Laserfiche WebLink
Afr. Gregg Squire -2- January 10, 1985 <br />• in the drain (see photos 3 ~ 4). Pi[ run gravel averaging two <br />inches in size was placed in the filter drain (see photo 5) and <br />the ends of the fabric were overlapped in accordance with the <br />plan (see Exhibit 1). <br />u <br />• <br />Blasted sandstone from within the pit was end dumped in six foot <br />lifts. The sandstone was then run over and reduced by dozers <br />to make access for subsequent lifts. This process resulted in <br />final lift heights of approximately four feet (see photos 6 6 7). <br />A total of three lifts were done in [his fashion to provide 12 <br />Feet of blasted sandstone with an average particle size of approxi- <br />mately 8 inches, thus completing the filter drain. Exhibit 1 <br />shows the as-built filter drain in plan, profile and cross section <br />view. <br />I certify, based upon my field observations and review of the <br />design approved as part of Permit C-054-82 for the Carbon Junction <br />Mine, that the fill underdrain system was constructed in compliance <br />with the approved design dated April 17, 1984. <br />~ ~ y pUU~'F <br />,~ . .~J~~ ~ h ;•Q, Rt <br />/ ~' cuaefA <br />Terry D. Bari~r ~ on 15082 <br />Colorado Re ~ ~~~ <br />gistered P.E. No. 15082 s'•,~ <br />'9T'~~'~GNa~ <br />TDB/jca ~~F C~ <br />Enclosures <br />cc: fir. Jim Hendricks, Pueblo Coal, Inc. (2) <br />JAN 1 C 1~E3 <br />