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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 Arkansas River conveys water from west to east across the south part of the site. The <br /> headgate of the Excelsior Ditch is on the north side of the river approximately 500 feet west <br /> of the site. The headgate receives flows from the Arkansas River and conveys water from <br /> west to east across the site. Other surface water features include Thunderbird Lake and two <br /> (2) unnamed ponds located on the southwest part of the site. Thunderbird Lake and the <br /> unnamed ponds appear to be unlined gravel lakes remaining after previous borrowing of <br /> gravel at the site. Please refer to Exhibit C for locations of water courses in close proximity <br /> to the site, including wells, springs, stock water ponds, reservoirs and ditches. <br /> (b) Identify all known aquifers <br /> The site is underlain by a shallow alluvial aquifer of the Arkansas River. Review of area <br /> water well logs indicate no bedrock aquifers underlie the site. <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 /> Dewatering will be accomplished by digging a sump, generally along the base of the mine <br /> slope, which will hold a floating pump. The pump will have an HDPE discharge line that will <br /> be routed to one of the comingled discharge points located at the site. The Operator will <br /> obtain a Colorado Discharge Permit System (CDPS) Discharges from Sand and Gravel <br /> Mining and Processing General COG500000 permit prior to discharging water off site. <br /> (d) Estimate project water requirements including flow rates and annual volumes for the <br /> development, mining and reclamation phases of the project. <br /> Water needs estimated below provide for sustained production as detailed in the Mining <br /> Plan. The Operator will adjust water supplies to account for actual demand, avoid waste, <br /> and continuously comply with laws and regulations of the Division of Water Resources and <br /> any other water agency having jurisdiction over the operation. <br /> Projected Use and Consumption: Annual evaporative depletions will be the evaporation <br /> from up to 5,000 feet of 5-foot-wide de-watering trench, located inside of the mine limit. The <br /> total area of exposed water is 0.6 acres. The gross annual evaporation at the mine is <br /> Martin Marietta Materials—Thunderbird Sand and Gravel—MLRB 112 Permit Application <br /> Exhibit G- 1 <br />