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A monitoring program will be implemented following secession of min- <br />ing with periodic visual inspections of the surface to the mine plan area to <br />be made. <br />Blue Flame Coal Mine will adopt the 21 degree angle of draw and a max- <br />imum overburden thickness figure of 300 feet proposed by the Division. It may <br />be expected that subsidence features will be expressed on the surface up to 115 <br />feet away from the barrier pillar after mining is completed. The permit bound- <br />ary, i.e., the areal placement of the barriers, has been modified to ensure a <br />115 foot subsidence buffer. <br />Blue Flame Coal Mine has identified the Huntington ditch as the only <br />renewable resource existing on the surface above the permit area. Blue Flame <br />Coal Mine has submitted a detailed map which overlies the mine plan. This map <br />accurately depicts topography, existing roads, the Huntington ditch, ephemoral <br />drainages, any existing structures and the subsidence monitoring points as <br />described in the following two paragraphs. <br />• The proposed subsidence monitoring stations have been modified to ac- <br />curately quantify movement. The proposed Southernmost point, point number 2, <br />has been moved 200 feet West so it will not be affected by the inactive work- <br />ings of the old mine. A fourth monitoring point, point number one, has been <br />established 250 feet East of the West permit boundary line and 110 feet North <br />of the South permit boundary line. The Northernmost monitoring point, point <br />number 4, has been moved 350 feet West of its proposed location. Point 3, the <br />Northwesternmost point has not been changed from the proposed location. <br />One reference point has been established off any areas potentially <br />affected by subsidence. Blue Flame Coal Mine has adopted the Division's rec- <br />ommendation that this monument be established at least 130 feet South of the <br />face of the old mine workings. <br />Monitoring of the subsidence monument network will take place at least <br />twice prior to any underground development work in order to establish a base <br />line data. This monitoring will take place after the Mined Land Reclamation <br />. Division permit has been obtained and previous to approaching within 115 feet <br />in any direction of any subsidence monument. <br />~~1 ~N 3 F'.....~,. ~ af_ K . io <br />'.i ~ b S•a.:... c.t ...:... .n <br />