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suprise if the pond we have even fills up with WATER. <br />The mine yard area is hydrologically separated from <br />• Trout Creek. See section 2.05.3. <br />No pesticides are used in our operation. <br />(3) Protection of the Hydrologic Balance <br />This information is contained in section 2,05.3. <br />(4) Does not apply. <br />(5) Does not apply. <br />(6) Subsidence <br />Primarily because of the high percentage <br />(approximately SOY,) of thick and competent sandstone <br />members in the total cover over the mineable coal reserves <br />in the permit area, subsidence reaching the surface will be <br />of a minimal amount. <br />This is dramatically evidenced by examining large, <br />totally extracted pillared areas in the old Apex /A1 Mine. <br />On several occasions within the last few years these old <br />pillar areas have been examined and the height of the cave <br />in all pillared areas is limited to the base of a 19' thick <br />sandstone which overlays the lower Pinnacle seam by 10 <br />feet. Several of these pillared areas have been standing <br />• for 35 years. No evidence of surface subsidence is visible <br />above either the abandoned 111 or the currently active 112 <br />Apex Mines. <br />Recent pillaring experience in the 112 mine typically <br />consists of large exposure areas (typically 5000 to 10000 <br />square feet) of unsupported roof being exposed prior to the <br />first fall. Following the initial fall, the cave becomes <br />quite controllable and predictable, but never exceeds 10 to <br />12 feet in height. <br />There is only one permanent 'structure located on the <br />permit area which has recoverable coal reserves benBath it. <br />This structure is an old ranch house which is occagionally <br />used by its owner as a weekend vacation cabin and is shown <br />on the accompanying subsidence map. This structure will be <br />protected (as described in the Emling report following) by <br />limiting extraction to SOY,. <br />A considerable portion of the proposed undBrground <br />workings are overlain by rugged and brush covered areas <br />which are decidedly of submarginal agricultural utility and <br />are not being utilized presently in any agrarian mangler. <br />- Primer to the extraction of any zone 113 reserves the <br />following subsidence monitoring system will be implemented: <br />1.) With the consent of the surface owner in this area, a <br />grid of at least 8 permanent and low relief Concrete <br />monuments will be constructed (5 monuments on the <br /> <br />Os/~B 181 <br />189 <br />