Geohydrologic and drill-hole data for test well USW H-4, Yucca Mountain, Nye County, Nevada

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Authors:Whitfield, M. S.; Thordarson, William; Eshom, E. P.
Author Affiliations:Primary:
U. S. Geol. Surv., Denver, CO, United States
Fenix and Scisson, United States
Source:Open-File Report - U. S. Geological Survey, No.OF84-0449, 69p. Publisher: U. S. Geological Survey, Reston, VA, United States. ISSN: 0196-1497
Publication Date:1984
Note:In English. 7 refs.
Summary:Data on drilling operations, lithology, geophysical well logs, sidewall-core samples, water-level monitoring, pumping tests, injection tests, radioactive-tracer borehole flow survey, and water chemistry. Southwestern part of the Nevada Test Site. Investigations to identify sites for storage of high-level radioactive wastes. Test well USW H-4 was drilled in ash-flow tuff to a total depth of 1,219 meters. Depth to water below land surface was 519 meters, or at an altitude of 730 meters above sea level. After test pumping at a rate of 17.4 liters per second for approximately 9 days, the drawdown was 4.85 meters. A radioactive borehole-flow survey indicated that the Bullfrog Member of the Crater Flat Tuff (Tertiary age) was the most productive geologic unit, producing 36.5 percent of the water in the well. The second most productive geologic unit was the Tram Member of the Crater Flat Tuff, which produced 32 percent of the water. The water in test well USW H-4 is predominantly a soft, sodium bicarbonate type of water typical of water produced in tuffaceous rocks in southern Nevada.—Modified author abstract.
Subjects:Cenozoic; Crater Flat Tuff; Drawdown; Engineering geology; Ground water; Hydrochemistry; Igneous rocks; Interpretation; Levels; Miocene; Neogene; Pyroclastics; Radioactive waste; Radioactivity; Site exploration; Surveys; Tertiary; Tuff; Underground storage; USGS; Volcanic rocks; Waste disposal; Well-logging; Nevada; Nevada Test Site; Nye County Nevada; United States; Yucca Mountain
Coordinates:N365000 N365200 W1162600 W1162700
Record ID:1985030196
Copyright Information:GeoRef, Copyright 2018 American Geosciences Institute.
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