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<br />~.' <br /> <br />~_ ,.4 <br /> <br /> <br /> <br />. ~- <br /> <br />~"'''i<:l1 f.'''' <br />v~, <.;1.,*14 "~~ <br /> <br />METHODS OF STUDY <br /> <br />Information in this report is based on data collected from'16 <br /> <br />test holes. The work at the Field Station consisted of: (1) auger!ng <br /> <br />+ <br /> <br />test holes, (2) collecting and describing core samples from selected <br /> <br />intervals, (~) installation of observation wells to measure moisture <br /> <br />content and water level, (4) geophysical logging (gamma-ray, neutron- <br /> <br />moisture, and gamma-gamma-density), (5) laboratory determinations of <br /> <br />the moisture 'content of the core samples, and (6) inst?llation of a <br /> <br />well to measure the air permeability at three depths. ,.- <br /> <br />.---'.,... ,- -~. .~.-- <br /> <br />Sixteen test holes were drilled with a truck-mounted, ho110w- <br /> <br />stem auger o~ed and operated by the U.S. Geological Survey. The <br /> <br />test holes ranged ~n depth from 51.5 to 98.5 feet, andthetatal- <br /> <br />. <br /> <br />footage drilled was 1,255 feet. All test holes, except test hole 4, <br /> <br />, <br />fully penetrated the Ogallala Formation (table 1). Observation well <br /> <br />"numbers used: in- tab lel: are -based 'on the' 'Bureau:,6rLand::Manl'genient",,~, ' <br /> <br />sy,stem of land subdivision and are also identified byalocal (U. S., <br /> <br />Department of Agriculture) well number. An explanation of-the Bureau ' <br /> <br />.. <br /> <br />of Land ManaSementsystem of numbering wells is given in U.S. Ge'010gica1 <br /> <br />Survey Water~Supply Paper 1777 (McGovern, 1964). <br /> <br />L: <br />_.ii-il <br /> <br />_ .~_i;",,,,,~,,-s~:~. <br /> <br />_-.,~:..<_ .'J'..J :',<';",.~:-;;; <br />