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activity directed towards areas of hound's tongue and whitetop. Control areas were sprayed <br />in May, august and September. A spot spray gun was used to concentrate control activities <br />on target areas, reducing potential impacts to adjacent desirable vegetation. The herbicide <br />mix, based on recommendations from the Colorado State Extension Service, was mixed and <br />applied by a certified commercial applicator. The weed control areas will continue to be <br />monitored in 2013 for effectiveness and necessary retreatment. See attached 2013 Weed <br />Control (daily) Logs for a detailed description and location of the 2013 herbicide application. <br />• Grazing <br />Sheep (700 ewes) were moved on to the Yoast reclaim area for 30 days between Sept. 1"' and <br />September 30th . This grazing scheme resulted in a total of 140 AUMs for 2013. <br />Assumptions: <br />Five (5) sheep = 1.0 AUM <br />One (1) ZUNI requires 810 lbs. of forage <br />30 days (x) 700/5 animal units = 4200 animal days - 30 days = 140 animal unit months <br />(SUM) <br />1100 lbs /acre (x) 798 acres = 877,800 lbs of forage available <br />810 lbs (x) 140 AUMs = 113,400 lbs of forage required <br />Therefore; <br />113400 - 877800 (x) 100 = 13.0 % utilization of the Yoast reclaimed 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 2013 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. The results of the annual survey are shown on Table 13.3, Sediment Pond <br />Capacities. <br />5 <br />