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EXHIBIT G -WATER INFORMATION <br /> This information provided in this Exhibit is intended to satisfy the requirements outlined in Section <br /> 6.4.7 of the Colorado Mined Land Reclamation Board Construction Material Rules and <br /> Regulations: <br /> (a) Locate on the map(Exhibit C)tributary water courses, wells, springs,stock water <br /> ponds, reservoirs and ditches <br /> The St. Wain River is less than 100 feet to the north. Please refer to Exhibit C for locations <br /> of water courses, ditches and well permit in close proximity to the site, including wells, <br /> springs, stock water ponds, reservoirs and ditches. <br /> (b) Identify all known aquifers <br /> The Site is underlain by the St. Vrain River alluvial aquifer. <br /> (c) Show how water from dewatering operations or runoff from disturbed areas,piled <br /> material and operating surfaces will be managed to protect against pollution of either <br /> surface or groundwater both during and after the operation. <br /> Please refer to the Mining Plan Map in Exhibit C of this application. Mine areas will drain <br /> internally. Uncontrolled releases of surface water in disturbed areas will not occur. <br /> Stormwater collected in the active mine area will be managed through the dewatering <br /> system. <br /> (d) Estimate project water requirements including flow rates and annual volumes for the <br /> development,mining and reclamation phases of the project. <br /> Projected Use And Consumption: Annual evaporative depletions will be the evaporation <br /> from up to 5000 feet of 4-foot wide de-watering trench, located inside of the slurry wall. The <br /> total area of exposed water is 0.5 acres. The gross annual evaporation at the the Shores <br /> aggregate mine is 42 inches according to NOAA Technical Report NWS 33, Evaporation <br /> Atlas for the Contiguous 48 United States. Monthly evaporative losses are determined using <br /> percentages specified by the State Engineer's Office for locations below 6,300 feet. The <br /> nearest weather station is in Longmont where the average annual precipitation is 15.08. <br /> Effective precipitation, that part of historical precipitation which was consumed by native <br /> vegetation on land to be covered by water surface, is conservatively estimated to be 70 <br /> percent of the total precipitation. The annual average effective precipitation at the property is <br /> estimated to be 10.56 inches. When subtracting the effective precipitation from the gross <br /> evaporation yields, the net annual evaporation is 32.13 inches, or 2.68 acre-feet per acre. <br /> The annual amount of evaporation from open water surfaces is 1.34 acre-feet. <br /> Mining Production&Operations: Bestway Concrete &Aggregates expects to extract a <br /> maximum of 500,000 tons annually of aggregate material from the site. The water retained <br /> in the 500,000 tons will be replaced pursuant to the Substitute Water Supply Plan (SWSP). <br /> The total annual amount of water retained in the gravel product from mining activities totals <br /> 14.71 acre-feet. <br /> Bestway Concrete&Aggregates—Vogl Amendment-Shores Mine—MLRB 112 Permit Application <br /> Exhibit G-1 <br />