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It has been determined that slopes above elevation 5800 ft will have the most public visual <br />impact. Therefore, slopes above elevation 5800 ft will be developed by leaving intentional short <br />breaks in the highwalls and leaving diagonal haul roads in place to break up the horizontal lines <br />created during standard highwall and bench mining (see Exhibit D-1). This method of <br />reclamation will present a more aesthetically pleasing alternative than backfilling continuous <br />benches. The benches will be backfilled with overburden material at a slope ranging from <br />1.SH:1V to 1.75H:1V depending on the backfill material and the degree of compaction. Where <br />and when final benches are available for backfill, overburden will be placed on the bench, <br />shaped, and graded. Minor instability in the backfilled slopes should only be surface instability <br />and minor slides will also help to produce a more natural looking slope. In some locations, <br />unavoidable, localized, minor blocks and wedges will likely slide from the highwalls and <br />benches which will serve to further break up the symmetry of mining and create more natural <br />looking reclaimed slopes. As vegetation is redeveloped the surface will become more stable. <br />Slopes below elevation 5800 ft will not be backfilled as they will be underwater when the pit <br />becomes used as a water storage reservoir. If necessary, some point-plugging of any leakage <br />will be performed through grouting, although no major grouting is anticipated. <br />Grading <br />Grading of fill material will be performed on benches at elevation 5800 ft and higher. hi general, <br />fill material will be graded to slopes appropriate to the soil type and terrain of the area. Slopes <br />will be graded to minimize erosion and to facilitate revegetation. Backfill at the stated slopes <br />will not completely cover the highwalls, and the upper portions of the highwalls will remain as <br />highwalls. The maximum graded slopes will vary between 1.5:1 and 1.75:1 (horizontal:vertical). <br />Final grading will create a surface that is variable and somewhat irregular to give a more natural <br />appearance while effectively carrying away drainage. <br />Schedule <br />Table E-1 shows disturbance areas per mining phase and estimated time periods for each phase <br />based on assumed future production rates. As was stated above, reclamation will be performed <br />on an on-going basis; as such the disturbed areas at any point in time could vary for these <br />estimates. <br />Table E-1 Disturbed Lands <br /> <br />Phase Disturbed <br />Area <br />(acres) Reclaimed Area <br />During Phase <br />(acres) Estimated <br />Time Frame <br />(years) <br />I 15.0 2.3 5 <br />II 32.0 9,2 6 <br />III 46.9 17.2 6 <br />IV 15.4 48.8 8 <br />Post Mining ----- 31.7 5 <br />TOTALS 109.3 109.3 30 <br />Range Aggregates, LLC- Parkda(e Quarry <br />DMG 112 Permit Amendment <br />Pnge 22 <br />