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<br />November 8, 1995 <br />• iii iiiiiiiiiiiu iii <br />999 <br />PACIFIC BASIN RESOURCES <br />A Division of Oxbow Carbon & Minerals, Inc. <br />Anthony J. Waldron ~F(,F~VE~ <br />Environmental Protection Specialist <br />Division of Minerals and Geology N~ 13 1995 <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />pivisron of ~hineta'~ ~ "~0`0y4 <br />RE: 1995 Annual Subsidence Report <br />Permit C-81-022 <br />Dear Mr. Waldron: <br />This subsidence monitoring report is submitted as required by <br />permit section 2.05.6(6)(c)(i), page 2.05-61i. <br />The Operator is to visually inspect the permit area for the <br />Sanborn Creek Mine and the Sanborn East Tract for mass movement <br />features in June and November of each year. Particular attention <br />is to be focused upon the modern landslide on the east valley <br />slope of Coal Gulch, the landslide features within the unnamed <br />drainage between the Sanborn Creels and Coal Gulch drainage and <br />the modern landslide on the west valley slope of Hawksnest Creek. <br />If new mass movement features are noted, they are to be brought <br />to the attention of the Division. <br />The June visual inspection was performed beginning on May 30, <br />1995 during spring monitoring in the upper Coal Gulch area. The <br />landslide feature had been releasing minor rock fall debris onto <br />the trail below the slide during the spring run-off. Upper scarp <br />markings were evident, but no indication of recent mass movement <br />was based on appearance of soil and vegetation in the bottom of <br />the scarp trenches and along the toe of the slide. The rock fall <br />debris was cleared from t}re trail by the Forest Service during <br />the summer. <br />Winter snowpack remained above 8,000-foot elevation, but the <br />permit area along the ridge above the active workings in Sections <br />3 and 10 was observed for any new mass movement features. The <br />eastern permit area in Sections 1 and 2, along with the landslide <br />feature in Hawksnest Creek drainage was also inspected. <br />During June monitoring on June 5, the southern permit area along <br />the highway in Sections 9, 10, 11, and 12, along with the <br />landslide feature in the unnamed drainage were inspected. No new <br />mass movement features were noted in any of the areas inspected. <br />Sanborn Creek Mine P.O. Box 535 Somerset, Colorado 81434 Phone (970) 929.5122 Fax (970) 929.5177 <br />