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so;~s ~w~~;.ea;:~s <br />• <br />should not be mixed with the better material near the surface. Therefore, salvage <br />is recommended to a depth of about 12 inches on essentially all areas where gravel <br />will be removed AND soil is present. <br />In other areas where gravel extraction will not actually occur, it is <br />possible that some roads and other support activities will be implemented. In <br />some cases, it is advisable to remove the soil prior to construction of any of <br />these facilities which will not remain after the operation. Most roads in the <br />areas outside the gravel extraction zones will remain after the operation to <br />provide access to various parcels of the property. Many of these roads could also <br />become part of the development plan for the site after gravel extraction is <br />completed. <br />Soil replacement should occur, if at all possible, without stockpiling. <br /> <br />• <br />Stockpiling is known to produce a degradation in the quality of soil. If <br />stockpiling is done, the soil should be protected with a cover crop of quick <br />growing grasses, preferably with one or more of the species to be used in the <br />revegetation process. <br />Replacement depth should be a minimum of 8" over areas where subsoils can be <br />replaced to some depth. Over any remaining gravel or over exposed Pierre Shale, <br />the depth should be about 10" to 19" minimum, however, the depth of topsoil should <br />not exceed 18" or the value of the topsoil may be wasted. <br />Revegetation should be done as soon as possible after replacement of the <br />• <br />soil. Species used in the revegetation should be rapidly growing grasses. <br />Legumes should be limited to a maximum of 1 pound per acre pure live seed. <br />Included should be some of the natives including such species as Blue Drama, <br />Western Wheatgrass, and Side-oats Drama. <br />page 7 of 7 Exhibit I <br />