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• Two surface ditches, above and below the slump to divert surface runoff away from the <br />slump; <br />• Two slot drains across the toe of the slump to allow drainage of trapped water; <br />• Regrading portions of the surface of the slump to minimize infiltration of water and <br />improve positive drainage away from the area, particularly from the depression adjacent to <br />the head scrap; <br />• Revegetation of all disturbed areas; and, <br />• Installation of permanent movement markers to monitor potential movement of the slump. <br />Field observations and movement marker surveys conducted between 1998 and 2005 indicate that <br />the slump mitigation measures to enhance ground stability were successful. The observations and <br />measurements show there has been no additional movement between 1998 and 2005. <br />3.0 SUMMARY <br />• All disturbance areas (366 acres) have been successfully revegetated. <br />• The Partial Phase II and Phase III release for 357.3 acres, approved in 1999, indicated an <br />average vegetative cover of 77.6 percent, average total cover of 93.7 percent and production <br />of 239 pounds per acre; values that were higher than the reclamation standards. <br />• Three shrub enhancement areas were established covering approximately 7.7 acres. <br />Approximately 1,000 stems per acre were planted. <br />• 2005 vegetation monitoring (Year l0) show that the average woody stem density within the <br />three shrub enhancement parcels ranged from 406 stems per acre to 7,600 stems per acre, <br />with an average of 1,767 stems per acre. The success criterion was 750 stems per acre. <br />• There was no slope movement at the highway slump area following the mitigation work <br />completed in 1998. <br />• The Colorado Division of Reclamation, Mining and Safety approved Phases I, II and [I[ <br />bond release, as applicable, for the 8.9 remaining acres of the permit area in October 2006. <br />Hayden Gulch ,Nine 2006 Award Nomination Page a <br />