Laserfiche WebLink
SUBSIDENCE MONITORING DATA <br />Semi-annual Report, July -December 1991 <br />Twentymile Coal Company, Foidel Creek Mine <br /> Surve Eleva tions ft <br /> Pre-mining Previous <br />Map23A Profile Elevation Report Subsidence <br />Point Distance Northin Eastin ft 6/10/91 8/23/91 12/03/91 This Period Total <br />B-Series Line (perp endicular) <br />B-22 0 41951.3 12226.2 6822.8 6822.8 6822.9 6822.7 -0.1 -0.1 <br />B-21 50 41903.3 12227.9 6825.2 6825.2 6825.3 6825.0 -0.2 -0.2 <br />B-20 100 41852.6 12228.6 6826.6 6826.6 6826.7 6826.5 -0.1 -0.1 <br />B-19 150 41803.7 12227.9 6829.1 6829.2 6829.3 6829.0 -0.2 -0.1 <br />B-18 200 41752.8 12230.5 6831.5 6831.7 6831.7 6831.5 -0.2 0.0 <br />B-17 300 41654.0 12230.3 6835.6 6835.6 6835.6 6835.3 -0.3 -0.3 <br />B-16 400 41553.9 12231.3 6837.2 6837.1 6837.3 6837.0 -0.1 -0.2 <br />B-15 500 41453.8 12233.5 6840.5 6840.5 6840.6 6840.4 -0.1 -0.1 <br />B-14 650 41303.9 12234.3 6847.5 6847.4 6847.5 6847.2 -0.2 -0.3 <br />B-13 725 41229.7 12237.0 6849.6 6849.4 6849.4 6849.3 -0.1 -0.3 <br />A- 4 1100 40852.4 12242.1 6872.7 6869.2 6869.2 6868.9 -0.3 -3.8 <br />B-12 1450 40503.1 12242.9 6898.5 6895.5 6895.6 6895.2 -0.3 -3.3 <br />B-11 1550 40402.7 12245.3 6903.7 6901.0 6900.9 6900.6 -0.4 -3.1 <br />B-10 1700 40251.9 12248.0 6907.7 6905.0 6904.9 6904.5 -0.5 -3.2 <br />B- 9 1800 40151.3 12248.5 6911.7 6908.6 6908.4 6908.0 -0.6 -3.7 <br />B- 8 1900 40052.2 12250.6 6915.5 6911.9 6911.8 6911.3 -0.6 -4.2 <br />B- 7 2000 39952.8 12251.9 6920.5 6917.1 6916.9 6915.9 -1.2 -4.6 <br />B- 6 2050 39903.0 12252.3 6923.3 6920.3 6920.2 6918.9 -1.4 -4.4 <br />B- 5 2100 39854.5 12251.7 6926.1 6923.7 6923.5 6922.2 -1.5 -3.9 <br />B- 4 2150 39803.3 12251.7 6929.6 6927.6 6927.6 6925.9 -1.7 -3.7 <br />B- 3 2200 39751.6 12253.0 6933.5 6932.1 6932.1 6930.3 -1.8 -3.2 <br />B- 2 2300 39652.0 12254.3 6935.3 Destroyed <br />B- 1 2400 39553.3 12254.1 6943.2 6942.5 6942.6 6940.2 -2.3 -3.0 <br />A-Series Line (cent erline) <br />A- 2 40849.8 12040.6 6862.1 6858.2 6858.4 6858.3 0.1 -3.8 <br />A- 3 40851.4 12138.0 6867.3 6863.5 6863.7 6863.5 0.0 -3.8 <br />A- 5 40856.2 12340.8 6876.3 6872.6 6872.8 6872.5 -0.1 -3.8 <br />A- 6 40853.3 12414.9 6878.5 6874.8 6875.0 6874.7 -0.1 -3.8 <br />A- 7 40857.3 12506.1 6878.5 6874.9 6875.1 6874.8 -0.1 -3.7 <br />