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Mr. Mark McLean, P.E. April 21, 2017 <br /> Page 2 of 5 <br /> mine site, totaling 6.1 acres, water removed in mined product, and water used for dust <br /> suppression. Fremont Paving is not planning on providing water for batching concrete during this <br /> plan year. <br /> The 6.1 acres of exposed ground water includes approximately 3.6 acres of ponds in Phase I, <br /> approximately 1.0 acre at the sedimentation pond in Phase II, and up to 1.5 acres of dewatering <br /> trench. <br /> In accordance with the letter dated April 30, 2010 from the Colorado Division of Reclamation, <br /> Mining, and Safety ("DRMS"), all sand and gravel mining operators must comply with the <br /> requirements of the Colorado Reclamation Act and the Mineral Rules and Regulations for the <br /> protection of water resources. The April 30, 2010 letter from DRMS requires that you provide <br /> information to DRMS to demonstrate you can replace long term injurious stream depletions that <br /> result from mining related exposure of ground water. According to a previous renewal request, the <br /> long term plan for the site is to construct reservoir liners adequate to prevent the infiltration of <br /> tributary ground water. According to the 112c Annual Report received by DRMS on June 4, 2015 <br /> (available from the DRMS website at the following link: <br /> http://drmsweblink.state.co.us/drmsweblink/0/doc/1070247/Electronic.aspx?searchid=630e0d15- <br /> 6426-4bea-a388-d4228679d6bc), Fremont Paving currently holds a bond in the amount of <br /> $2,095,000.00 for reclamation at the site. <br /> Please provide an explanation and/or documentation that the financial warranty in the amount <br /> $2,095,000.00 is sufficient to cover the cost of installing a clay liner or slurry wall that meets <br /> the Division of Water Resources requirements for preventing ground water exposure, in <br /> accordance with approach no. 3 of the April 30, 2010 letter from DRMS, with the next SWSP <br /> renewal request. Alternatively, if the long term plan for the site is to backfill areas of exposed <br /> ground water, please provide an explanation and/or documentation that the financial warranty <br /> in the amount $2,095,000.00 is sufficient to cover the cost of backfilling areas of exposed <br /> ground water that meets the Division of Water Resources requirements for preventing ground <br /> water exposure, in accordance with approach no. 1 of the April 30, 2010 letter from DRMS, <br /> with the next SWSP renewal request. Any future renewal request for this SWSP may not be <br /> approved unless submitted with the explanation and/or documentation requested above. <br /> DEPLETIONS <br /> Well permit no. 54064-F (WDID 1406561) was obtained to expose water in this pit. Fremont Paving <br /> will continue to mine the site with an estimated annual amount of aggregate to be produced of <br /> 200,000 tons. This plan is based on 6.1 acres of exposed water surface area for April 2017 through <br /> March 2018, broken down above. The total of 6.1 acres of exposed ground water will result in <br /> 21.03 acre-feet of evaporative loss (see attached Table 1). A total of 9.20 acre-feet of water is <br /> expected to be consumed by mining operations, consisting of 5.89 acre-feet of water lost in <br /> 200,000 tons of aggregate and 3.31 acre-feet used for dust suppression (see attached Table 2). <br /> Total operations with evaporation will result in 30.23 acre-feet of consumptive use. Projected uses <br /> and consumption during the 2017 - 2018 plan year are as shown in the attached Tables 1, 2, and 3. <br /> A Glover analysis was used to create unit response function ("URF") in order to determine the <br /> Lagged depletions to the Arkansas River using the following parameters: <br /> • Transmissivity - 100,000 gallons/day/foot <br /> • Storage Coefficient - 0.20 <br /> • Distance to the Stream - 1,710 feet <br />