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ENVIRONMENT, INC. PAGE 6 <br /> L.G. EVERIST, INC.-WEST FARM RESERVOIR ADEQUACY RESPONSE 02 <br /> JURY 10,2023 <br /> EXHIBIT L-Reclamation Costs (Rule 6.4.12): <br /> 25) DRMS will evaluate the reclamation bond calculation when the other adequacy issues have <br /> been resolved and the appropriate revisions made. <br /> Attached is a revised Reclamation estimate cost providing information on the items revised. <br /> In particular the preliminary estimate was not affected since the installation of the under <br /> drain and additional armoring and the under drain in Phase 1 will not occur until mining begins <br /> in that Phase. Schnabel provided an underdrain construction unit cost of $82.03 per foot <br /> using 12 inch plastic perforated. <br /> Proof that a copy of this response and attachment was placed with the Weld County Clerk <br /> of the Board will be provided under separate cover. I hope these responses have addressed <br /> the adequacy questions you had. If you have any questions please call. <br /> LIST OF ATTACHMENTS TO THIS RESPONSE: <br /> Mining Plan & Timetable - revised • Groundwater Sampling Plan - revised <br /> Reclamation Plan & Timetable & Figure • Exhibit L - Reclamation costs - <br /> E-1- revised revised <br /> Exhibit F - Reclamation Map - revised Bank Armoring Plan <br /> Exhibit G - Water revised Copy Savage & Savage Corps - Jl) <br /> • Map Exhibit 6-1 - Wells - revised Request 6-26-2020 <br /> • Typical Monitoring Well diagram USACE AJ0 Letter & attachments <br /> • Groundwater Monitoring Plan - 2-3-21 <br /> revised <br /> Sincerely, <br /> Environment, Inc <br /> ,z�e4�92-- <br /> Stevan L. O'Brian <br /> President <br /> cc L.G. Everist, Inc. <br /> Weld County Clerk <br /> file <br /> enclosures <br />