Geophysical and lithologic data for 12 boreholes in Raft River Valley, Idaho

In 2022, Cold Steel Mechanical, contracted by the Idaho Department of Water Resources (IDWR), drilled and constructed twelve wells in Raft River Valley, Idaho. The wells were drilled using compressed air, dual rotary methods and were fully cased to completed depths. The U.S. Geological Survey (USGS) collected groundwater level and select geophysical data at each well between November 15th and 18th, 2022. Geophysical data were collected using Century™ multi-parameter logging probes and select logs are displayed in well log figures. Select geophysical logs include natural gamma, neutron, gamma-gamma density, specific conductance, and temperature. Geophysical data shown in well log figures were collected using the natural gamma, temperature, and specific conductance probe (9042A), neutron probe (9057A), and gamma-gamma density probe (0024C). All geophysical data were collected through cased wells. For each well, the primary 9042A probe survey was conducted from the top-down and repeat 9042A surveys were performed from the bottom up after reaching total unobstructed depth. With exception to Well 4, where all surveys were performed from the top-down, geophysical data collected with the 9057A and 0024C probes were performed from the bottom-up after reaching total unobstructed depth. Geophysical logs, driller reports, and regional geology were examined synergistically to identify lithologic units and contacts. Geophysical data can be obtained by downloading the attached LAS files or using the USGS GeoLog Locator and searching by well identifier.