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<br />I <br />I <br />I <br />,I <br />I <br />I I <br />'I <br />I <br />I <br />II <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />, II <br /> <br />V. PLAN OF DEVELOPMENT <br /> <br />PHYSICAL PLAN <br /> <br />Features and layout of the first stage of the South Rifle Division <br />are shown on the Project Map, The principal components of the pro- <br />posed water system consist of: <br /> <br />. River intake and presedimentation works <br />- 700 gpm <br /> <br />. River pumping station - 700 gpm <br /> <br />. Water treatment plant - 1,0 mgd <br />. Treated water pumping station - 700 gpm <br /> <br />. Treated water storage tank - 1.0 mg <br /> <br />. Trunk pipeline - 8" and 14" diameter <br /> <br />The intake pipeline between the intake structure and the grit chamber <br />would be located below the river low water level to prevent surface <br />slicks of oil, grease and other contaminants from entering the treat- <br />ment plant, Consideration was given to supplying the water system <br />from one of the existing irrigation ditches serving the area, This <br />alternative was rejected for several reasons. A ditch would not ex- <br />clude oil and other surface contaminants; would be difficult to protect <br />from freezing in the winter; would be vunerable to flooding; and <br />would be more difficult to clean of silt than the proposed presediment <br />works. <br /> <br />The proposed water treatment system includes a grit chamber associated <br />with the river intake structure which would settle out the major <br /> <br />V-l <br />