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<br />... - "--'""--"'~''"'''':'_o'';:'''''_,: "i<,:j.;'.o'-'_ ., ,.. ~o V <br /> <br />co <br />(:'J <br />,-.: <br />~,t ~6mmnn excavation. A part of the excavation will be i~ conBolidat~ <br /> <br />I..,.~'" <br />(~; ed sediments, insufficiently hardened to be called rock, but mcre <br /> <br />Gxpensive to be removed than common excavation. Materiel of this <br /> <br />kind is being removed under Bureau contract at a cost of 15 to 30 <br /> <br />cents por cubic yurd. In the absence of field dnta on e~cavntion <br /> <br />~. <br /> <br />conditions, it is estimated that 10 per cent of the excavr,tion fol" <br /> <br />the Storm Chunnel and 20 per cent 0f the excavati on for the Main <br /> <br />l <br />({ <br /> <br />Drain will be in material of this character, for which a contract <br /> <br />price of 25 cents per cu. yd. has boen adopted. <br /> <br />l <br />~ <br /> <br />For bridges, fencing and ~ther appurtennnt structures, <br /> <br />estill'.n.tes ho.ve been mo.de on a lump sum basis for each mjor struc- <br /> <br />ture and for eaoh class of minor structures, without the benefit <br /> <br />~ <br />je' <br /> <br />of deteil designs. <br /> <br />The eirc.ins, berms, spoil ba.nks, intercepting ditches and <br /> <br />fonces, will require a right of vmy of a ~~dth of 100 to 200 feet. <br /> <br />t <br /> <br />For estimating pUrposes~ considering the needs for maintenance, n <br /> <br />width of 400 feet has been a.ssumed desirable. Considering that a <br /> <br />mnterial pnrt of the lc.nds traversed by th~ drain are owned by th~ <br /> <br />United States, State and Counties, end will become availa.ble at a <br /> <br />nominel cost, the total cost of right of ways are estinnted et <br /> <br />$24,000. This item, however, does nAt include the cest ~f securing <br /> <br />"f WD.ivers of damuges by reason of c. depressed wr.ter table that my <br /> <br />result from th~ construction of' the Main Drain, the effect of which <br /> <br />may bA felt for several miles on either side of tho drain, excopt on <br /> <br />the river bottom south of tho D. & R. G. Railway Wlero the effect <br /> <br />15 <br /> <br /> <br />