Laserfiche WebLink
< < <br />The access road drainage plan was certified by a professional engineer <br />• (Carl Williams-FXfEC) and a registered professional geologist (George M.L. <br />Robinson-ERTEC) and is currently on file with CMLRD. <br />After the road was built, additional studies were wrx3ucted to evaluate <br />road stability and drainage issues. <br />In 1983 (July 5), Sun Coal Canpany submitted a haul toad decamnissioning <br />reclamation plan. Slue Coal Company requested the z~oad to be left. intact, <br />with little or no charr3es to drainage control, road base or grade. CMLRO <br />denied Sun's request (Jim Pendletan~MLRO-September 15, 1983) required Sun <br />Coal Company to make road modifications in light of Sun's position (Mr. <br />Brian Munseai-CMLRD-October 10, 1983) regarding potential impacts which <br />could be incurred by adopting CMLRD reclamation criteria. CMLRD road <br />decommissioning criteria includes: <br />- grading the road surface to allow surface water drainage to be <br />conveyed to the outslope; <br />- installing water bars o~n approximately 150-175 foot spacings; <br />- riprapping water bar outlets; <br />- removing or cutting water bar xvmuts through the existing berm; <br />- improving sedSment trap erosion control structures. <br />As a result of CMLRD's request, Sun Coal Compat-y was required to grade the <br />existing road surface to ensure road surface drainage was conveyed to the <br />outslope. This activlty required the dozer operator to scarify the road <br />surface and blade the coarse surface material to the upslope. After the <br />surface material was bladed to the upslope, a dozer and/or scraper were <br />used to cut the outslbpe down to an elevation where drainage would be <br />allowed to drain to the outslope. After this activity was completed, the <br />coarse material that was previously stored on the upslope was graded,back <br />onto the area previously occupied by the outslope road base. After the <br />road surface was graded to specifications required by CMLRD, Sun con- <br />structed mater bats Sn locations approved by CMLRD(March 3, 1984). <br />Using the results from existing geological, geotechnical and hydro- <br />geological technical reports, the road appears to have been designed and <br />constructed using saurd engineering techniques and methodologies. Hosed <br />on these reports, the road and alignment were chosen with noted <br />instability concerns and was constructed as apnroved by CMLRD with the <br />urderstatxling recent grading activities and existing drainage design may <br />have induced road instability problems. It is also understood, additional <br />studies have not been conducted to verify or document the findings from <br />the original study.. Therefore, road certification is based on historical <br />records and the assumption that the original design, as modified by CMLRD <br />stipulations, is technically correct and acciuate. We are not certifying <br />that the existing access road or adjacent slopes are structurally stable. <br />• <br />- 213 - (Rev. 5/86) <br />