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• SEDIMENTATION POND SURVEYS <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 warning to operations personnel <br />when sediment clean-out work is required. In accordance with Rule 4.05.6(11)(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 2005 survey, all sediment ponds have sufficient sediment storage. Additionally, all ponds <br />have been dischazging in compliance with the approved NPDES permit effluent limitations. Yearly <br />sediment delivery estimates to the ponds aze considerably less than originally calculated, since the <br />azeas in these watersheds have now been reclaimed and revegetated. <br />The results of the annual survey aze shown on Table 05.3, Sediment Pond Capadties. <br />STOCK TANKS <br />No stock ponds have been constructed at the Yoast Mine. <br />WILDLIFE MONITORING <br />Seneca Coal Company contracted Thunderbird Wildlife Consulting, Inc. to conduct wildlife <br />monitoring at the Seneca II 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 2005 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 Mazch 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 Mazch 1998 by SCC, Flagstaff, Arizona. <br />]998 Annual Reclamation Report, Yoast Mine, Routt County, Colorado. Submitted to Division of <br />Minerals and Geology in March 1999 by SCC, Hayden, Colorado. <br />1999 Revegetation Monitoring Report, Yoast Mine, Routt County, Colorado. Submitted to Division <br />of Minerals and Geology in February 2000 by ESCO Associates Inc. and SCC, Hayden, Colorado. <br />2000 Annual Reclamation Report, Yoast Mine, Routt County, Colorado. Submitted to Division of <br />Minerals and Geology in March 2002 by SCC, Hayden, Colorado. <br />