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0 <br />Erosion Control - Water Quality <br />The control of water movement over the pit during storm events and <br />snowmelt is critical to preserve remaining topsoil, prevent sedimentation off <br />the pit location, and maintain water quality of any runoff. The berm along <br />the southwestern boundary of the pit should be maintained (Photo 6). <br />Having observed the pit during a substantial rain fall, no apparent problems <br />were noticed given the current conditions. However, if operations began to <br />remove large quantities of material, we suggest implementing one or more of <br />the suggestions found in Appendix A. They include: <br />• Water bars <br />• One Rock Dams (ORDS) <br />• Straw based products such as blankets and wattles. <br />• Rock mulch <br />• Timely seeding of disturbed locations <br />Singularly or in combinations the listed methods will help reduce erosion plus <br />some encourage germination and enhance plant growth. Additionally, a well <br />planned and timely phased reclamation will help until the pit is abandoned <br />and mining ceases. <br />A planning horizon of one-two years is a reasonable time frame to determine <br />if it is no longer economically feasible to mine an area with reclamation to <br />begin no later than five years after mining ceases. This is suggested with the <br />understanding that the reclaimed area may be mined again if it becomes <br />economically feasible, and as such will need reclaiming again. Amendments <br />to the permit and reclamation plans maybe required to re -open an area that <br />is under final reclaim. <br />Control of erosion will help maintain the quality of the water that moves <br />across the pit. <br />341 Page <br />1Olt: 1'OWELL GRAVLI. I'll'.'vl'iFA DIL.Sr:1 RAN('11 <br />BY: GRLA BASIN LNVIR ?NNILN I AL AND N1:UA I R-) - INVY V.Gltl %I BAYNI NV I'L.{"OM <br />