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<br />The software program analysis produced the information for <br />Table 3 and Figure 3. The structure was treated as a square <br />80 feet by 80 feet because of the "L" shape of the <br />buildings. The main house is approximately 30 feet wide and <br />65 feet long (MKA report). I added an arbitrary 15 feet to <br />the length and treated the total area as an 80 foot square. <br />The calculated "Angle of Draw" from the mine entry is 29 <br />degrees. The "0" point of movement is 128 feet from the <br />edge of the defined Protection Area (which is approximately <br />65 feet from the main structure) (Figure 3). Therefore the <br />south side of the main house is approximately 193 feet from <br />the "0" point of calculated surface movement. Figure 4 is a <br />map of the mine, showing the location of the surface <br />features of concern. A - A' on Figure 4 is the location of <br />the cross-section depicted in Figure 3. The footage <br />measurement shows the point of calculated surface movement <br />using the Profile Function. Experience has shown that <br />structural damage starts between the 0.1 foot subsidence <br />line and the 0.5 foot line, increasing in intensity as one <br />approaches the mine. <br />An important point is that all of the surface is in tension, <br />pulling towards the mine. That is, the effect on surface <br />structures is a pulling of the foundation towards the mine. <br />Any cracks in a structure experiencing this type of stress <br />would be open wider at the base and become narrower upwards. <br />The Golden Eagle Mine established a subsidence monitoring <br />net across the 3 North entry in 1988. Figure 5 is a plot of <br />the movement of the stations between March 1988 and <br />September 1993. The 3 North entry has identical pillars and <br />mine opening sizes as the 1 North entry--the entry of <br />concern at the Tatum Property. The geology of the <br />overburden and depth to the mine is approximately the same. <br />Therefore, the expected amount of movement over time at the <br />1 North entry would be very similar to that measured at the <br />3 North entry. The surface elevation deviation measured by <br />the company is insignificant and within the normal variation <br />expected and found in surveys of this type where no surface <br />subsidence has taken place. <br />iiydrology <br />A question was raised by the Tatums about the impact of the <br />entry flooding on the potential of pillar failure. Also <br />questioned was whether or not the water draining into the <br />mine had an impact on the surface. <br />Information supplied by Larry Sennett (Basin Resources, <br />Golden Eagle Mine) indicates that the water flowing into the <br />1 North entry is coming from the coal face and the immediate <br />5 <br />