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<br />7 <br /> <br />/? <br /> <br />" <br /> <br />4. Results: <br /> <br />It is too early to assign specifically an amount or value to the water <br />salvaged. Before completion of either branch of the drain and before <br />the start of irrigation the drain was conveying 9.2 c.f.s., which <br />certainly was made up in large part from bank storage. Since completion <br />of the drain and start of the irrigation season, meaeurements bave <br />increased to in excess of 33 c.f.s. <br /> <br />At this time no stub laterals have been constructedl however, much <br />interest is indicated by land owners in the srea. Soil Conservation <br />Service personnel indicate that the Norton Drain reasonably should be <br />expected to drain a large part of the area which it can serve. This <br />would assure a substantial increase in both salvaged water and restoration <br />of presently water logged land to cultivation. As these have been the <br />ultimate goals it appears the project can be termed a success in this <br />respect. Inquiries have been received by the Directors conoerning the <br />extension of the West Branch. If this work is done an additional area <br />will be benefited and an additional source of water tapped. <br /> <br />It appears that the original estimate of the amount of water to be <br />salvaged was conservative; however, it will take some time to determine <br />the overall benefits. The State is now installing a gaging station <br />furnished by the District and will keep a record of the quantity of <br />water conveyed in the drain. Also, the State has agreed to take periodic <br />water quality samples. After one year of such measurements and a study <br />of the water quality, a better basis will be obtained on which to relate <br />future projects in the same category. <br /> <br />5. Observations and Recommendations <br /> <br />While the Norton Project has attained the objectives for which it was <br />planned it ie apparent that better planning and design could eliminate <br />some of the problems that developed during and after construction. To <br />make a record of the problems that could bave been avoided with better <br />design and with added experience, the deficiencies and suggested <br />corrections are given below to aid in future projects. <br /> <br />1. Unstable soil conditions and inadequate compaction ,has caused some <br />of the water crossing pipes to wash out. This situation was an <br />aggravation and would have been a more serious maintenance problem <br />if the contrsctor had not done much of the repair work at his own <br />expense. Tbe situation could have been largely avoided if the water <br />crossing pipes were smooth wall for rigidity through the concrete <br />supports with corrugated metal pipe exteneions at lesst 15 feet <br />into the banks. In addition, larger anti seepage collars with large <br /> <br />0587 <br />