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Pond 5 was being obliterated by the North Portal reclamation project during the <br />inspection. Therefore, no comments are provided for this pond. <br />Pond 6 collects run-off from CRDA-1. The pond was dry during the inspection. The <br />embankment it shares with Coal Gulch was fortified during the first quarter of 2002. Rip <br />rap was placed on the Coal Gulch side of the embankment for about 300 lineal feet. <br />There is approximately 2.3-feet of sediment buildup in the pond. This figure is derived <br />from the average length of the three sediment poles located in the pond minus the <br />design depth. Based on this sediment buildup and aerial topo maps, the pond has the <br />following estimated capacity: <br /> Water Sediment Total <br />Pond 6 - A-F 1.33 1.10 2.35 <br />The estimated water capacity of Pond 6 is less than the original design requirement of <br />1.49 acre feet. However, calculations presented in Volume III, Appendix 13-2, page <br />CDRA-1-iii, based on the partially reclaimed and vegetated refuse pile, indicate the <br />required water capacity of Pond 6 is only 0.68 acre-feet. <br />Pond 7 collects run-off from the North Decline. The pond was dry during the <br />inspection. Volume III, Appendix 13-2, page NDEC-1 shows that its design water and <br />sediment capacities are 0.23 A-F and 0.03 A-F respectively. It is a dugout pond which <br />must be dewatered with a pump. There is little if any sediment build up in the pond. <br />Therefore, the pond's capacity is obtained from the most recent pond certification <br />performed by Larry M. Reschke, P.E., on June 1, 1995. <br /> Water Sediment Total <br />Pond 7 - A-F 0.34 N/A 0.34 <br />Pond 8 collects run-off from the South Portal and the RSRDA. The pond was dry with <br />puddles during the inspection. Volume III, Appendix 13-2, page RSS-1 shows that its <br />design water and sediment capacities are 1.79 A-F and 0.83 A-F respectively. It is a <br />dugout pond which must be dewatered with a pump. There is no sediment buildup in <br />the pond. Therefore, the pond's capacity is obtained from the most recent pond <br />certification performed by tarry M. Reschke, P.E., on October 17, 1995. <br /> Water Sediment Total <br />Pond 8 - A-F 3.88 N/A 3.88 <br />-2- <br />