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<br />The tracing was then scanned into Corel Draw! where the scan sections were merged <br />and dimensionally adjusted to match the aerial photo image. The line tracing was then <br />converted to a Corel object file that was used as the basis for the maps presented in this report. <br />r•'~ <br />Scaling of the photograph and map was done using a 22 power measuring microscope. <br />The five identifiable and measured featwes were examined and scaled. The fmal scale of the <br />map, approximately 1 inch to 218 feet, was calculated by averaging the measurements of the <br />five features. The true scale of the photograph appears to vary from one area to another. This <br />is due to not only the normal curvature of the image, but also because it appears the airplane <br />was slightly tilted resulting in a slightly oblique view angle. No particular pattern was <br />identified in the scaling process so no directional scaling adjustment could be made. A pattern <br />probably exists but it is undoubtedly complex. Without knowing the angle of image tilt, the <br />lens focal length, and altitude of the airplane there is no way to calculate a correction factor. <br />But, the average scale is certainly adequate for most purposes. <br />A topographic map included in the permit file was used to cross check the scaling of <br />the photograph and traced map. This provided some further information and it was determined <br />that the calculated scale is probably within plus or minus 25 feet of true in most areas. Again, <br />for the purposes of this plan, greater accuracy than this is not necessary at this stage of the <br />design. <br />All areas of the site were thoroughly examined with respect to slope gradients, surface <br />material condition, erosional damages, drainage patterns, vegetation present, and relationship <br />_ ~ with adjacent disturbed and undisturbed ]and. This examination allowed the synthesis of a <br />zonation map of the site called the "Base Features Map." The degree of ground condition <br />classification was limited to features that were identifiable on the aerial photo. Further <br />classification was certainly possible, but the meaningfulness of a highly specific classification <br />was considered low. <br />No quantitative sampling of the vegetation was done. The examination was qualitative <br />with estimates of quantitative data provided where relevant. Soil examinations were also <br />qualitative and were based mainly on examination of the physical properties of the surface and <br />what was growing in the soils. Slope measurements were done with a hand level and a Brunton <br />Compass. At least three measurements were averaged to calculate slope gradient. <br />RESULTS OF INSPECTIONS <br />GENERAL SITE DESCRIPTION: The quarry extends along an east west line and is <br />about twice as long as it is wide. Total elevation change from the road entrance to the top of <br />the excavation is about 750 feet. Five major benches and one minor bench were identified. <br />l7eer Creek Quarry Rehabilitation June 1994 Page 2 <br />