Preliminary hydrogeologic assessment of boreholes UE-25c No. 1, UE-25c No. 2, and UE-25c No. 3, Yucca Mountain, Nye County, Nevada

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The purpose of this report is to characterize-the hydrogeology of saturated tuffaceous rocks penetrated by boreholes UE-25c {number_sign}1, UE-25c {number_sign}2, and UE-25c {number_sign}3. These boreholes are referred to collectively in this report as the C-holes. The C-holes were drilled to perform multiwell aquifer tests and tracer tests; they comprise the only complex of closely spaced boreholes completed in the saturated zone at Yucca Mountain. Results of lithologic and geophysical logging, fracture analyses, water-level monitoring, temperature and tracejector surveys aquifer tests, and hydrochemical sampling completed at the C-hole complex as of 1986 are assessed with respect to the regional geologic and ... continued below

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92 p.

Creation Information

Geldon, A.L. December 31, 1993.

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Description

The purpose of this report is to characterize-the hydrogeology of saturated tuffaceous rocks penetrated by boreholes UE-25c {number_sign}1, UE-25c {number_sign}2, and UE-25c {number_sign}3. These boreholes are referred to collectively in this report as the C-holes. The C-holes were drilled to perform multiwell aquifer tests and tracer tests; they comprise the only complex of closely spaced boreholes completed in the saturated zone at Yucca Mountain. Results of lithologic and geophysical logging, fracture analyses, water-level monitoring, temperature and tracejector surveys aquifer tests, and hydrochemical sampling completed at the C-hole complex as of 1986 are assessed with respect to the regional geologic and hydrologic setting. A conceptual hydrogeological model of the Yucca Mountain area is presented to provide a context for quantitatively evaluating hydrologic tests performed at the C-hole complex as of 1985, for planning and interpreting additional hydrologic tests at the C-hole complex, and for possibly re-evaluating hydrologic tests in boreholes other than the C-holes.

Physical Description

92 p.

Notes

U.S. Geological Survey, Earth Science Information Center, Open File Reports Section, Box 25286, MS 517, Federal Center, Denver, CO 80225; OSTI as DE95003785

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  • Other Information: PBD: 1993

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  • Other: DE95003785
  • Report No.: USGS/WRI--92-4016
  • Grant Number: AI08-92NV10874
  • DOI: 10.2172/60830 | External Link
  • Office of Scientific & Technical Information Report Number: 60830
  • Archival Resource Key: ark:/67531/metadc694612

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  • December 31, 1993

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  • Aug. 14, 2015, 8:43 a.m.

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  • April 18, 2016, 6:47 p.m.

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Geldon, A.L. Preliminary hydrogeologic assessment of boreholes UE-25c No. 1, UE-25c No. 2, and UE-25c No. 3, Yucca Mountain, Nye County, Nevada, report, December 31, 1993; Denver, Colorado. (digital.library.unt.edu/ark:/67531/metadc694612/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.