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r. O'Brian.................Eiivironment In.c. <br /> May 14, 2020 <br /> Page 3 of 3 <br /> • replace 10" of topsoil around perimeter above high water line; <br /> • revegetate perimeter areas using provided seed mix; <br /> • Costs for design and installation of appropriate pit wall and lateral berm protection will <br /> need to be included if utilized and in order to bond slurry wall at 20%rate. (see Exhibit E <br /> comments). <br /> Phase 3 — Cost for: <br /> ■ removal and disposal of all concrete pads/footers for plant, scale, office, conveyor, etc.; <br /> ■ removal of all buildings and other site facilities; <br /> ■ backfill settling pond <br /> ■ rip/regrade all affected area; <br /> ■ replace 10"topsoil over affected area and prepare for crop planting the following season <br /> or revegetate with provided seed mix; <br /> DRMS assumes Phase 3 area will be stripped of topsoil and utilized as the plant area until the last phase of <br /> mining. Groundwater will not be exposed in this area for several years; therefore, bonding for surface <br /> reclamation will be sufficient at this time provided that the required topsoil is stockpiled nearby. Permittee will <br /> need to bond appropriately to install slurry wall and reclaim as lined reservoir prior to exposing groundwater in <br /> this area. <br /> Line items provided such as: re-sloping working face to 3:1 if required; mob/demob; dewatering costs; and weed <br /> control, can be included as-is. Costs for backfilling of cells and replacement of topsoil where required should be <br /> based on total CY needed, and push distances from the appropriate stockpile locations should be included. <br /> Acreages should be provided for crop planting and revegetation tasks, and for ripping/grading tasks. <br /> The required bond for affecting the eastern portion of the permitted area(Phases 4-6)will need to be calculated <br /> and posted prior to any mining disturbance in that area. <br /> Additional Information: <br /> Any letters from other commenting agencies/entities received by the Division for this permit to date are available <br /> for review through the imaged document data link provided below, or through the DRMS website. <br /> This concludes the Division's third adequacy review of this application. This letter shall not be construed to mean <br /> that there are no other technical deficiencies in your application. Other issues may arise as additional information <br /> is supplied. Please remember that the decision date for this application is June 18, 2010. As previously <br /> mentioned, if you are unable to provide satisfactory responses to any inadequacies prior to this date, it will be <br /> your responsibility to request an extension of time to allow for continued review of this application. If there are <br /> still unresolved issues when the decision date arrives and no extension has been requested, the application will be <br /> denied. If you have any questions, please contact me at(303) 866-3567 x8140. <br /> Sincerely, <br /> 0004 <br /> Eric Scott—Environmental Protection Specialist <br />