Geohydrologic data for test well USW G-4, Yucca Mountain area, Nye County, Nevada
This report presents data on drilling operations, lithology, borehole geophysics, hydrologic monitoring, core analysis, water chemistry, pumping tests, and packer-injection tests for test well USW G-4. The well is one of a series of test wells drilled in and near the southwestern part of the Nevada Test Site, Nye County, Nevada, in cooperation with the US Department of Energy. These test wells are part of the Nevada Nuclear Waste Storage Investigations to identify suitable sites for underground storage of high-level radioactive wastes. Test well USW G-4 was drilled to a total depth of 915 meters through volcanic rocks, consisting mostly of ash-flow tuff. Depth of water in the well during drilling and testing ranged from 538 to 544 meters below land surface. Static water level after completion of drilling was at an approximate altitude of 730 meters above sea level. Drawdown in the well was about 3 meters after test pumping more than 5000 minutes at a rate of 16 liters per second. A borehole-flow survey indicated that almost all water withdrawn from the well was contributed by the zone between a depth of about 865 and 915 meters below land surface. A composite water sample collected after well completion contained 216 milligrams per liter of dissolved solids, with relatively large concentrations of silica, sodium, and bicarbonate. 6 references, 21 figures, 6 tables.
- Research Organization:
- Geological Survey, Denver, CO (United States)
- DOE Contract Number:
- AI08-78ET44802
- OSTI ID:
- 59694
- Report Number(s):
- USGS-OFR--84-063; ON: DE84010085
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHEMICAL COMPOSITION
DEPTH
DRILL CORES
EXPERIMENTAL DATA
GEOLOGIC DEPOSITS
GEOLOGY
GEOPHYSICAL SURVEYS
GROUND WATER
HIGH-LEVEL RADIOACTIVE WASTES
HYDROLOGY
LITHOLOGY
NEVADA TEST SITE
RADIOACTIVE WASTE STORAGE
SITE SELECTION
TUFF
UNDERGROUND STORAGE
WATER CHEMISTRY
WELL DRILLING
WELL LOGGING
Yucca Mountain Project