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• By dividing the topsoil available by the area requiring topsoil replacement, we arrive at the future <br />topsoil balance thickness of approximately 2.3 feet for the remaining disturbance area. This <br />generalized topsoil balance does not account for any area variations or for permanent facilities not <br />requiring topsoil; it is strictly an area-wide average. <br />• <br />During 2007, topsoil thickness sampling was conducted over the topsoiled area on a 500 ft. grid. The <br />overall topsoil replacement depth for the areas reclaimed to date is 21.4 inches. The 21.4 inches is <br />right in line with the original projections of 21.6 inches. <br />REVEGETATION <br />• Seeding and Shrub Planting <br />Seeding. 25.5 additional acres were seeded for the first time in 2010. Various drainage channels <br />were interseeded with interseed mix to increase stability. Mix #3 (Mesic Drainage and Sub-irrigated <br />Sites) was used in the drainage channels. Table 10.2 lists the approved seed mix for upland sites and <br />ephemeral drainages, Table 10.3 lists the approved seed mix for mesic drainages, Table 10.4 lists the <br />approved seed mix for the alkaline lowlands, Table 10.5 lists the approved seed mix for interseeding. <br />An actual seed tag from the seed bags used is contained in the attachment 2010 Seed Tags. <br />Shrub Plots. 2.4 acres of additional shrub plots were established in 2010. <br />Species Number Planting Site Fenced Non-fenced <br />Po ulas an gust 400 Pond 12 400 <br />Po ulas an gust 400 Riparian Annan 400 <br />Po ulas an gust 200 Riparian Annan 200 <br />Prunus virgin 200 Pond 12 200 <br />Prunus virgin 320 Riparian 320 <br />Ribes aureum 400 Pond 12 400 <br />Ribes aureum 600 Riparian Annan 350 250 <br />Salix exi ua 900 Pond 12 900 <br />Salix exi ua 1100 Riparian Annan 700 400 <br />Amelan alnifolia 400 Pond 12 400 <br />Amelan alnifolica 286 Riparian Annan 200 86 <br />Acer ne undo 570 Pond 12 570 <br />Acer ne undo 910 Ri pa an Annan 510 400 <br />Totals 6686 2480 4206 <br />• Monitoring <br />ESCO Associates, Inc conducted revegetation monitoring of permanently revegetated areas during <br />the summer of 2010. The 2010 Annual Revegetation Monitoring report will be submitted under <br />separate cover. <br />• Weed Control <br />• Survey for noxious weeds was carried out on the Yoast Mine permit area in 2010. Monitoring was <br />conducted in 2010 to determine the need or level of retreatment necessary for areas sprayed in 2009. <br />Canada thistle was the primary target species in all control areas, with lesser activity directed towards