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1' • • <br />Mr. L. Otto Goemmer <br />.Tune 15, 1982 , <br />Page -2- <br />Exhibit B 6 C (cont'd) <br />3. How will the irrigation ditch to the east of the pit area be <br />protected during and after mining? Is the ditch within the proposed <br />7.5 acre permit area? How will the crossing of the ditch by the haul <br />road be designed? <br />+4. Will this operaCion be wet or dry? If the pit is to be mined <br />1~ dry, to what elevation above the water table will the pit be mined? <br />5. All topsoil stockpiles should be seeded with a perennial grass <br />(cover crop (such as Western wheatgrass at a broadcast rate of 6.0 <br />J lbs. PLS/acre) for purposes of stabilization against wind and water <br />erosion. <br />Exhibit D <br />1) Water Resources <br />a) What is to be the source of water for this operation for <br />W wk Cif such items as product processing and dust control? An industrial <br />SY..P. use water right will be required for water for such uses. How <br />much water will be used for these purposes? <br />J b) Will the mining of this pit expose groundwater? <br />2) Wildlife <br />a) The original evaluation by the Division of Wildlife was For <br />L-~t,f,°, ~d~~ a mining operation that was to last one year. It now appears <br />lac;Fr' that this operation is to last twelve (12) years. Has the <br />~' Division of Wildlife been informed of the change in plans? This <br />could modify their recommendations. Please clarify this situation. <br />b) Is a watering hole for wildlife planned as a part of the final <br />v reclamation (as recommended by the Division of Wildlife)? <br />F.xh ihit F. <br />1. For success in reclamation when topsoiling and revegetation is <br />involved, slopes of 2:1 are usually somewhat extreme. Leaving back <br />slopes of 3:1 or less would allow revegetation to occur more quickly and <br />make the probability of erosion less. Therefore, I recommend leaving <br />such a gentler back slope to the pit. If the pit back slopes are left <br />at 2:1, some erosion control measures such as cross-slope berming may <br />be necessary. <br />2. Presumably the seeding rates given in the revegetation mix are <br />broadcast rates. Please clarify this matter. Furthermore, typically <br />drilling of seed is a more effective way of ensuring revegetation success <br />quickly. I therefore recommend that, if the rates given are broadcast <br />rates, the rates be halved and the seed be drilled or, if the seed is <br />broadcast, the seedbed should be raked afterward to make sure the <br />seeds are covered. <br />