2014-05-13_PERMIT FILE - C1996083A (3)

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0 2.05.6(6) (b) A description of the worst possible consequences which subsidence, if it occurred, could have for such structures or renewable resource lands. (b)(i)(A) The premining land use of the permit area is classified as rangeland, wildlife habitat and industrial. The premining land use of the USDA -FS managed lands are described in the GMUG Land and Resource Management Plan as: "Lands are managed for wildlife habitat management for one or more Forest Service management indicator species. Semi - primitive - non - motorized, semi - primitive motorized, and roaded natural recreation opportunities are provided. Livestock grazing and vegetation treatments are allowable." The majority of the area is rangeland and wildlife habitat. The area classified as industrial is the previously disturbed area associated with the old King Mine. The postmining land use of the permit area will be classified the same as the premining land use which is rangeland, wildlife habitat, the UDSA -FS land use and industrial. See Map 12, Premining Land Use and Map 13 Postmining Land Use. (b)(i)(B) A description of the subsidence related phenomena predicted to occur within the permit and adjacent area is presented in Volume I IIA, Exhibits 15, 17 and 21. The aerial extent of predicted subsidence related phenomena within the permit and adjacent area is shown on Map 27 Subsidence. Traditional subsidence and predicted rock roll out areas are both shown on the Map. The aerial extent for the traditional subsidence is calculated based on a 25 degree angle of draw over areas where subsidence is expected to occur. The rock roll out areas are predicted using the Colorado Rockfall Simulation Program, version 4.0, developed by the Colorado Department of Transportation, the Colorado School of Mines and the Colorado Geological Survey. The results of the rock roll out predictions are presented in Volume VII, Geotechnical Studies, Tab 11. • PR -12 2.05-139- 02/10 APPROV6D 1) 114110