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<br />1 <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />HYDROLOGY <br /> <br />IJ-34 <br /> <br />3. During the summer months (July and August), the flow in the river <br />is approximately 100 cfs. This is an adequate flow which the <br />radial gate can handle without sand accumulation in the primary <br />screen channel. A problem we have found during this time is moss <br />and algae plugging the primary and secondary intake screens. <br />During the worst plugging occurrences, the screens have to be <br />cleaned every two or three hours. When the screens become <br />plugged, the reservoir level drops. Cleaning the screens allows a <br />higher rate of inflow into the reservoir causing even more moss to <br />be pulled onto the screens. .When the flow is lowered to 50 cfs, <br />the primary intake screens are cleaned with wire brushes and high <br />pressure hoses. <br /> <br />4. During the fall our main problem is still with the moss until the <br />water temperature drops below 15 degrees centigrade. This usually <br />occurs around mid-October. <br /> <br />5. The following are some operational problems which we have observed <br />in the last year of operation: <br /> <br />a. People climb out on the channel structure for fishing and <br />swimming. <br /> <br />b. Children play on the safety chains located upstream from the <br />intake structure. <br /> <br /> <br />c. Algae blooms due to the rechanneled river due to the shallow, <br />wide river channel. <br /> <br />d. The increased hardness of river water in the winter due to <br />return flows making up the bulk of the river flow. <br />