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the direction of, and certified by, a qualified registered professional engineer. The plan <br />demonstrates compliance with the performance standards of Rule 4.05.3 (ephemeral <br />streams draining less than 1 square mile). The detailed design plan includes peak flow <br />calculations, representative cross sections indicating design-storm water levels, <br />calculation of design-storm flow velocity for the range of slopes encountered in the <br />diversion, a longitudinal profile of the diversion, and identification of the nature of the <br />material into which the diversion is excavated. <br />It has been mentioned that the greater portion of the total overburden is sandstone rock, <br />which will be relocated fast in the pit. Therefore, compaction of the spoil will be <br />accomplished with this equipment while in the process of backfilling. Of course, <br />substantial quantity of the rock will be fragmented into sufficiently small pieces to fill <br />between the larger fragments. Along the way, the consolidated material will be <br />substantially compacted to provide a stable sub-strata base. The unconsolidated spoil <br />will then be placed on top of the rock, followed by soil respreading as detailed in <br />Section 2.05.3(5). <br />The rock being placed in the bottom of the pits, will essentially be forming a rock <br />blanket which will progressively settle down to form an overall stable site. The <br />unconsolidated spoil will, likewise, be compacted by the equipment as it is distributed <br />over the reclaimed area. The unconsolidated spoil will be redistributed as much as <br />possible with a scraper, but will be hauled by truck and spread with a dozer in areas <br />too steep for a scraper. The waste will be spread for dilution with overburden to <br />eliminate any potential for combustion potential. (See Protection of Hydrologic <br />Balance Section). The final grading of the topsoil will be accomplished with a <br />Caterpillar 12T motor grader or equivalent. <br />Compaction of the topsoil will be minimized as much as possible while being <br />redistributed. It will then be scarified (loosened) to bind it to the subsoil/base earth <br />material, and immediately protected with crimped-in straw mulch. Map 5-4 and <br />Geologic Cross Sections A through X illustrate the fmal surface configuration of the <br />proposed permit area, in accordance with Section 4.14. The ephemeral stream <br />(drainage) channel reconstruction is also illustrated on Map 5-4 in accordance with <br />4.05.4. The stream channel will be reconstructed in a fashion to dissipate the velocity <br />of water. Original grade is 7 to 8 percent. A lower portion of the realigned channel <br />may be fractured with explosives to ensure proper grade. Reclamation costs reflect <br />blasting labor, drilling and dynamite costs. <br />The regraded spoil will be monitored with a spoils monitoring program to insure <br />stability of the regraded surface. A survey pin will be established and surveyed <br />annually to insure the spoil is not moving. The location of the pin will not be <br />established until the spoil is regraded. <br /> <br />Technical Revision OS (v 1.3) 5-24 Revised 9/1997 <br />