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''PN: 50363PE <br />December 8, 2005 <br />Page 3 <br />The analysis indicates that the theoretical factor of safety of the slope is about 3.36 which is an <br />indication that the proposed geometry will be stable. <br />The analysis above is appropriate for any cross section of the above geometry adjacent to the right- <br />of-way fence, well location and above ground utility poles. <br />We understand that there are subsurface gas lines buried about four (4) feet below the ground <br />surface in some areas where truck traffic will cross the lines and in other areas where truck traffic <br />will pazallel the gas line alignment. We assume that the gas lines are steel pipe. We did not perform <br />a specific analysis of the pipe and loaded truck scenario, but it is highly unlikely that the proposed <br />truck traffic will have any influence on the integrity of the pipe due to the depth of burial of the line. <br />Any truck traffic that travels pazallel to the lines that is further than four (4) feet horizontally away <br />from the line alignment will have no influence on the line. If any of the soils in the vicinity of the gas <br />lines become soft and or very moist to saturated, it may be prudent to consider construcfion of a <br />concrete apron over the lines for added protection. <br />It is our opinion that the natural gas pipeline will not be negatively influenced by the gravel mining <br />operations provided that the geometry analyzed above is constructed. <br />Please contact us if you have any questions, or if we maybe of additional service. <br />~~ <br />F~ <br />~~, <br />i F~r,~:.,.3w.'~ <br />Cc ~~~'~• :N1r.. Bnan Kimmel, Southwest Land Services <br />TRAUTNER ~ <br />A DIVISION GF TRIGON41I~7~3 <br />