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<br /> <br />. <br /> <br />CHAPTER III <br /> <br />DESIGNS AND ESTIMATES <br /> <br />Gould Canal <br /> <br />Project work on the Gould Canal would include construction of <br />1.8 miles of structure~ The canal enlargement aside from the structures <br />would be accomplished by the water users prior to the beginning of the <br />project development period. <br /> <br />Structures to be constructed as part of the project include a <br />chute from Fruitland Canal to Castle Canyon and a check drop at the <br />junction of Castle Canyon and Gould Canal. In addition, two siphons <br />which presently limit the carrying capacity of the canal would be <br />replaced. A drop or chute structure would be constructed immediately <br />preceding each of the siphons. Data on the structures are shown below. <br /> <br /> Type of Length Capacity <br /> structure (feet) ( second-feet) <br /> Open rectangular chute 1,970 120 <br /> Check drop 60 120 <br /> Siphon and chute~-42-inch <br /> diameter concrete 3,920 90 <br /> Siphon and chute--30-inch <br />. diameter concrete 3,800 40 <br /> <br />. <br /> <br />The water users ~Iould enlarge the ll-mile section of the Gould <br />Canal beyond the point where Fruitland Canal releases are intercepted <br />from Castle Canyon. This section is of earth construction. With enlarge- <br />ment the canal 8ection would bave an initial capacity of 120 8econd-feet <br />and a terminal capacity of 15 second-feet. <br /> <br />Laterals <br /> <br />The lateral system for the Upper Fruitland Mesa and Upper <br />Iron Creek areas tentatively includes about 12 miles of natural dra1n- <br />ages to be used as main laterals for water released from the Fruitland <br />Canal and about 22 miles of small contour ditches extending from the <br />drainages to the lower farm units. Maximum releases to the natural <br />drainages would range from 5 to 20 second-feet. Designs and cost esti- <br />mates were prepared for a representative portion of the area for use in <br />estimating the total construction cost of the lateral system. <br /> <br />Land drains <br /> <br />As mentioned in Chapter II and discussed more fully in Chapter <br />V, drainage needs of the project are expected to be moderate but cannot <br />be definitely determined until the irrigation water is applied. Conse- <br />quently, drainage structures have not been specifically located nor <br />designed bu-t allowances to cover possible requirements for 5 miles of <br />drains are made in the cost estimates. <br /> <br />23 <br />