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activity directed towards areas of hounds tongue and whitetop. Control areas were sprayed in <br />August and September. A spot spray gun was used to concentrate control activities on target <br />areas, reducing potential impacts to adjacent desirable vegetation. The herbicide mix, based <br />on recommendations from the Colorado State Extension Service, was mixed and applied by a <br />certified commercial applicator. The weed control areas will continue to be monitored in <br />2012 for effectiveness and necessary retreatment. See attached 2011 Weed Control (daily) <br />Log and the 2011 Weed Spray Location map for a detailed description and location of the <br />2011 herbicide application. <br />• Grazing <br />Sheep (820 ewes) were moved on to the Yoast reclaim area for 49 days between August 1St <br />and September 19th. This grazing scheme resulted in a total of 268 AUMs for 2011. <br />Assumptions: <br />Five (5) sheep = 1.0 AUM <br />One (1) AUM requires 810 lbs. of forage <br />49 days (x) 820/5 animal units = 8,036 animal days - 30 days = 268 animal unit months <br />(AUM) <br />1,800 lbs /acre (x) 798 acres = 1,436,400 lbs of forage available <br />810 lbs (x) 268 AUMs = 217,080 lbs of forage required <br />Therefore; <br />217,080 _ 1,436,400 (x) 100 = 15.0 % utilization of the Yoast reclaim area. <br />SEDIMENTATION POND SURVEYS <br />SCC is required by Permit C -82 -057 to monitor sedimentation ponds for sediment storage <br />capacities. In accordance with Rule 4.05.6(11)(c), SCC visually inspects each pond a <br />minimum of quarterly each year. During these inspections, any drastic change in <br />sedimentation storage or sudden increase in a sediment delta at the inlet to the pond could be <br />detected which would require mitigation. <br />Based on the 2011 survey, all sediment ponds have sufficient sediment storage. Additionally, <br />all ponds have been discharging in compliance with the approved NPDES permit effluent <br />limitations. Yearly sediment delivery estimates to the ponds are considerably less than <br />originally calculated, since significant portions of these watersheds have now been <br />revegetated. <br />The results of the annual survey are shown on Table 11.3, Sediment Pond Capacities. <br />STOCK TANKS <br />No stock tanks were constructed in 2011. <br />3 <br />