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<br />-1°- <br />• <br /> <br />DLY+ATCRIIiG <br />Possible dewaterin7 pro4lems i,ave i7een discussed at the individ- <br />ual Nnstruction sites. The most critical area will be with Da,~ 1. ". <br />The contractor should he well aware trat if ~.aater is cnrvuntercd, it <br />will have to be dealt with as construction nrocceds. .1 Nr~ination of <br />ChannellRg, and possl~ly Cum_J1R'~, fro:-~ Wlt}'i1R CXC3Vat lonS anl~ SU'^,rS, aS <br />well as expeditious placement of fill, •.+ill b' required to Nmplete the <br />lower levels of the ~t:ankr.;ent at this sita. <br />Rt Dat1 2R, a s:-~a11 amount of percheJ wat_r Tray F.e encount?red <br />overlying tedroc:c. It should be relatively easy to deal with by <br />• dewaterirr3 within the excavation and s~~ cilannelization. <br /> At cams 3 and 4, it is doubtful that water will to encountered <br />during construction. It is always ~x?ssible that a s^,all cuantity of <br />perched water can be encountered overlyir.^ bedrock. lfiese shoulc be <br />relatively shall quantities and easily d?alt with as the}~ occur. <br />Perched ground water will w encrountered in everexcavation at <br />Dam 5. ray channelization and providing a positive outfall, we !r_lieve <br />this can be handled. Some pumping may be required. F.arid nlacen?nt o' <br />the fill will be recuired once the excavation has been o!~ened. (me- <br />diate replacement of the excavate:? soils will ~ro.~aly not to feasible <br />due to high natural rroisture contents. <br />In general, the contractor should submit a prorose?: ~che-e for <br />dewatering each site prior to beginnirxl excavation. This clan should <br />u <br />