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• EXHIBIT G -WATER INFORMATION <br />SURFACE WATER <br />GCC Rio Grande, Inc. (Rio Grande) has collected climatological data at the site for more <br />than two years. These data, along with the National Weather Service and county USDA <br />Soil Conservation Service data, show that there is about l0 to 12 inches of precipitation <br />per year. If is reported by locals -that the specific site may have less total .rainfall. <br />However, rates of 1 inch per hour have been observed, and this can cause relatively large- <br />volume runoff. <br />The site is divided.by at least nine separate arroyos. This drainage pattern drains the <br />entire surface of the mining area to the north and northeast. The receiving stream is the <br />St. Chazles River that flows east to the Arkansas River. Some small, existing arroyos <br />have been eroded to the limestone bedrock, while others that have a gentler slope that <br />contain several feet of silt/loam soil where runoff is moderate to slow. <br />Surface water will be diverted or captured to prevent accelerated erosion. A <br />sedimentation pond will be constructed as stated in the storm water plan to capture <br />surface water that enters the surface mine area. Sediment will settle out and the clear <br />• water not used for dust control will be pumped to the connecting arroyo and allowed to <br />continue to the St. Charles River. <br />GROUNDWATER <br />There are no existing shallow water wells producing water for either livestock or human <br />consumption within two miles of the proposed permit area. Extensive shallow drilling <br />throughout the property has demonstrated that there is no significant ground water <br />contained within the geological formations that will be affected by the proposed surface <br />mine. An old springhouse located at the Blake Ranch has been abandoned; however, it is <br />surmised that surface water infiltrates the Ft. Hays Limestone at a higher elevation point <br />in the same arroyo, delivering minor amounts of water in very wet years. <br />Drilling was conducted to explore the soils, overburden (Smokey Hill Shale); the Ft. <br />Hays Limestone, and the Codel Sandstone (upper member of the Cazlile Shale <br />Formation). No free standing water was observed in any of the open core holes. In most <br />cases, water circulation used to remove cuttings from the holes was lost, due to the <br />fractured nature of the Ft. Hays Limestone. . <br />The noted primary aquifer on site is the Dakota Sandstone, which lies 450 to 490 ft below <br />the Ft. Hays Limestone. The primary rechazge area for the Dakota Sandstone is in the <br />Wet Mountains and Greenhorn Mountains that aze more than 20 miles to the west of the <br />site. A deep producing well iri the Dakota Sandstone is located on the Blake Ranch, <br />• approximately one mile to the east of the site. <br />AppEzltibi[sA-T-APP(1180)Rev8/January U, 2002 G-1 <br />