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Sedimentation Pond E controls runoff from a portion of the surface facilities, including the main coal stockpile <br />area, prior to discharging to Foidel Creek. TC will survey the pond per the previously outlined schedule. The same <br />criteria will be used to determine if the pond requires cleaning. If so, the material will be removed and hauled to <br />the refuse pile or pit for disposal. The pond is inspected during CDPS sampling and the v -notch weir is checked to <br />determine if it is functioning correctly. Repairs are made on an as -needed basis. The pond is also inspected <br />quarterly to assess the condition of the embankment and spillways and to determine if it is functioning correctly. <br />Repairs are made on an as needed basis. The pond will be removed when it is no longer needed. The outlet works <br />will be removed, the embankment pushed back into the pond excavation and final graded to blend with the <br />surrounding terrain, and the area will be resoiled and revegetated. <br />Sedimentation Pond F receives runoff from the surface facilities, reclaimed surface mine, spoil springs, and <br />underground mine discharge. TC will survey the pond as per the previously outlined schedule. The same criteria <br />will be used to determine if the pond requires cleaning. If so, the material will be removed and hauled to the refuse <br />pile or pit for disposal. The pond is inspected during the periodic CDPS sampling, and the condition of the <br />measuring device is checked. Repairs are made on an as -needed basis. The measuring device is a cutthroat flume <br />located upstream of the road culvert. The weir, previously used to measure flows, did not function properly and <br />required significant maintenance, so a 12 -inch cutthroat flume was installed to assure accurate flow measurements. <br />The pond will be removed when it is no longer needed. The outlet works will be removed, the rock in the <br />emergency spillway may be reclaimed or placed in the pond basin, the embankment will be pushed in and graded to <br />blend with the surrounding terrain, and the area will be resoiled and revegetated. <br />Sedimentation Pond G receives runoff from a part of the surface facilities and the reclaimed surface mine. In 2010, <br />TC submitted a Technical Revision (TR10-77)to extend the discharge channel (Ditch G-6) to connect directly with <br />the existing County Road (RCR27) culvert. Design information for the ditch extension is provided in Exhibit 8J, <br />CYCC Pond G — Stage Storage, and the ditch extension is shown on Map 24 (1/4), Surface Facilities and <br />Freshwater Systems. TC will survey the pond per the previously outlined schedule. The same criteria will be used <br />to determine if the pond requires cleaning. If so, the material will be removed and hauled to the refuse pile or pit <br />for disposal. The pond is inspected during the regular CDPS sampling and the flume is checked to determine if it is <br />functioning correctly. Any problems are noted and repairs made as -needed. Pond G is also an MSHA pond, <br />subject to regular monthly inspections, except during the winter months. For the MSHA inspections, the outlet <br />works and pond embankment are inspected, and any necessary repairs made in a timely basis. The pond will be <br />removed when it is no longer needed. The outlet works will be removed, the outlet channel will be backfilled and <br />regraded, the rock in the emergency spillway may be reclaimed or placed in the pond basin, the embankment will <br />be pushed in and graded to blend with the surrounding terrain, and the area will be resoiled and revegetated. <br />Sedimentation Pond T receives runoff from the explosives magazine and storage yard areas. TCC will survey the <br />pond per the previously outlined schedule. The same criteria will be used to determine if the pond requires <br />cleaning. If so, the material will be removed and hauled to the refuse pile or pit for disposal. The pond is inspected <br />during the CDPS sampling, and the weir is checked to see if it is working correctly. Any problems are noted and <br />repairs made as needed. The pond will be removed when it is no longer needed. The outlet works will be removed, <br />the rock in the emergency spillway may be reclaimed or placed in the pond basin, the embankment will be pushed <br />in and graded to blend with the surrounding terrain, and the area will be resoiled and revegetated. <br />Other Impoundments <br />Wadgep - In order to provide for better drainage from the west ramp of the portal, the drainage system has <br />been modified. The two culverts that carry water from the west ramp will be plugged, and the water will be <br />diverted toward the Wadge sump. These culverts have been deleted from Map 24, but still exist in the field. <br />Wadge sump. These culverts have been deleted from Map 24, but still exist in the field. Water will course to a <br />small sediment dam which holds a 4 -inch overflow pipe. Once the water reaches the top of the sediment dam, the <br />water will enter the 4 -inch overflow pipe and then drain to the sump. This system will aid in settling out some <br />sediment from the water before it reaches the Wadge sump. From the sump, the water will be pumped up into <br />Ditch D-2. <br />TRIO -76 2.05-78 10/13/10 <br />