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.~ <br />III IIIIIIIIIIIII III <br />999 <br />Technical Revision Application <br />Backfilling. Grading and Hydrologic Control Plans <br />The Ohio Creek Coal Mine has ceased operation and is in the process of reclaiming its OC #2 <br />Mine. The following backfilling and grading plan will be implemented in two phases to reclaim the <br />disturbed area, approximately 3.22 acres. Phase [includes the tasks below and assumes that the <br />portals have been backfilled and the buildings and coal handling facilities have been removed and <br />the trash has been hauled from the site and disposed of in an approved manner. <br />1. Removal of the coal fines/refuse from the tipple bench out slope and placement of the <br />coaUrefuse against the toe of the tipple bench cut slope for burial, <br />2. Removal of the pickup bed and other structures from the ditch directing surface water off the <br />tipple bench to the collection ditch going to the sedimentation pond. The truck bed will be <br />scrapped or disposed of in an appropriate landfill. The concrete will be placed against the toe of <br />the tipple bench cut slope for burial, <br />3. Removal and/or burial of the concrete structures and foundations. The concrete will be either <br />be placed at the toe of the bench cut slope or buried in place provided it is covered a minimum of <br />four feet of fill, <br />4. Grading of the portal and tipple benches to the approximate original contour using materials on <br />site, estimated at 8,500 bank cubic yards. The portion of the mine road just east of the branching <br />to the benches will be left in place to provide Gunnison County Road Commission with a tum <br />around for their snow plows. <br />5. Grading of the subsidence expression in the area behind the portals and uphill of the fence on <br />the west side of the mine disturbed area with material from the bench areas. The subsidence <br />expression immediately behind the portal will be graded as part of the portal bench reclamation. <br />The remaining subsidence expressions, similar to gullies caused by erosion, are on both sides of <br />and within thirty feet of the fence on the west side of the disturbed area. The filly will be mounded <br />6" to 12" high to provide material to repair any settling that occurs in the future. These areas were <br />identified on the site visit conducted during September, 1995. <br />All Phase I areas including the subsidence repair will be seeded with the approved seed mix and <br />seeding schedule. <br />Phase II includes the removal of the upper diversion ditch, D-3 and D-4, the lower collection <br />ditch, D-1 and D-2, and the sedimentation pond after the reclaimed area is stabilized and the <br />vegetative cover has been established. Approval from the Division will be obtained prior to <br />commencing reclamation of these facilities. <br />