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<br />MINING PLAN <br />EXHIBIT D (CONT) <br />the operation will continue to be used by the landowners for <br />agricultural purposes. <br />GEOLOGIC SETI7NG <br />The affected lands are located along the South Platte River <br />in a Quaternary age, Piney Creek alluvial deposit. The eastward <br />dipping beds of Upper Cretaceous age are overlain at an angular <br />unconformity by the Pine Creek alluvium. The sand and gravel <br />encountered in the Piney Creek alluvium are a result of water <br />erosion and redeposition of rock materials from the front range <br />of the Rocky Mountains. The deposition of this material occurred <br />during a time when the river was much larger than it is now. <br />But, judging from the scarcity of large rocks found at the <br />location, the velocity of the river must have slowed sufficiently <br />to have dropped boulders and most large cobble before it reached <br />this point. <br />This type material is found from south of Denver to the <br />state line along the South Platte River. The quantity of course <br />gravels and sand vary from a ratio of 80% rock to 20% sand in <br />Denver to 30% rock 70% sand at Julesburge. We have found along <br />this section of the river deposit has a 50% rock, 50% sand ratio <br />and the deposit is more than 45 feet deep. It appears to be of <br />fairly uniform depth across the property with deep spots on the <br />south end and near were the St. Vrain Rivers enters the Platte. <br />Overlying the gravel deposit is a thin layer of soil that varies <br />from 0 to 24 inches, averaging 9 inches overall. <br />/ SOILS AND OVERBURDEN <br />There are 7 types of soils found on the site. These soils <br />appear to be typical along the South Platte River in Weld County. <br />They have no unusual qualities and are marginal for agricultural <br />purposes. See the SOILS AND VEGETATION INFORMATION for the <br />soils information prepared by the Natural Resources Conservation <br />Service regarding the soils information on this site. The soil <br />information presented by the SCS is not site specific, it <br />describes in general terms the nature of the soils found at this <br />site. Since their data is not site specific, we have supple- <br />mented it with our site specific observations below, and included <br />the general information as reference material. <br />The 7 types of natural soil on the mining parcel as deter- <br />mined by the Natural Resources Conservation Service, are <br />designated on the soils map as Units 1, 2, 3, 10, 16, 21, and 68. <br />Descriptions for each soil is part of the NRCS report that is in <br />the Soils and vegetation part of this application. <br />MINING PLAN <br />Of the total 1,239.40 acres in the permit; 831.11 acres ± <br />are to be mine, 768.32 acres ± will be water (lake area); 64.17 <br />acres ± will need reclamation and 12.75 acres will be roads. The <br />remaining 394.16 ac ± to be undisturbed area or setbacks around <br />the mine. The 768.32 acres ± of water surface area will be broke <br />5 <br />