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Drainage Control <br /> 1. Because the operation is a closed pit, there really isn't much of anything to be done in <br /> the way of drainage control, except possibly at the very end of the operation. <br /> 2. All wash ponds and any basins where any ground water is exposed will be filled as a <br /> part of the reclamation. <br /> 3. Currently water that collects near the highwall infiltrates into the gravels remaining on <br /> the floor of the pit. <br /> 3. At the conclusion of the operation two options exist. <br /> A. If a graded slope is created at the end of the operation then there will need to be <br /> a determination as to whether drainage into the underlying gravels is sufficient <br /> to empty collected water in accordance with the time allowed by water law and <br /> rules and regulations at that time. Currently the time is 72 hours. <br /> B. If that cannot be achieved at that time, then a drainage outlet or other provision <br /> will need to be established that would appropriately remove the water in the <br /> required time period. <br /> Final Grading and Planting <br /> FINAL GRADING: <br /> 1. Prior to revegetation,the 3:1 slopes may need to be smoothed a bit. This is <br /> probably best done by discing depending on how rough the surface is,how <br /> sealed(hard)the surface is, and how much erosion has occurred since the slope <br /> was created. If it is rilled and gullied extensively, then partial regrading of the <br /> slope may be necessary to get a fairly even and loose surface. <br /> 2. If the slope has been recently created then discing once may be all that is <br /> necessary or perhaps if loose enough simply proceeding with planting. <br /> 3. Although broadcast seeding these slopes is possible if the surface is fresh it is <br /> best to drill the seed in this climatic zone. Also broadcasting requires twice as <br /> much seed as drilling and seed is expensive these days. <br /> SEEDING THE GRADED LAND: <br /> 1. As stated above, drill seeding is best for this area and should best be done <br /> within a few days of Final Grading. <br /> 2. No fertilizer or mulch will be used for these soils as prior experience shows <br /> they are moderately fertile as they are. <br /> Fountain Pit Technical Revision#3 - June 2022 M-1982-155 Reclamation Plan Page 5 of 23 <br />