Geohydrology of Test Well USW H-3, Yucca Mountain, Nye County, Nevada
Test well USW H-3 is one of several test wells drilled in the southwestern part of the Nevada Test Site in cooperation with the US Department of Energy for investigations related to the isolation of high-level radioactive wastes. All rocks penetrated by the well to a total depth of 1219 meters are volcanic tuff of Tertiary age. The composite hydraulic head in the zone 751 to 1219 meters was 733 meters above sea level, and at a depth below land surface of 751 meters. Below a depth of 1190 meters, the hydraulic head was 754 meters above sea level or higher, suggesting an upward component of groundwater flow at the site. The most transmissive part of the saturated zone is in the upper part of the Tram Member of the Crater Flat Tuff in the depth interval from 809 to 841 meters, with an apparent transmissivity of about 7 x 10{sup -1} meter squared per day. The remainder of the penetrated rocks in the saturated zone, 841 to 1219 meters, has an apparent transmissivity of about 4 x 10{sup -1} meter squared per day. The most transmissive part of the lower depth interval is in the bedded tuff and Lithic Ridge Tuff, in the depth interval from 1108 to 1120 meters. The apparent hydraulic conductivity of the rocks in the lower depth interval from 841 to 1219 meters commonly ranges from about 10{sup -1} to 10{sup -4} meter per day. 32 references, 20 figures, 4 tables.
- Research Organization:
- Geological Survey, Lakewood, CO (United States)
- DOE Contract Number:
- AI08-78ET44802
- OSTI ID:
- 59224
- Report Number(s):
- USGS/WRI--84-4272; ON: DE85009134
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
58 GEOSCIENCES
BOREHOLES
DRAWDOWN
EXPERIMENTAL DATA
EXPLORATORY WELLS
GEOLOGIC DEPOSITS
GROUND WATER
HIGH-LEVEL RADIOACTIVE WASTES
HYDRAULIC CONDUCTIVITY
HYDROLOGY
LITHOLOGY
PUMPING
RADIOACTIVE WASTE DISPOSAL
STRATIGRAPHY
TUFF
UNDERGROUND DISPOSAL
WELL LOGGING
YUCCA MOUNTAIN
Yucca Mountain Project