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MINING PLAN <br />will rebuild a dry zone between the moist sand and the surface to help insure that ground water is not <br />exposed. Although this soil layer may, in time, become moist that will only aid in the growth of the <br />desired final vegetation. <br />The final result of this approach to the mining will produce a rather gentle west facing slope <br />that starts at the eastern end of the area mined (roughly 100 feet east of the current upper water zone <br />extraction wells) and extends westward to meet the nearly flat bottom of the existing pit in the vicinity <br />of the current permit boundary. It is estimated that at least 80% of the sand to be removed from the <br />Little Johnson area will be contained in the land between the current mining limit (west of the current <br />permit boundary) and the upper zone extraction wells. <br />Finally, it is important to recognize that the LJR groundwater extraction wells, their associated <br />underground power line and underground water pipeline to the treatment plant will all be removed as <br />a result of mining. This is fully acceptable to the remediation program as evidenced in documents <br />elsewhere in this amendment. The Bradley Road groundwater extraction system (wells, power, and <br />pipelines) will not be affected by this mining as they are all located well away from the mining area. <br />NORTH END OF LITTLE JOHNSONAREA: Mining the north end of the Little Johnson area <br />must be done with considerable care to avoid affecting the ditch comdor and to produce a slope that <br />would be suitable as a possible final slope. Although the reclamation plan maps show this area as a <br />temporary reclamation area, the mining must assume that the appropriate temporary reclamation will <br />become the permanent reclamation. <br />No mining can occur north of a line 50' south of the current ditch alignment. The final slope <br />created in the mining will be 3:1 or less steep. The final slope will not be created by backfilling a <br />steeper slope. <br />In the event a reservoir is created in the Little Johnson area, this slope will form the northern <br />edge of the reservoir. Therefore, the material here needs to be native, undisturbed material to maintain <br />the highest integrity of the slope. <br />On the other hand, if the reservoir is not created and the ditch is relocated as described in the <br />current permitted plan, then this slope and the ditch comdor will be mined through at some point in <br />the future. But that mining cannot occur until a decision is made regarding the construction of a <br />reservoir AND the ditch is relocated. In the event this area is removed, then it will most likely be <br />removed as part of the Phase Se mining and not the Phase 4e mining. <br />The mining of this area must be consistent with the MOST limiting possible future use. <br />Clearly, an assumption that the reservoir will be built is the most limiting future use. If the reservoir is <br />built, then the sand on the north end of the reservoir site will need to be in place, in an undisturbed <br />condition, to accommodate that possible future use. All other future final land uses that are being <br />considered at this time are less limiting on the future extraction of this sand than the reservoir. <br />Daniels Sand Pit #2 -Little Johnson Amendment - nn-1s73-om Exhibit D Page 7 <br />