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4 ~.., ,.:,~:~.~L. <br />cowro.anrwr~ <br />• <br />•) <br />•, <br />3.0 PROCEDURES <br />The following sections describe well siting, well con- <br />struction, and water-level measurement procedures. <br />3.1 Well Site Locatio <br />Three wells were constructed at each of *_he well sites <br />identified on Figure 3-1 as GBB (Big Bottom site), GF (northern <br />mine site), and GZ (southern mine site). Figure 3-2 shows plan <br />views of each well site. <br />Well site GBB is located approximately 600 feet from <br />the Yampa River. The well site is adjacent to a segment of the <br />river where a loss of flow from the river to ground water was <br />identified during flow studies of the Yampa River conducted by <br />Radian in August, 1978. <br />Well sites GF and GZ are Located approximately 6,400 <br />feet apart on a north-south line. '.dell site GF is slightly <br />north (downdip) of the area to be mined. Well site GZ is ap- <br />proximately in the center of the area to be mined. Well sites <br />GF and GZ were located to provide water-level data along a dip <br />section on the southern flank of the Big Bottom Syncline. <br />3.2 Well Construction <br />Nine piezometer wells were constructed by Lyster <br />Drilling, Inc., of Craig, Colorado. All well construction was <br />supervised in the field by Terry Settergren, Radian Corporation <br />hydrogeologist. Three piezometer caells were constructed at each <br />of two sites (GF and GBB) during the period of 13 November 1978 <br />to 22 December 1978. Three additional piezometer wells were <br />constructed at site GZ from 22 January 1979 to 1 February 1979. <br />3-1 <br />