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1 <br />1 <br />E-T <br />1 <br />1 <br />1 <br />1 <br />1 <br />R <br />1 <br />/ <br />.J <br />��S110 <br />ri <br />sx <br />Girdwater x4,51 <br />1 �'I <br />s02 <br />if 1'4 <br />:II <br />,Top o ike x4603 <br />I <br />I�t Y <br />/men In 3 <br />I <br />I, <br />Filled Fines x4600 <br />Grdwater x4598 ; <br />i Filled Fines x459 <br />Grdwater A597/ <br />e ` a `+ <br />A� ��., ��•�i� <br />B ( yc b <br />Top <br />lz*w� <br />INAW <br />)asin Channel <br />Top of Dike <br />I <br />I <br />'2 <br />I <br />;. ./ `I / ` <br />NOTE <br />Interbasin berm channels are fords in the berms which allow ponded <br />precipitation to flow to Sediment Basin 1 and then to the River. The <br />channels are cut into the berms approximately one foot deep and are 20 <br />feet wide. The bottoms of the channels are concrete rubble choked with <br />road base. The upstream edges of the channels are at the elevation of the <br />filled fines in the upper basin, and the downstream edges of the channels <br />are at the elevation of the filled fines in the lower basin. Vehicles can <br />traverse across the channels, similar to a ford. <br />\/ <br />I <br />T <br />0 <br />edi nt Basin �� N�\�` <br />all a buil n N I <br />ding u 0 <br />PHASE 1 AREA � <br />Amendment 4 �1 <br />1 . Y14, <br />I< Filled Fines x4598;/ If"� <br />G`dwater x4596 _ 4� <br />O <br />9& <br />Phase 1 <br />Runoff Discharge <br />1 <br />n 1 <br />PHASE 7 AREA <br />Amendment 4 j <br />1 <br />CI <br />1 ! 1 <br />11 <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 />1 channel will remain to carry normal runoff. If needed, cottonwood and <br />yl Pipe 'r willow stems will be transplanted to initiate riparian forest growth. <br />`? <br />�ediment Basin Barrier Berms <br />PROPERTY BOUNDARY <br />D �I (Where not congruent with Permit Boundary) <br />M PERMIT BOUNDARY <br />1 <br />a 1 MINING LIMIT <br />-- PRE-MINING TOPOGRAPHY <br />0000 Existing Elevation <br />(� x0000 Proposed Elevation <br />I <br />Revised: 01/07 <br />Amendment 3 <br />Revised: 06/04 <br />Amendment 2 <br />Amendment 4 By: Revised: 0612011 <br />121512011 <br />Signed: Liy/��/ lC� Amendment 4 Revised: 09/02 <br />Date: Dece ber 5, 2011 add Aquila power line <br />100 400 <br />0 200 <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 />Drawn by: MAH <br />F1A- amend 3 RECLA Phase 1 Detail Map.dwg <br />l� <br />'I <br />