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• Area 44 slopes to the northeast at approximately 3.3%. This is close to the slope of 2.6% <br /> estimated from the map in the application. <br /> The use of GPS technology for elevations was not successful for determining elevations due to technical <br /> difficulties that were not identified. The Division determined that for this application at this site, it was <br /> not necessary to solve the technical problem or perform another inspection for the following reasons: <br /> • Visual observations and laser technology revealed that the grading at the site generally matches <br /> the plan in the PAP. <br /> • The site has not exhibited erosion or other problems in the past. <br /> • The site is very flat and sandy, and erosion issues are unlikely in the future. <br /> Drainage Reconstruction <br /> Each of the SL-11 bond release parcels has an aspect that matches the plan in the PAP. <br /> Therefore, runoff from each parcel will drain in the proper direction and ultimately to the two <br /> sedimentation ponds prior to discharging from the site. The channel along the north perimeter of the <br /> site is included within the bond release area (Area 45), and it appears to be functioning well. <br /> Summary and Conclusions <br /> Based upon a review of the mine permit,the applicant's bond release application, and site inspections, <br /> the Division finds that Coors Energy Company has complied with the approved reclamation plan for <br /> backfilling, grading, and drainage re-establishment for the SL-1 lareas, including the criteria listed <br /> above in the section Approval Criteria for Bond Release. <br /> IV. PROPOSED DECISION <br /> Based on the observations above,the Division proposes to approve Coors Energy Company's request for a <br /> Phase I bond release for the Keenesburg Strip Mine. This proposed decision will release the applicant from <br /> liability for backfilling,grading, and drainage reestablishment for approximately 101 acres. These areas <br /> are depicted as Areas 35 - 38 and Areas 42 -45 on the map submitted with the SL-11 application, <br /> included above. <br /> The current reclamation liability amount set for the site is$1,201,563 (from RN-08 approved April 14, <br /> 2022). The current surety held is equal to this amount. <br /> In order to estimate the liability eligible for release with the approval of the SL-1 I application,the site-wide <br /> cost estimate was updated with the most recent unit costs, and the reclamation tasks associated with <br /> backfilling and grading the SL-1 I bond release parcels were removed from the estimate. The <br /> mobilization/demobilization and indirect costs were reduced. The new reclamation liability is$818,406. <br /> Enclosed is the summary of reclamation costs and the detailed calculations for each task. <br /> Page 8 <br />