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«2STMUDc? : <br />We used a rod, a vertical staff graduated in feet and hundredths of <br />a foot, and an engineer's level, a telescope mounted on a tripod <br />that is equipped with sensors that enable it to sight along a level <br />line, to determine vertical distances which are added to the <br />beginning elevation to determine the height of the telescope and <br />then and subtracted to obtain the elevation of new points. We <br />began at the hydrant 100 feet West of Dunwoody Avenue and used <br />various temporary points of convenience to transfer elevation to <br />the basement floor and then back to the hydrant 100 feet West of <br />Dunwoody Avenue as a check on our observations and computations. <br />RESULTS: <br />We measured the basement floor to be at 929.46 feet above mean sea <br />level. This elevation of 92i>.«*6 is 2.04 feet below the elevation <br />of 931.50 as noted above. <br />Sincerely, <br />ADVANCE SURVEYING & ENGINEERING CO. <br />Samuel G. Parker L.S. <br />Vice President