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<br />"'%::1 IV <br /> <br />Colorado", \~as released to the open-file on <br />January lB. It may be inspected at the <br />offices of the U.S.G.S. in the Villa Italia <br />Shopping Center or the Public Inquiries office <br />of the Survey in the Denver Federal Building. <br />A copy is also available for inspection in <br />the Colorado Water Conservation Board offices. <br /> <br />A report on Ground Water Development in <br />the Colorado High plains, has been released <br />to the open files and it may be inspected in <br />the same offices as the previous report. <br /> <br />preliminary map of the conterminous United <br />States showing depth to and quality of the <br />shallowest ground water containing more than <br />1,000 parts per million of dissolved solids <br />is available from the Public Inquiries Office <br />in the Denver Federal Building or the Map <br />Distribution Office in Building 25 at the <br />Denver Federal Center. This map was put out <br />in connection with the interest in saline <br />waters where the mineral content wasn't so <br />high but what they might lend themselves to <br />treatment to provide fresh water. <br /> <br />A primer on water quality is also avail- <br />able and this is just a special publication <br />that is available through the Public Inquiries <br />Office. <br /> <br />A paper by Ted Hurr and Dave Richards, <br />"Ground-Hater Engineering of the straight Creek <br />Tunnel (pilot Bore), Colorado" \~as presented <br />at the National Convention of the Association <br />of Engineering Geologists at Denver in October. <br />This was a study that was made in connection <br />with the water problems in Straight Creek <br />Tunnel. <br /> <br />A paper by John Moore and Leonard Wood, <br />"Analog-r.lodel Evaluation of the Arkansas <br />River valley in Eastern Colorado" was pre- <br />sented at the annual meeting of the Geological <br />Society of America in Kansas city last November. <br /> <br />I <br /> <br />I <br />