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Soil Replacement Thickness <br />The soil replacement thickness for the first five-year permit term was projected to be 1.0 fee[ for [he mine <br />area. The soil balance as of December 31, 2002 was calculated as follows: <br />Mine Area <br />Total disturbance area = 546.1 acres <br />Permanent Facilities & Topsoil replaced = 212.2 acres <br />Disturbance area requiring soil = 333.9 acres <br />Soil in stockpiles (Table 00.1) = 793.7 acre-feet <br />Mean replacement depth available = 2.38 feet <br />By dividing the soil available by [he area requiring soil replaced, we artive at the 2002 soil balance thickness <br />of 2.4 feet for the mine area. More than enough topsoil has been salvaged to reclaim the existing disturbance <br />with the permitted replacement thickness of 1.0 feet. <br />Revegetation <br />Revegetation activities in 2002 included revegetation by drill seeding 101.0 acres using seed mix (see Seed <br />Tag 1). <br />Wildlife Monitoring <br />Big game aerial studies were completed by Powder River Eagle Studies of Gillette, Wyoming, during <br />January 2002. See [he Wildlife Monitoring Report , Yoast Mine Site 2002 Big Game Aerial Survey. <br />Literature Cited <br />1995 Annual Reclamation Report, Yoas[ Mine, Routt County, Colorado. Submitted to Division of Minerals <br />and Geology in March 1996 by SCC, Flagstaff, Arizona. <br />1996 Annual Reclamation Report. Yoas[ Mine, Routt County, Colorado. Submitted to Division of Minerals <br />and Geology in March 1997 by SCC, Flagstaff, Arizona. <br />1997 Annual Reclamation Report, Yoast Mine, Routt County, Colorado. Submitted to Division of Minerals <br />and Ceology in March 1998 by SCC, Flagstaff, Arizona. <br />4 <br />