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adjacent desirable vegetation. The herbicide mix, based on recommendations from the Colorado State <br />Extension Service, was mixed and applied by Dillon Contracting who is a certified commercial <br />applicator. The weed control areas will continue to be monitored in 2007 for effectiveness and <br />necessary xetreatment. See attached weed control daily log spreadsheet and the 2006 Weed Spray <br />Locations map for a detailed description and location of the 2006 herbicide application. <br />SEDIMENTATION POND SUR <br />SCC is required by Permit C-82-057 to monitor sedimentation ponds for sediment storage capacities. <br />This schedule provides a sediment yield history and gives advance wazning to operations personnel <br />when sediment clean-out work is required. In accordance with Rule 4.05.6(I1)(c), SCC visually <br />inspects each pond a minimum of quarterly each yeaz. 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 2006 survey, all sediment ponds have sufficient sediment storage. Additionally, all <br />ponds have been discharging in compliance with the approved NPDES permit effluent limitations. <br />Yearly sediment delivery estimates to the ponds are considerably less than originally calculated, since <br />significant portions of these watersheds have now been revegetated. <br />The results of the annual survey are shown on Table 06.3, Sediment Pond Capacities <br />STOC%TANSS <br />Stock Tanks T-1 and T-2 were partially constructed in 2006. Weather conditions in October <br />• precluded completion of construction. These stock tanks will be completed in 2007. <br />WILDLIFE MONITORING <br />Seneca Coal Company contracted Thunderbird Wildlife Consulting, Inc. to conduct wildlife <br />monitoring at the Seneca Yoast mine. The work included: <br />1. Winter aerial survey for big game <br />2. Monitoring known Sharp-tailed and Sage grouse leks <br />3. Checking golden eagle nests <br />Big game aerial survey data, eagle nesting activity and other wIldlife monitoring data collected during <br />Mazch, April and May 2006 survey is presented in Wildlife Monitoring Report <br />LITERATURE CITED <br />1995 Annual Reclamation Report, Yoast Mine, Routt County, Colorado. Submitted to Division of <br />Minerals and Geology in March 1996 by SCC, Flagstaff, Arizona. <br />1996 Annual Reclamation Report, Yoast Mine, Routt County, Colorado. Submitted to Division of <br />Minerals and Geology in March 1997 by SCC, Flagstaff, Arizona. <br />1997 Annual Reclamation Report, Yoast Mine, Routt County, Colorado. Submitted to Division of <br />Minerals and Geology in March 1998 by SCC, Flagstaff, Arizona. <br />4 <br />