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<br /> <br />Mining Phase <br />ear or Activitk DescriRion of Mining and Other Disturbance Activities <br />Mining <br />4-6 Phase 3 Phase 3 mines 82± acres over a 3± year period and includes the remaining part <br />of Parcel D-2. This 82± acres does not include acreage within the (ow flow <br />channel of the S. Platte River east of the Adams County trail easement area, <br />but does include some area within 400' of the S. Platte River channel along <br />portions ofthe eastern boundary ofPazcel D-2 as the mining limit follows the <br />trail easement and then the Sinclair pipeline. As mining within 400' of the S. <br />Platte River channel requires approval by UD&FCD and agreement on what <br />S. Platte River channel improvements should be installed as a condition of <br />approval, no mining will occur without such approval and agreement. This <br />400' area and the proposed mining setback area is shown on Exhibit C-2, <br />Mining Plan Map. <br />Phase 4 Only <br />5-6 Slurry Wall If PSCo. doesn't grant permission to cross their right-of--way, then <br />approximately 1 year prior to beginning mining in Mining Phase 4, the slurry <br />wall will be installed around the area north of the PSCo. right-of--way. The <br />proposed slurry wall setbacks are 10' from any property line, except along the <br />S. Platte River side. Tn this area, starting at from the PSCo. right-of--way, the <br />slurry wall will be located ] 0' west of the Sinclair gasoline pipeline. Prior to <br />excavation being undercaken, this pipeline will be located in the field to insure <br />this slurry wall setback is followed. Calculations on the lineal footage of slurry <br />wall are included on Exhibit C-2, Mining Plan Map. <br />Mining <br />7-10 Phase 4 Phase 4 mines 99± acres over a 4+_ year period and encompasses Parcel D-3. <br />This 99± acres does not include acreage within the low flow channel of the S. <br />Platte River east of the Adams County trail easement area, but does include <br />some area within 400' of the S. Platte River channel along portions of the <br />eastern boundary ofParcel D-3 as the mining limit follows the trail easement <br />and then the Sinclair pipeline. _ S}gµ.fl, <br />~~~..+~i~4et3rtQ$~::Y~Q. motifw~;,l~y4tt+~.~?dY.i-~ig~;li~3t i~fir:~. <br />~~3g&6'd'GLf'Efh~~t8 ~;~1@ttf'k~lvet [fA [E~1a60 ~1t~~d4[C~,~liat piC,S,~~.:~'.~SS.CS, <br />yrPai s mining within 400' of the S. Platte River channel requires <br />approval by UD&FCD and agreement on what S. Platte River channel <br />improvements should be installed as a condition of approval, no mining will <br />occur without such approval and agreement. This 400' area and the proposed <br />mining setback area is shown on Exhibit C-?, Mining Plan Map. <br />6 <br />