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t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 1 <br />NOTES ON RECLAMATION OF PHASE 1 AREA <br />The Phase 1 area will be subdivided into four main sediment basins, which <br />will contain the wash fines generated from the processing of the sand and <br />gravel. Some of the main basins may be further divided if needed into <br />smaller basins. <br />The basin barrier berms or dikes between the basins will be progressively <br />built up as the wash fines are deposited in the basins. The top of the dikes <br />will finally be at three feet above the pre- mining groundwater level. The <br />wash fines will be deposited to two feet above pre- mining groundwater <br />level, thus no exposed groundwater will remain. The discharge pipe from <br />the wash plant will be relocated as the basin is filled to allow for even filling <br />of the basin. The top of the dikes will be ten feet wide to accommodate <br />equipment vehicles. <br />The elevations of the filled basins will be highest in the northern section <br />and be slightly lower in the southern section. In the final reclamation, <br />channels will be cut periodically through the elevated dikes to allow runoff <br />water to flow to the lowest basin at the southeast corner. Here a discharge <br />channel will carry runoff into the drainage ditch and then be discharged <br />into the River at the historic point When the Phase 1 area is vegetated in <br />riparian forest and wetland, it is unlikely runoff water will be discharged <br />through his channel. <br />Weed control, especially for Tamarix, should begin as soon as plants are <br />seen invading the basins. Even partially filled basins can develop weed <br />problems and should be treated. Access will be via the dikes and <br />temporary planks for weed control workers. <br />If after several years the desirable species such as cottonwood and willow <br />are not adequately regenerating in areas of the basins, cottonwood and <br />willow stems will be transplanted at the rate of 100 per acre in those areas. <br />These transplants will initiate more tree growth by their spreading roots. <br />Side slopes leading from the unmined adjacent land will be graded to a <br />slope of 3:1. <br />The plant site, when no longer needed, will be scarified to a depth of one <br />foot, covered with six to eight inches of topsoil, and planted with the seed <br />mixture stated in Exhibit E. <br />The old discharge pond in the extreme southeast corner of Phase 1 will <br />remain in place. Any waste piles will be graded down. The discharge <br />channel will remain to carry normal runoff. If needed, cottonwood and <br />willow stems will be transplanted to initiate riparian forest growth. <br />HIM <br />M = M � <br />-- -- -- -- -- - ... ... ... ... - .- ... ... <br />- - -' PRE-MINING TOPOGRAPHY <br />I <br />I <br />F vised: 01/07 <br />endment 3 <br />Revised: 06/04 <br />Amendment 2 <br />I <br />Sediment Basin Barrier Berms <br />PROPERTY BOUNDARY <br />(Where not congruent with Permit Boundary) <br />PERMIT BOUNDARY <br />MINING LIMIT <br />100 400 <br />O 200 <br />scale: 1" = 300' <br />contour interval = 2' <br />Continental Materials (M- 1986 -015) <br />East Pit - Transit Mix of Pueblo <br />Exhibit F -1A -PHASE 1 DETAIL <br />Reclamation Topography <br />[Revised: 06 /2011 Revised: 09/02 <br />mendment 4 add Aquila power line <br />Drawn by: MAH <br />