Recent characterization activities of Midway Valley as a potential repository surface facility site

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Midway Valley, located at the eastern base of Yucca Mountain, Nye County, Nevada, has been identified as a possible location for the surface facilities of a potential high-level nuclear-waste repository. This structural and topographic valley is bounded by two north- trending, down-to-the-west normal faults: the Paintbrush Canyon fault on the east and the Bow Ridge fault on the west. Surface and near-surface geological data have been acquired from Midway Valley during the past three years with particular emphasis on evaluating the existence of Quaternary faults. A detailed (1:6000) surficial geological map has been prepared based on interpretation of new and ... continued below

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20 p.

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Gibson, J.D.; Wesling, J.R.; Swan, F.H. & Bullard, T.F. January 31, 1992.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Midway Valley, located at the eastern base of Yucca Mountain, Nye County, Nevada, has been identified as a possible location for the surface facilities of a potential high-level nuclear-waste repository. This structural and topographic valley is bounded by two north- trending, down-to-the-west normal faults: the Paintbrush Canyon fault on the east and the Bow Ridge fault on the west. Surface and near-surface geological data have been acquired from Midway Valley during the past three years with particular emphasis on evaluating the existence of Quaternary faults. A detailed (1:6000) surficial geological map has been prepared based on interpretation of new and existing aerial photographs, field mapping, soil pits, and trenches. No evidence was found that would indicate displacement of these surficial deposits along previously unrecognized faults. However, given the low rates of Quaternary faulting and the extensive areas that are covered by late Pleistocene to Holocene deposits south of Sever Wash, Quaternary faulting between known faults cannot be precluded based on surface evidence alone. Middle to late Pleistocene alluvial fan deposits (Unit Q3) exist at or near the surface throughout Midway Valley. Confidence is increased that the potential for surface fault rupture in Midway Valley can be assessed by excavations that expose the deposits and soils associated with Unit Q3 or older units (middle Pleistocene or earlier).

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20 p.

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INIS; OSTI as DE92011382

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  • Waste management `92, Tucson, AZ (United States), 1-5 Mar 1992

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  • Other: DE92011382
  • Report No.: SAND--92-0091C
  • Report No.: CONF-920307--67
  • Grant Number: AC04-76DP00789
  • Office of Scientific & Technical Information Report Number: 138393
  • Archival Resource Key: ark:/67531/metadc621591

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  • January 31, 1992

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • April 14, 2016, 6:40 p.m.

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Gibson, J.D.; Wesling, J.R.; Swan, F.H. & Bullard, T.F. Recent characterization activities of Midway Valley as a potential repository surface facility site, article, January 31, 1992; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc621591/: accessed October 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.