This report presents results and analysis of hydrogeologic, geophysical, groundwater-monitoring, and hydrochemical studies and aquifer tests by the Utah Geological Survey (UGS) in Snake Valley, Tule Valley, and Fish Springs Flat, Millard and Juab Counties, west-central Utah. The primary objectives of this work were to (1) establish a new groundwater-monitoring network to improve data on baseline groundwater-level, spring-flow, and hydrochemical conditions, (2) measure the impacts of current and proposed future groundwater pumping on these baseline conditions, (3) improve understanding of geologic controls on groundwater flow in the study area, and (4) integrate the results to test previously proposed conceptual models of groundwater flow.