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<br />the previous pit area to connect with the natural drainage downstream as a part of <br />final grading activities. <br />A total of 448,000 cubic yards of material were backfilled into Pit No. 1. A volume <br />of 284,700 compacted cubic yards were obtained from the overburden stockpile and <br />163,300 cubic yards from reducing the highwalls next to the pit. The two highwalls, <br />on the east and south of Pit 1, were ripped and graded to 4H:iV to blend these <br />slopes into the surrounding terrain. <br />The drainageway was constructed at the south end of the pit between the two <br />highwalls. The drainage daylights into an existing channel that ultimately reaches <br />Bolton Draw. The channel is approximately 500 feet long. <br />A sediment pond (002) was constructed in the drainage comdor to control sediment <br />from the southern part of the pit area. All drainage to the north passes through <br />existing sediment pond 001. A temporary drainage diversion ditch was constructed <br />on the west side of the pit to keep undisturbed runoff from entering the reclaimed <br />area. Sediment pond number 3 and the diversions were removed following the 1990 <br />Bond Release request. Ponds 1 and 2 were approved as permanent impoundments <br />per TR-06 and in compliance with 4.05.6(14). <br />Topsoil was salvaged from the drainageway and highwall reduction areas. <br />Approximately 8,000 cubic yards of topsoil were live handled from these areas and <br />64,000 cubic yards were obtained from the existing stockpile. The topsoil provided <br />an average cover of 0.5 feet over the 81 acres of reclaimed disturbed area. <br />Information on backfilling and grading can be found in Section 2.08.5 of the permit <br />application. The operation is in compliance with the requirements of this section. <br />XI. Revegetation <br />Two plant communities, big sagebrush and alkali sagebrush, were located within the <br />permit area. Big sagebrush communities are found on the south and southwest <br />facing slopes, whereas the alkali sagebrush communities are found on north and <br />northeast facing slopes. Reference areas, one for each community type, will be used <br />for evaluation of revegetation success. <br />Species diversity, woody plant density, production, and cover standards have been <br />established for assessing revegetation success. These standards were defined as part <br />of satisfying permit stipulation Nos. 18, 19 and 17, respectively, of the permit <br />approval. <br />Canadian Strip Mine, C-81-026 23 July 31, 1992 <br />