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<br /> <br /> >~ <br /> r-- <br />~ 0(') <br />\,~; C\.! <br /> C-1 Depth of Water Capacity <br /> ~~) <br /> ~.' . <br /> "-' <br /> 2 feet 22 cu, ft. per sec. <br /> 3 II 49 II II II II <br /> 4 II B4 II " II 11 <br /> 5 " 130 II II II 11 <br /> 6 11 188 11 11 " II <br /> 7 11 255 II 11 II 11 <br /> 8 II 336 " II II 11 <br /> <br />ft~ adequate number of bridges will be provided to care <br /> <br />for the rn.ilrou.d.. highwuJTs, secondary roads.. for farm crossi.ngs" <br /> <br />, <br />), <br />-'''' <br />~: <br /> <br />and the passap;e of livestock. At the sides of the cut, berms of <br /> <br />20 to 30 feet will be left to insure stability of the bonks and to <br /> <br />t <br />1, <br /> <br />provide space for operation of maintenance machines, <br /> <br />As the prevailing winds are frcm the west, more ~~terial <br /> <br />, <br /> <br />is to be deposited on that side than on the othor, Ditches to in- <br /> <br />u <br />~,~ <br /> <br />tercept surface flows are to be added outside of the spoil banks, <br /> <br />and t~ be provided with frt~uont structures to convey the accumulQt- <br /> <br />ing waters to the bottom of the Main Drain in order to prevent the <br /> <br />back outting of arroyos. Both the Stonn Water Cham181 and the Hain <br /> <br />Drc.in are to be fenced on both sIdes to prevent livestock losses, <br /> <br />as the drain will, duri><g much of the time, hold the only water in <br /> <br />this locality. Cattle guards are to be provided c.t bridge. to <br /> <br />facilitate the passage of cars along the drain. <br /> <br />eOST ES'L'TI\lA TE <br /> <br />The Bureo.u of Reclnmccthn has recently ccntracted drain- <br /> <br />age wcrk at a cost of 6 tc 7 cents per Cll, yd. for ordinary excava- <br /> <br />tion, For the San Luis work, ~~th conditicns possibly not quite so <br /> <br />advr:mtageous, a cost of 8 cents per Cll. yd. has been adopted for <br /> <br />1.4 <br /> <br /> <br /> <br />