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C_ IV"I1 IMF7t,lI:C�S, LL+ <br /> March 5, 2018 <br /> Mr. Eric Scott ORCEIVEQ <br /> Division of Reclamation, Mines, and Safety MAR 1 <br /> 1313 Sherman Street, Room 215 4 2018 <br /> Denver, Colorado 80203 DIVISION OF R2CLAMATION <br /> MINING ANL SAFETY <br /> RE: Nissen Gravel Mine, Permit No. M-20-076; Technical Revision 1 <br /> Dear Mr. Scott: rn .�L0o-3 �50/ <br /> This letter is being generated to update the Nissen Gravel Mine, Mining Plan and current bond. The <br /> Site is currently a permitted gravel mine that has seen minimal use over the past 15 years. Central <br /> Colorado Water Conservancy District(CCWCD)currently uses the Site for insitu water storage to store their <br /> changed water rights. The slurry wall leak test was approved in 2008 and CCWCD has used the water <br /> storage since 2008 or slightly thereafter. An updated leak test was performed in January 2015. <br /> The miner intends to start mining at a greater rate in the next 6 months and intends to mine the Phase 1 <br /> area in the next 3 to 5 years. Attached is a copy of the proposed mining plan, mining plan map and a copy <br /> of the updated bond estimate and a letter discussing the slurry wall. <br /> Sincerely, <br /> CIVIL RESOURCES, LLC <br /> I' <br /> Andy Rodriguez, P.E. <br /> cc: Mark Johnson, Bestway Concrete and Aggregate Inc. <br /> Encl: <br /> Slurry Wall letter <br /> Updated Reclamation cost <br /> Approved Slurry Wall Letter post repair <br /> Mining Plan Map <br /> JABestway-2131nissWtechnica1 revision7R-1 M2003-001.doc <br /> o n o r ,--r , c-..-.'-r--r. o n o r,., con . cr,--..--, .-. n-, r,-. r..-, o n c o n . o .-.. -• �n� o�� i n s c . r ..• ono 0 0 o n o c n <br />