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r M <br /> <br />M <br />Mr. Stevan L. O'Brian - 2 - October ?0, 1987 <br />(6). The Division actively encourages operators to stabilize topsoil <br />stockpiled longer than one growing season with an appropriate seed mix. <br />Page 12 of the permit document indicates that a vegetative cover will be <br />established on long-term topsoil stockpiles, however the specific seed <br />mixture should 6e included in the permit application. <br />(7). In order to help ensure that re vegetation efforts will be successful, <br />the operator should commit to a minimum topsoil reapplication depth of <br />six (6) inches. <br />(8 ). The proposed reclamation seed mix could be greatly enhanced by the <br />addition of Cicer Milkvetch (1.0 LBS PLS/ac.). As noted in Exhibit H, <br />shrubs, such as mountain mahogany, should be planted on north facing <br />slopes to enhance the post-mining land use (suggested application rate <br />of 0.1 LBS PLS/ac). <br />{9), The Division has reviewed the reclamation cost estimate contained in <br />Exhibit L. In general, the Division concurs with the estimated cost of <br />reclaiming the site. However, the Division has three concerns (A). the <br />estimated cost of reseeding should be updated to include cicer milkvetch <br />and mountain mahogany; (8). the assumptions upon which the reclamation <br />estimate is based, must be written into the permit as mining <br />commitments; (C ). in order to determine if the projected cost of grading <br />and shaping is accurate, the mining plan should clearly state whether a <br />vertical, 1:1 or 2:1 highwall will be maintained during mining <br />operations. The configuration of the highwall will be an important <br />factor in determining the cost of reducing the slopes to the final grade. <br />If you have any questions or comments, please contact me. <br />Sincerely, ,~'7 <br />/~ <br />-~~_~= ~ - <br />r <br />Steven f,. Renner <br />Hydrologist <br />SGR/bdc <br />2952E <br />