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July 1993 -11- 923-2515 <br />The flat azea at the confluence of Grassy Creek and the Yampa River has been mapped as <br />alluvium. <br />3.5 mm <br />The geologic properties of several drainage systems in the vicinity of the Yoast Mine Property <br />have been characterized by inspection of aerial photographs and by various field verification <br />tasks: <br />These drainages aze characterized as being comprised of azeas of undifferentiated valley fill with <br />isolated areas of alluvium. The drainage sideslopes are typically comprised of colluvium with <br />occasional alluvial fan deposits. Small and limited areas of anthropogenic fill occur within the <br />drainages. In addition, one inactive landslide is present in the study azea. <br />• <br /> <br />Golder Associates <br />