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Topsoil Replacement. 10.2 acres of topsoil was replaced during 2013. Therefore, the total <br />remaining mine disturbance area requiring topsoil (as of December 31, 2013) is 10.0 acres. This <br />acreage balance is found accounted for in ponds which have not yet been approved as permanent. <br />Topsoil Replacement Thickness. The overall topsoil replacement thickness for the II -W <br />disturbed area was originally projected to be 1.3 feet for the mine area. The topsoil balance for the <br />remaining disturbed area was calculated as follows: <br />Mine Area <br />Total Disturbance Area = 1,290.2 acres <br />Permanent Facilities & Topsoil Replaced= 1,257.2 acres <br />Disturbed area requiring topsoil = 10.0 acres <br />Topsoil in stockpiles (Table 13.1) = 7.0 ac -ft <br />Mean Replacement Depth = 0.7 feet <br />(8.4 inches) <br />REVEGETATION <br />• Seeding and Shrub Planting <br />Seeding. There were 10.2 acres (upland) seeded for the first time in 2013. There were 2.5 acres <br />reseeded in the area at Shrub Plot Slide, and Pond 16 area. Table 13.2 lists the approved seed mix <br />for upland sites and ephemeral drainages. Seed tags from the seed bags used are contained in the <br />attachment 2013 Seed Tags. <br />Shrub Planting. There were 2,880 shrubs and trees planted near pond 16 and the former 16A <br />reclaimed sites. <br />The types and number planted included: <br />Silver Sage <br />500 <br />Narrowleaf Cottonwood <br />700 <br />Thin Leaf Alder <br />480 <br />Box Elder <br />1000 <br />Willow <br />200 <br />Total <br />2880 <br />Monitoring <br />ESCO Associates, Inc conducted revegetation monitoring of permanently revegetated areas and <br />shrub establishment monitoring in the shrub plot areas during the summer and fall of 2013. The <br />2013 Annual Revegetation Monitoring Report will be submitted as a separate document. <br />2 <br />