GENERAL41305 - Laserfiche WebLink

Home Browse Search

-61- Division believed that the operator should complete a thorough geological reconnaissance mapping of proposed roadway corridor and design projections, based upon the findings of that preliminary reconnaissance. For this reason, the Division believed it appropriate to impose the following stipulation upon approval of the upper waste pile permit revision application. Stipulation No. 15 THE DIVISION DIRECTS WEST ELK COAL CCt~ANY TO COMPLETE A THOROUGH RECONNAISSANCE GEOLOGIC MAPPING OF THE PROPPED UPPER WASTE PILE ACCESS ROADWAY CORRIDOR. THE APPLICANT SHALL PLACE SPECIFIC EMPHASIS UPON THE DETECTION OF SLOPE INSTABILITY EVIDENCE AND DRAINAGE CHARACTERISTICS OF THE PROPOSED ROAD ALIGNMENT. FURTHER, TH£ DIVISION DIRECTS WEST ELK COAL CO[+~ANY, UTILIZING THE RESULTS OF THE RENAISSANCE GEOIfJGIC MAPPING, AND EARLIER AATOINING SURFACE FACILITY IbOAD DESIGN STUDIES, IF APPROPRIATE, TO COMPLETE A PRELIMINARY ACCESS ROAD CUT-SLOPE STABILIZATION AND DRAINAGE DESIGN. THE MAPPING AND PRELIMINARY DESIGN SHALL BE APPROVED BY THE DIVISION, IN WRITING, PRIOR 70 ANY DISTURBANCE OF THE ACCESS ROAD CORRIDOR. The above stipulated mapping and design efforts would produce a preliminary stabilization and drainage design for the upper waste pile access road at the Mt. Gunnison No. 1 Mine. However, actual site-specific geotechnical cut-slope conditions would only be verified upon pioneer excavation of the actual roadway. Assumptions inherent in the preliminary design may prove to be incorrect, requiring amendment in completing a final stabilization and drainage design for the proposed roadway. For this reason, the Division believed it appropriate to impose the following stipulation upon approval of the upper waste pile permit revision application. Stipulation No. 16 THE DIVISION DIRECTS WEST ELK COAL COMPANY TO CONSTRUCT THE UPPER WASTE PILE ACCESS ROAD AS AN INITIAL PIONEER ROAD WITH MINI6IIZED EXCAVATION. UPON EXP0.SURE OF THE EXCAVATED CUT-STAPES OF THAT PIONEER ROADWAY, THE OPERATOR SHALL CCd~LETE A FINAL N'~~IICAL INVESTIGATION OF THE ACCESS ROAD CORRIDOR. THIS GEOTDC[-II~]ICAL INVESTIGATION SHALL BE COMPLETED BY APPROPRIATELY QUALIFIED PROFESSIONAL GEOLOGICAL OR ENGINEERING PERSONNE'.L. THE PURPOSE OF THIS FINAL INVESTIGATION SHALL BE TO VERIFY, OR APPROPRIATELY AMEND, THE FINDINGS OF THE RECONNAISSANCE GEOLOGIC MAPPING OF THE ROACWAY CORRIDOR. FURTHER, WEST ELK COAL COMPANY, UTILIZING THE FINDINGS OF THE FINAL GEOTECHNICAL INVESTIGATION, SHALL COMPLETE A FINAL ENGINEERED CUT-SLOPE AND DRAINAGE DESIGN FOR THE UPPER WASTE PILE ACCESS ROAD. THIS FINAL DESIGN SHALT, 6E APPROVED BY THE DIVISION, IN WRITING, AND THE CONSTRUC~'ION CONII~LETED IN ACCORDANCE WITH THAT DESIGN, PRIOR TO THE TRANSPORTATION OF ANY TrF~ST'E MATERIAL ALONG THAT ACCESS ROAD.