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<br /> <br />6 inches of fine materials about like soil type 1 and 2. Under this <br />• material is various depths of much more coarse limestone rocks. <br />The final result, to he described in detail in the topsoiling section, <br />is a layer 12 to 24 inches deep of loose material that will serve as <br />the plant growth medium. <br />The second aspect is basically supplemental. In the event <br />the above described process leaves too thin a veneer of material, fines <br />produced by the processing operations will be hauled to the area and <br />mixed with what material is present to provide sufficient depth. <br />Once the area has been "backfilled" it is graded to final <br />contour and any erosion control measures are then created. Where no <br />mining occurs the existing fines are simply graded to the final <br />contours. The latter case mainly applies to tY:e area where the <br />• industrial park will be built. <br />~rlater - Minimization of disturbances to the prevailing hydrologic <br />valance of the land will be effected by utilizing the measures described <br />in the water resources e:chibit in addition to contour erosion control <br />ditches on regraded slopes and the two large terraces that will <br />probably have to be built on the upper parts of Tract A. <br />The contour ditches will be constructed at 50 to 75 foot <br />horizontal intervals on the regraded slopes. The pattern of construction <br />will be such that no ditches will completely traverse the slope. Tlie <br />ditches will be scattered across the slope for lengths of 50 to 100 feet <br />and with overlapping ends so as to prevent channel erosion through <br />overflow of the end of any one channel. This will create an irregular, <br />diverse texture that should not be very noticeable from even close-up <br />to the site. Fach ditch will be about 2 to 3 feet deep and have a flat <br />bottom that should. capably catch runoff and silt. <br />P-B-6 <br />