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r <br /> XXI. Sealing of Drill Holes and Underground Openings - <br /> Rules g and 4.01 <br /> The specific findings required under this section which were made in the <br /> July, 1987 Findings Document (Renewal ) have not been modified by the <br /> proposed revision, and those findings remain applicable. <br /> The operation is in compliance with the requirements of this section. <br /> XXII. Subsidence - Rules 2.05.6(6) and 4.20 <br /> Information submitted with proposed PR No. 2 indicates there is one <br /> structure, the Huntington Irrigation Ditch, in the permit area that has <br /> the potential for mine related subsidence impacts. Impacts on this <br /> structure will be monitored by quarterly inspections of the ditch, <br /> quarterly visual inspections for evidence of subsidence features within <br /> the permit area, and a semi-annual survey of subsidence monuments . <br /> Repairs, if necessary, will be effected by the operator for the ditch and <br /> have the approval of the surface landowners. <br /> No renewable resource lands lie within the permit area. Information <br /> provided in the application indicates that the Pine Gulch drainage, which <br /> at one time was suggested to be a renewable resource area, does not in <br /> fact qualify as one. There is no aquifer or recharge area for an aquifer <br /> in the Pine Gulch area. Core hole data supplied with the application <br /> demonstrate that the bedrock section above the level of the coal is dry. <br /> The survey of wells and springs in the area of the mine has established <br /> that the water supplied by these for beneficial use is from <br /> strati graphi cal ly lower aquifers or from alluvial aquifers whose recharge <br /> areas do not include Pine Gulch. The Pine Gulch area is also not one <br /> utilized for agricultural or silvicultural production of food and fiber <br /> nor does it serve as a pasture land. The confluence of Pine Gulch and <br /> Hay Gulch approximately three miles downstream from the mine was <br /> determined to be an alluvial valley floor on which agricultural <br /> activities are conducted. These activities however, do not rely on the <br /> surface or ground water resources originating in the Pine Gulch area. <br /> Provisions of the proposed mining plan, furthermore, will minimize any <br /> potential for mining related subsidence impacts on the Pine Gulch <br /> drainage. Elongated pillars will be employed to support all passages <br /> under the drainage. These pillars will not be extracted during final <br /> retreat. As a result, the Pine Gulch drainage area will be assured of <br /> continued long term stability. <br /> The proposed operation is in compliance with the requirements of this <br /> section. <br /> XXIII. Special Categories of Mining Other Than AVF and Prime Farmland - <br /> Rules and 4.29 <br /> The specific findings required under this section which were made in the <br /> July, 1987 Findings Document (Renewal ) have not been modified by the <br /> proposed revision and those findings remain applicable. <br /> The operation is in compliance with the requirements of this section. <br /> -11- <br />