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2.05.6(6) <br />Subsidence Monitoring <br />Monument <br />Location <br />Frequency <br />Purpose <br />Aqueduct & <br />To measure subsidence if any along the <br />PL -08 to PL -29 <br />Stevens Gulch <br />Quarterly <br />Pitkin Mesa Pipe Line & Stevens Gulch <br />Road <br />Road. Monitoring to Begin One Year <br />Before Longwall Mining in the Area <br />To measure subsidence if any to Turkey <br />43 -A, B & C <br />Turkey Track <br />Quarterly <br />Track Structures. Monitoring to Begin One <br />Structures <br />Year Before Longwal I Mining in the Area <br />Longwall Mining Projected in 2016 <br />To measure subsidence, if any, on <br />SGA to SG -14 <br />Stevens Gulch <br />Quarterly <br />Stevens Gulch Road. Monitoring to Begin <br />Road <br />One Year Before Longwal I Mining in the <br />Area <br />To confirm/refine the subsidence <br />predictions for the area. Longwall <br />mining projected 201612017. The initial <br />WT -1 thru 10 <br />survey will be conducted and the data <br />& <br />West Fork <br />Semi- <br />submitted to the Division at least six <br />Terror Creek k <br />Annual <br />WT -11 thru 17 <br />months prior to longwall mining <br />beneath the area, and semi - annually <br />thereafter. <br />Longwall Panels <br />To be <br />within the <br />Verify the maximum subsidence <br />determined <br />Spruce Stomp <br />Quarterly <br />prediction. <br />Lease <br />Verify the predicted change in slope of <br />West Terror Creek using Lidar aerial <br />surveying. First survey will be <br />None <br />West Terror <br />2 Times <br />performed after longwall mining is <br />Creek Flow Line <br />complete under the creek. Second <br />survey will be performed two years <br />after longwall mining is complete under <br />the creek. <br />PR -14 2.05-178- 09/14 <br />