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of topsoil, If a burial option is the preferred reclamation technique, from where will <br />the material come? <br />33. Enumerate the utility poles at the mine site, and estimate the cost of their removal. <br />34. Compaction of road surfaces at the Sales Office and at the. Mine Site necessitates <br />more significant dispersion of the soil than that created by scarification. Commit to <br />ripping those surfaces to a depth of two feet and modify the bond calculation <br />accordingly (Rules 4.03.2(7)(a)(iv) and 2.05.4(2)(b) and fell. <br />Miscellaneous <br />35. Please revise the Table of Contents in Volume 2 to reflect all of the maps in the <br />permit, and their most recent revision date. This will improve the public <br />accessibility to this permit application, and ensure that all copies of the permit <br />application are the same. <br />II. Summary of Revision and Permittino Activity 17/87 - 12/921 <br />In the past five years, there has been little permitting activity. A listing and brief <br />description of the permitting actions follows in chronological order. <br />1. Minor Revision 4: Submitted 9/9/88; conditionally approved 9/9/88. <br />Relocation of the shop and office building. <br />2. Permit Renewal 1: Submitted 6/6/89; conditionally approved 4/30/90. <br />The permit renewal clarified the reclamation plan, modified the Probable Hydrologic <br />Consequences Section, updated the permit and compliance portion of the permit <br />and re-worked portions of the surface water control plan. <br />3. Technical Revision 3: Submitted 2/20/90; conditionally approved 8/28/90. <br />This revision permitted a waste disposal area at the Twin Pines Sales Office. <br />4. Technical Revision 4: Submitted 7/22/91; approved 12/22/92. <br />The revision approved designs for an open channel emergency spillway on the <br />lower pond and accepted documentation that the upper pond was adequately sized <br />to contain the runoff from a 25-year 24-hour storm event. <br />5. Minor Revision 5: Submitted 8/19/91; approved 9/10/91. <br />This revision authorized coal exploration drilling of three to four holes in the permit <br />area. <br />6. Minor Revision 6: Submitted 7/16!92; conditionally approved 7/16/92. <br />This field minor revision modified roadside ditch construction specifications. The <br />Division received the stipulated page modifications on 9/14/92 and accepted them <br />on 9/16/92. <br />Twin Pines Mid-Term Review 6 January 13, 1993 <br />