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• samples were taken in the Wadge antl Pecoco pastures in 1997, See the 1997 Annual Revegetation Monitoring Report for discus slon concerning [he effects of grazing Sn [he Wadge Pasture, IESCO, 1997), Assumptions: 1 long yearling = .8 AUM, requiring 648 pounds of Eo rage per month. One AUM requires 810 pounds of forage. Chronological History of Revegetation Areas reveq etated from 1977 through 1995 a[ the Seneca II Mine are shown on Exhibit 95.4, Chronological History of Revegetation Activities in [he 1995 Annual Reclamation Report, SCC 1996. Areas revegecated in 1997 are shown on drawing 5297-4. Sedimentation Pond Surveys SCC is required by Permit C-BO-005 to monitor sedime oration ponds for sediment storage capacities. In TR-15, CDMG approved the following frequency schedule to conduct sediment surveys for the pontls at Seneca II Mine. Sedimentation Pond Frequency Next Scheduled Survey • 002 Once Every 5 Years 1998• 003 Once Every 5 Yeats 1998` 004 Once Every 2 Years 1999• 008 Once Every 2 Yeats 1999` • SCC recommends the next survey for all four ponds be completed in 1998. This schedule provides a sediment yield history and gives advance warning [o operations personnel when sediment clean-out work is required. In accordance with Rule 4.05.61111lc1. SCC visually inspects each pond a minimum of quarterly each year. During these inspections, any drastic change rn sedimentation storage or sudden increase in a sediment delta a[ the role[ to [he pond could be detected which would require mitigation. No sediment clean-out work was conducted during 1996 for [he sedimentation ponds at Seneca II Mine. Sediment Po ntls 002, 003, 004, and 008 were surveyed in July 1993 for sediment determination. As stated in the past, ponds containing water are very difficult [o survey and obtain a high degree of accuracy. In 1993, Seneca adopted a new approach to sediment surveys. That is, concentrating the survey shots in an area where the most sediment • deposition is likely m occur. 5