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EXHIBIT G -WATER INFORMATION <br />(a) Locate on the map (Exhibit C) tributary water courses, wells, springs, stock water ponds, reservoirs <br />and ditches <br />Please refer to Exhibit C. <br />(b) Identify Afl known aquifers <br />Shallow alluvial aquifer. <br />(c) Show how water from dewatering operations or runoff from disturbed areas, piled material and <br />operating surfaces will be managed to protect against pollution of either surface or groundwater both <br />during and after the operation. <br />Refer to the Mining Plan Map, Sheet 2. Mine areas will drain internally. Uncontrolled releases of <br />surface water and sediment will not occur. Stormwater collected in the open pit will be managed in <br />accordance with a stormwater management plan and Colorado Discharge Permit System <br />requirements. <br />(d) Estimate project water requirements including flow rates and annual volumes for the development, <br />mining and reclamation phases of the project. <br />Approximately 24.1 acres of exposed water surface from dewatering trenches and settling ponds will <br />cause 71.4 acre-feet per year of evaporative losses. <br />Assuming a production rate of 1.5 million tons per year, approximately 44.1 acre-feet per year of <br />water will be lost as a result of mining aggregate. Batching 150,000 yd3 of concrete wilt use up 15.5 <br />acre-feet of water per year and approximately 2 acre-feet of water per year will be used for dust <br />control. <br />The water needed to supply the site requirements stated above will come from on-site water pumped <br />from the proposed settling ponds and dewatering trenches. This water will then be replaced by <br />leasing reuseable efFluent from a municipality or by utilizing consumptive use credit (HCU) from <br />historic diversions made by on-site irrigation ditches. A Temporary Substitute Water Supply Plan <br />(TSSP) will be created to more closely analyze the timing and location of the depletions. This plan <br />wiN be renewed either every two years or whenever the replacement water lease is at term. <br />(e) Indicate the projected amounts of the water sources to supply project water requirements <br />The required volume of water will be either; 1) leased from an upstream municipality and <br />released to the river according to the specified timing per the TSSP to ensure no injury to <br />downstream water users or, 2) historic consumptive use credit will be utilized. If HCU credit is <br />used, it will require that wintertime replacements are made by leasing efFluent from a <br />municipality. The amounts of replacement water will vary if the HCU credit is used due to the <br />SW 7K0 Joint Venture, LLC. -Adams Sand and Gravel Mine -112 Reclamation Permit Amendment Page 19 <br />