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MINING PLAN <br />and coordinates (NAD WGS84) will provide an all inclusive means to enter updates as needed and <br />keep all subsequent reporting maps coordinated using the same system. Due to the large size of this <br />site as well as the character of this prairie land an efficient and accurate means to locate features is <br />needed. In the past it has been found that locating actual features with accuracy was exceptionally <br />difficult. <br />Underlying this GPS gridding but only in the digital maps is a high resolution satellite image <br />of the entire site (Apri124, 2002 date and between 9 and 11 AM). Thus, not only can the GPS <br />coordinates be used to locate features but also visual details can be used to cross-check the GPS <br />locations. This satellite image is of high enough detail that features as small as prairie dog holes can <br />sometimes be seen, although it has been found that prairie dog holes and ant hills are sometimes hard <br />to distinguish on the imagery. For very specific uses, even higher detail imagery can be accessed that <br />shows not only the prairie dog holes but the dark center of the mound where the burrow is located. All <br />of this imagery was obtained by meshing together many individual downloaded images from the <br />Terraserver USA web site. The full resolution of the imagery is 0.3 m/pixel, but that does not seem to <br />actually be revealed as JPG compression has somewhat reduced that resolution. Nevertheless, the <br />imagery contains more than enough information for nearly all purposes. If the imagery is updated at <br />some point in the future then a new photo mosaic will be created to replace the current imagery. This <br />photo is not provided on the permit maps, but is available with permit map overlays on CD-ROM or <br />DVD-ROM. <br />Although the printed maps are in monochrome, color maps are also available in digital format <br />(Adobe Acrobat PDF or TIF) at full size and 300 or 600 dpi. The color maps can also be provided <br />with the satellite imagery visible. These digital files are very large files, especially the TIF files, and <br />can be provided only on CD-ROM or DVD-ROM. Due to the large size of the files, email transfer is <br />not feasible. The original work files are in color and are in Corel Draw format. The vector information <br />can be converted to AutoCAD DWG files if needed, but the photo will be excluded from the DWG <br />files. <br />Nature of the Sand Deposits <br />The sand deposits to be mined in this operation follow two rather different patterns and are <br />derived from two separate geomorphic processes. The sands are divided into an upland form and a <br />lowland form. Both types are derived primarily from alluvial deposits, but also contain significant <br />amounts of aeolian sand. Sand deposited in the past by streams was also subject to blowing and at <br />various times in the distant past small dunes appear to have been present on portions of this land. <br />During the prolonged drought of the xerothermic period (about 5,000 years ago), it is likely that <br />vegetation was sparse and perhaps the landscape looked more like the Sahara or Gobi deserts do <br />today. <br />Coal Creek Sand Resource Amendment 3 (2005) - M-1988-044 Exhibit D Page 9 <br />