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7-17-1997 3:20AM FROM ENVIRONMENTAL 9708702753 p_3 <br />Drilling. Methods and ui ment: Exploration holes will be established with arubber-tired truck- <br />mounted air/foam rotary drill. Drilling mud may be employed th the drilling medium. Previous <br />drilling activities in the immediate azea have not encountered water-bearing formations producing <br />any appreciable quantities of water from the strata overlying the coal seam of interest. Both the <br />Twentymile Sandstone and Wadge Overburden have been documented to contain water, however, <br />neither typically exhibits sufficient head to produce flows at the surface. Drill hole depths <br />projected for each site are specified on 1997 NOI Table 2. After drilling the holes will be logged <br />with a standard suite of geophysical data logging instruments. No holes aze planned to be <br />developed as water wells. Exploration holes will be sealed with cement grout installed with the <br />drilling rig to within 3' of the surface. Drill cuttings will be used to backfdl the uppermost 3` of <br />each hole. Tn the event site 97011 is developed, up to six drill holes will be established on [Iris pad <br />in order to define particular geologic features in the area. <br />In reference to hole 97001, surface casing will be set 10' below bedrock to ensure drilling fluids <br />are not lost in the surfacial soils. The surface casing will be grouted inplace and then the hole will <br />be advanced as per normal methods. The hole is relatively shallow as compared to other holes <br />drilled at the property and mainly will be advanced through the Marine Shale. Therefore, TCC <br />does not anticipate encountering any large volume of water. The Wadge Overburden may produce <br />a minor amount of water that can be contained within the mud pits. The coal will be cored and the <br />hole gcophysically logged. Upon completion of the coring and logging the hole will be tremie <br />grouted through and twenty feet above the Wadge Overburden. From that point up it will either be <br />grouted or backfllled with cuttings to within ten feet of the surface. The interval from ten feet to <br />within three feet of the surface will be grouted and then the remaining three feet will be backfilled <br />with soils. The surface casing will be cut off three fee[ below the surface or it may be removed <br />entirely from the site. The hole will be marked as discussed previously. <br />Reclamation Plan: Reclamation activities will begin once mud pits are sufficiently dry to allow <br />regrading of each site to occur. Materials excavated Cor the mud pits will be redistributed over the <br />site, stockpiled topsoil will be respread, and broadcast seeding will occur over the entire disturbed <br />area using the following approved pastureland seed mixture from Permit No. C-82-056. Newly <br />constructed segments of access road will be reclaimed in a similar fashion with stockpiled topsoil <br />respread and disturbed areas broadcast seeded. <br />Species <br />Seeding_Rate (PLS Ibs/acre) <br />_ Slender Wheatgrass 2.0 <br />' Intermediate Wheatgrass 2.0 <br />Pubescent Wheatgrass 2.0 <br />Desert Wheatgrass 1.5 <br />Orchardgrass 0.5 <br />Timothy 0.5 <br />Regar Meadow Brome 0.5 <br />Lincoln Smooth Brome I.0 <br />Alfalfa 0.25 <br />Cicer Milkvetch 0.25 <br />Total 10.5 <br />I:\dacumentUcarl\97 not <br />