basin, southwestern Wyoming. Suspended-sediment and bedload data were collected in order to determine total sediment transport at several locations within the basin. The bedload data were compared to the Einstein bedload function and total load data were compared to the Colby method. The bedload comparison showed a higher estimation of transport rates with Helley-Smith sampler measurements than with the Einstein beadload function. The Colby method yielded higher transport rates at high flows and lower transport rates at low flows than the measured total transport rate. The Big Sandy reservoir acts as a control in the basin. The area upstream of the reservoir was interpreted separately from the area downstream for source-area determination. In the arid plains upstream of the reservoir, the amount of sediment transported increased 98 percent with an increase in runoff of only 1 percent.

From introduction: One purpose of this study was to describe streamflows of the Green River and its tributaries. In addition to describing the cause and occurrence of streamflows in the study area, a brief discussion of how streamflow data are collected and summarized is presented as background information to users of this report who may be unfamiliar with streamflow measurement. The second and primary purpose of this study was to describe hydraulic characteristics of streams in the study area.

From purpose and scope: The study on which this report is based began during 1975 in cooperation with the U.S. Bureau of Land Management as part of their Energy Mineral Rehabilitation Inventory and Analysis program. The study was directed toward determining hydrologic processes and their relation to other aspects of the environment in the Salt Wells Creek basin, and how this knowledge might be used in planning for the strip mining of coal.

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.

Appendices containing data on uranium occurrences in the Richfield Quadrangle to accompany a report on U.S. uranium resources in Utah.