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~. . Y~1 ` REQUEBT FOR VARIANCE FROM APPRORIMATE ORIGINAL CONTOUR CARBON JUNCTION MINE JANUARY, 1993 Set forth below are responses to Rule 4.27.4 of the Colorado Mined Land Reclamation Division for a variance from the original contour on an area described in the following. This request for variance has been formatted to follow the requirements of Rule 4.27.4. (1) There is no true or classic highwall to be involved with the proposed variance. The area covered in the variance has been shown on the attacted Exhibit A. As can be seen from this exhibit, the subject area includes a "dip- slope" to be mined early in the life of the project. Approximately 40 feet of overburden lies over a coal seam that is 30 feet thick. The slope and the thickness of the overburden has been shown on Exhibit B. The overburden will be removed and permanently stored in the fill area. After the coal is extracted, the reminent footwall will be a solid rock bench with a slope of 57$. Because of the steep slope, it will be impossible to replace the overburden on the slope and insure stability. Consequently, a standard geotechnical analysis of the area will not be applicable. The footwall is a solid rock ledge sitting on a 57$ slope. (2) The watershed control will flow into the normal sediment control system. As can be seen from Map 5-1, the sediment will flow into Sediment Pond P2. No variance in the hydrologic control system will be necessary. See Map 5-1 for design of the sediment control system. (3) No land will be disturbed above the footwall. No blending will be necessary in the final reclamation. There will be no temporary storage of overburden. (4) With this application the operator is requesting the variance. (5) All operations will be conducted in compliance with the provisions of Rule 2.06.5. (6) No spoil will be returned to the variance area, which will be reclaimed in accordance with the approved plan.