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58rMOiM C~•ek Ml~re <br />January 22, 2002 <br />Jim Burnell <br />Environmental Protection Specialist <br />State of Colorado <br />Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />~~~~~~E~ <br />FES 2 ~ 2002 <br />Division of Minerals and GealagY <br />Re: 2001 Annual Subsidence Report <br />Dear Mr. Burnell: <br />This subsidence monitoring report is submitted as required by permit section 2.05.6(6)(c)(i), page <br />2.05-61i. <br />The Operator is to visually inspect the permit area for the Sanbom Creek Mine and the Sanborn <br />East Tract for mass movement features in June and November of each year. Particular attention is <br />to be focused upon the modern landslide on the east valley slope of Coal Gulch, the landslide <br />features within the unnamed drainage between the Sanborn Creek and Coal Gulch drainages, and <br />the modem landslide on the west valley slope of Hawksnest Creek. If new mass movement features <br />aze noted, they are to be brought to the attention of the Division. <br />During the past five years, a visual subsidence-monitoring program has become part of the routine <br />monitoring of Springs 1 through 11. Springs 1 through 6 are reached from the U. S. Forest Service <br />road up Coal Gulch. During trips to these springs from April to October, the higher elevations of <br />the permit area for the Sanborn Creek Mine and the Sanbom East Tract are visually inspected for <br />mass movement features, with particular attention focused on the landslides in Coal Gulch and <br />Hawksnest Creek. Springs 7 through 11 aze along old Highway 133 in the lower elevations of the <br />permit area for the Sanborn Creek Mine and the Sanbom East Tract. During monthly monitoring <br />the lower elevations aze visually inspected for mass movement features, with particular attention <br />focused on the landslides in Coal Gulch and the unnamed drainage between the Sanborn Creek and <br />Coal Gulch drainages, above Springs 7 and 9 respectively. <br />During 1995 and 1996 the area in the lower elevations of Coal Gulch were mined in the vicinity of <br />the Coal Gulch slide. There has been no indication ofrecent mass movement in the landslide as a <br />result of the mining. Mining under the ridge in Section 10 between Coal Gulch and the unnamed <br />drainage was completed in 1996, with no indication of differential settlement in the massive <br />P. O. Box 5 3 5 3 7 3 7 Highway 7 3 3 Somerset , C o l o r a d o 8 7 4 3 4 U S A <br />TEL (970) 929-5722 FAX (97Q) 929-5177 <br />