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O D Y <br /> VIID <br /> EOMPANY <br /> October 18, 2019 <br /> Mr. Eric Scott <br /> Division of Reclamation, Mining, and Safety <br /> Colorado Department of Natural Resources <br /> 1313 Sherman Street, Room 215 <br /> Denver, CO 80203 <br /> Re: Technical Revision (DRMS Permit# M-2001-046) NIX Sand and Gravel Mine <br /> Dear Eric: <br /> RMCC recently entered into an agreement with Dixie Water LLC to construct a slurry wall at the NIX <br /> property. The slurry wall will be constructed in the area of the property outside of the current mine <br /> plan located in the NE1/4, Sec 28, T3N, R67W. This area is inside the permitted mine area but <br /> outside the planned mine area. <br /> Dixie Water intends to construct the slurry wall to bedrock for the purposes of developing an In-Situ <br /> Water Storage Reservoir. In preliminary concept, Dixie water will install 6 dewatering wells at the <br /> site and 2 water infiltration basins to allow recharge of the reservoir. Figure 2 of the attached shows <br /> the location of the slurry wall, water infiltration basins, and dewatering wells. Overburden and Gravel <br /> extracted from the re-charge ponds will be placed in separate locations, graded, and re-vegetated, at no <br /> time being processed or exported as a construction material. No other infrastructure is planned at this <br /> time. <br /> RMCC requests approval of this Technical Revision in advance of anticipated leak-testing and other <br /> relevant oversight by the Colorado Division of Water Resources. The company is also evaluating the <br /> scope and schedule for gravel mining at the site. At some point in the future, RMCC intends to <br /> submit a plan to DRMS that includes installation of slurry walls throughout the site that will allow for <br /> "dry" mining. In the interim, construction of this slurry wall will allow RMCC's partner, Dixie <br /> Water, to utilize to property for water storage. <br /> Enclosed with this letter please find the following: <br /> 1. Request for Technical Revision (TR) Cover Sheet <br /> 2. Project Scope/Overview <br /> 3. Figure 1 —NIX Permit Map <br /> 4. Exhibit 2 —In-situ Reservoir Plan <br /> Read,Mixed Concrete Compan} Address: 11778 Highway 52, Fort Lupton.Colorado 80621 Office Phone: (303)286-1983 <br />