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<br />• SUBSIDENCE MONITORING PLAN <br />E-SEAM LONGWALL PANELS 1 EAST AND 2 EAST <br />This Subsidence Monitoring Plan (Plan) outlines the monitoring <br />program to be followed for the 1 East and 2 East longwall panels <br />in the E-seam. This Plan is designed to verify the subsidence <br />predictions for draw angle and maximum subsidence contained the <br />Permit for the No. 6 Mine longwall panels. <br />1.0 Monitoring Points <br />This Plan utilizes both existing and new monitoring points. Not <br />all of the existing monitoring points will be monitored under this <br />Plan. Figure 1 illustrates the locations of existing subsidence <br />monitoring points with respect to No. 5 Mine workings (F-seam) and <br />No. 6 Mine workings (E-seam). Figure 1 also shows generalized <br />overburden thickness contours for No. 6 Mine. <br />A projected zero-subsidence contour was used to determine which <br />monuments would be monitored under this Plan for mining of 1 East <br />and 2 East longwall panels. This projected zero-subsidence contour <br />is shown on Figure 1. It is based on the anticipated 19 degree <br />draw angle plus a 6 degree buffer factor. Cyprus Empire will <br />monitor parts of existing lines "A", "B", "C", "D", "S", and "T". <br />Specific points to be monitored are listed in Section 2.0, <br />• Monitoring Schedule, of this Plan. <br />New monuments will be constructed to extend monitoring line "B". <br />These new monuments will be constructed on 50-ft centers along the <br />orientations shown on Figure i. Monument construction will conform <br />to the requirements and specifications contained in the Permit. <br />2.0 Monitoring Schedule <br />It is the intent of Cyprus Empire to provide monitoring under this <br />Plan of potentially affected monuments on a quarterly basis. <br />However, this monitoring schedule will be modified as necessary to <br />accomodate weather conditions. <br />Monitoring of any given point will continue until two successive <br />surveys indicate subsidence has ceased. Monitoring of a point <br />satisfying this criteria will then be discontinued. <br />2.1 Quarterly monitoring, 1 East Longwall <br />(a) Lines "S" and "T", monuments S1 through 517 and <br />T1 and T2. Monitoring to commence no later than <br />when the longwall face is 800 ft from <br />monument T2. <br />• (b) Line "C", monuments C1 through C13. Monitoring <br />to commence no later than when the longwall face <br />is 630 ft from monument C13. <br />Ex 44-2 <br />