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' ; ENGINEERING &. SURVEYING GOAAPAPIY <br />., <br />674 • 443 DODGE DELTA. ~~COLORADO, 81416 30~-874-7593 <br />7881-85 <br />Slope Stability, <br />Augustaib,.,1.985~ <br />1 <br />Mined Land Reclamation. <br />423 Centennial Euilding; <br />1313 Sherman Street <br />Denver, Colorado. 80203 <br />ATTN: Randall Price. <br />RE: Bear. Coal Company <br />' bear. Mine No.. 2 <br />Bsar .Mine,. Nq. 3 <br />S1,ope Stability Monitoring. <br />auc 2 0 ~sa~ 111 Ii <br />~CZ Inc. <br />We completed monitoring.of,the three stations on Bear No. 2 <br />with the following..results: <br />Station X Y ~ <br />~.U-13 4288.564 3504.810 b11S.`i06 <br />U-14. 4480.bA9 3610.149 b087,900 <br />U-15_ 4476.4b7 3894.999 6104.246 <br />Deviation from the 1984 readings are; <br />Station ori-. ert. <br />U-13 0.315 0.514 <br />U-14.. 0.610 O. 1 ~O <br />U-15 0.74,2 O, 2v4 <br />Regarding the above deviations, we monitored this year with a <br />more.. experienced crew_a~d different equipment than was used <br />last year.. .We f.eel.most.af the discrepancies can. be <br />accounted for in quality, of.f.ield work and accuracy of <br />equipment-.. This-.is anl,y the second year these stations have <br />been.monitpr.ed. AGCUmulatiort.of data will furnish a better <br />base..an,which to detect movement. <br />Stations.U-13,,U-1'4;apd U-15 have been replaced with new <br />monuments consisting, of, 3-inch diameter steel pipes with a fl- <br />inch square top.a~d a 5/8-inch bolt. These new monuments <br />will be used for= a}l, subsequent s1opQ stability monitoring on <br />Bear Mine No. 2. The; stations and coordinates are as <br />follows: <br />