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The monitoring system will involve the placement of several monitoring <br />• control stations. These control stations will consist of a pipe or <br />rebar, anchored firmly in place, with a survey cap identifying each <br />station. The bottom of each station will lie below the frostline. <br />Where conditions permit, rebar will be driven into bedrock. Elsewhere, <br />an iron pipe or rebar will be set in concrete. Rebars will be <br />five-eighths inch in diameter and will extend to a depth of at least <br />three feet beneath the ground surface. <br />The monitoring stations will be established over the area to be mined by <br />the Coal Gulch Mine before mining activities begin. In areas of active <br />mining, each station will be surveyed and visually examined each spring <br />and fall. Final survey will be carried out one to two years after the <br />coal has been removed beneath the monitoring station. Semi-annual <br />monitoring will be implemented in lieu of quarterly monitoring because <br />of the adverse weather conditions and accessibility to the area above <br />the coal to be mined. Reports will be supplied following monitoring to <br />• the Division. <br />If the subsidence monitoring program determines that the subsidence <br />prediction was inaccurate and that material damage or diminution of <br />reasonably foreseeable use of renewable resources may occur, Peerless <br />Resources, Inc. will submit a subsidence control plan for approval by <br />the Division. <br />Subsidence Su <br />Peerless Resources, Inc. proposes to use a room and pillar technique at <br />the underground operation. The details of the planned mining are set <br />forth in Section 2.05.3. Mining will be conducted according to the <br />sequence graphically shown on the Mine Plan Map (Map 11). <br />The geology of the area is set forth in Section 2.04.6. Site specific <br />stratigraphy is shown on the Regional Geology Map (Map 5). <br />• <br />2.05-46 <br />