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<br />30?R?3 <br /> <br />SYSTEM OF NUMBERING WELLS AND TEST HOLES <br /> <br />The well numbers on the hydrographs (figs. 2-4) indicate <br /> <br />, <br /> <br />the locations of the wells. The numbers are based on the U.S. <br /> <br />Bureau of Land Management system of land subdivision, and show <br /> <br />the location of the site by principal meridian, quadrant, town- <br /> <br />ship, range, section, and position within the section. A graphic <br /> <br />illustration of this method of describing the location of a well <br /> <br />is shown in figure 5. The first letter, S preceding the location <br /> <br />number means that the site is located in the area governed by the <br /> <br />sixth principal meridian. The second letter, C (also preceding <br /> <br />. <br />" <br /> <br />the location number), indicates the quadrant in which the well is <br /> <br />located. Four quadrants are formed by the intersection of the <br /> <br />base line (the fortieth parallel) and the principal meridian--A <br /> <br />indicates the northeast quadrant, B the northwest, C the south- <br /> <br />west, and D the southeast. The first numeral indicates the <br /> <br />township, the second the range, and the third the section in <br /> <br />which the well is located. The letters following the section <br /> <br />number locate the well within the section. The first letter <br /> <br />denotes the quarter section, the second the quarter-quarter <br /> <br />section, and the third the quarter-quarter-quarter section. <br /> <br />The letters are assigned within the section in a counter-clockwise <br /> <br />direction, beginning with A in the northeast quarter. Letters <br /> <br />are assigned within each quarter section and within each quarter- <br /> <br />8 <br />