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NDEC -4 through NDEC -9). Land owner consent is presented as Appendix pages <br />A14 -5 -40 and A14 -5 -41. <br />The Northwest Intake portal was sealed in May 1990, but was not reclaimed until the <br />mine filled with water to the portal elevation. The water level reached the portal near <br />the end of 1992 and long term drainage was established as NPDES outfall 002. The <br />portal was backfilled in accordance with Figure 14 -2, regraded and seeded in 1993. <br />See Exhibit 13C for the location of the reclaimed Northwest Intake portal and outfall <br />002. Mine water discharge from Outfall 002 was discontinued when the new <br />discharge site, Outfall 016, was put into service in 2002 and will only be re- activated if <br />there is a problem with Outfall 016. <br />(b) Powderhorn Coal Company has typically chosen to use those reclamation <br />cost estimates prepared by Colorado Division of Minerals and Geology <br />(DMG). Those costs are agreed upon by both parties prior to approval of any <br />revisions or subsequent renewals. Should Powderhorn Coal Company desire <br />to use cost estimates other than those prepared by DMG, a detailed estimate <br />with supporting calculations would be provided. <br />Original reclamation cost estimates and associated unit volumes are given in <br />Appendix 14 -2 for the mine facilities in 1981. Appendix 14 -3 includes original cost <br />estimates for CRDA Nos. 2 and 3 (approved in PR -01 in 1985). The original cost <br />estimates for the South Lease Exploration reclamation are given in Appendix 2 -1 and <br />2 -2, Tab Section 2. Appendix 14 -4 includes original cost estimates for the Permanent <br />Flood Control Dike (TR -02) and the 2 West Portals (TR -14). Volumes and areas may <br />still be valid in these Appendices. The Operator does not plan to construct CRDA133, <br />therefore estimated cost of reclamation for the proposed CRDA No. 3 refuse pile is <br />not required. <br />(c) Upon permanent closure of the mines or discontinued use of an individual <br />disturbance area, reclamation will be started within one year. The initial phase <br />will include sealing of the portals and removing surface facilities. The seals <br />will be installed in accordance with part (g) of this <br />MR-80 14 -4 Rev 10/13 <br />