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(blue earth <br /> SOLUTIONS <br /> January 20, 2022 RECEIVED <br /> E® <br /> Colorado Department of Natural Resources <br /> Division of Reclamation, Mining and Safety JAN 2 5 ZQ2Z <br /> Attn: Mr. Peter Hays <br /> 1313 Sherman Street; Room 215 DIVISION RECLAMATION, <br /> Denver Colorado, 80203 MINING &SAFETY-MINEF�ALS <br /> RE: Technical Revision for City of Greeley <br /> 2511 Avenue Site, Permit No. M-2002-020 <br /> Dear Mr. Hays: <br /> The following Technical Revision discussion and attachments are submitted on behalf of our <br /> client, City of Greeley, for the 251h Avenue Site, M-2002-020. The Technical Revision is to <br /> provide updated information regarding the 25`h Avenue Site final Reclamation Plan. <br /> The 25`h Avenue Site is located in the City of Greeley (Weld County, Colorado) north of F Street, <br /> south of the Cache la Poudre River, and between 251h Avenue and 351h Avenue. The 25`h Avenue <br /> Site was created from amending portions of the Greeley West Pit(M-1977-081) in 2002 and again <br /> in 2012 and currently includes approximately 208.2 acres. <br /> Mining Plan <br /> The revised mining plan from the approved 2012 Amendment shows mining occurring in the area <br /> known as `Pond B'. This Technical Revision does not change the 2012 mining plan. Currently, <br /> mining in the Pond B area has been mostly completed. <br /> Reclamation Plan <br /> The 25`h Avenue Site final land use is currently permitted for developed water resources and <br /> includes lined below-grade reservoirs in Pond A and Pond B (see Exhibit F, Reclamation Plan <br /> Map). This Technical Revision does not propose changing the permitted final land use. As <br /> illustrated on the revised Exhibit F, Reclamation Plan Map,the purpose of this Technical Revision <br /> is to add new reservoir infrastructure to the final Reclamation Plan. The currently approved <br /> Reclamation Plan includes the Pond A below-grade reservoir (slurry wall constructed and <br /> approved by Office of the State Engineer September 29, 2003) and construction of a slurry wall <br /> around the Pond B mining area.To facilitate efficient operation of the existing Pond A below-grade <br /> reservoir and the proposed Pond B reservoir, an interconnect pipe between the two reservoirs is <br /> being added to the Reclamation Plan. <br /> Blue Earth Solutions, LLC P.O Box 2427 Fort Collins, CO 80522 ♦ (970)227-2803 <br />