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<br />APPENDIX E <br /> <br />Principles and Practices for Prevention and Control of <br />Vector Problems Associated with Reservoirs <br /> <br />I. Prevention and Source Reduction Measures <br /> <br />A. Por MosQuitoes and Other Aquatic Insects <br /> <br />1. All borrow pits and other potential ponding areas <br />associated with construction of the dam, relocation <br />of highways or roads, etc., which are located above <br />maximum pool level should be made self-draining. <br /> <br />2. Prior to impoundage, the reservoir basins should be <br />prepared as follows: <br /> <br />.. The normal summer fluctuation zone of the perDIanent <br />pool Should be completely cleared except for isolated <br />. trees and sparse vegetation along abrupt shorelines <br />which will be exposed to wave action. <br /> <br />b. Dense stands of timber rooted below the normal su_r <br />minimum pool level but extending above that elevation <br />should be cleared. In some situations, such timber <br />may.be felled and securely tied down in lieu of dispoaal. <br /> <br />c. Borrow pits, depressions, marshes, and sloughs which <br />will be flooded by the reservoir at maximum pool level <br />and which would retain water at lower pool levels <br />should be provided with drains to insure complete <br />drainage or fluctuation of water within them. <br /> <br />-d. If the summer fluctuation zone of the permanent pool <br />is limited to a few feet, consideration should be <br />given to ''building out" mosquito-producing areas <br />loc~ted within flight range of population groups or <br />recreational areas through the use of measures such <br />as deepening and/or filling. This would mint.ize <br />the need for repetitive measures for controlling <br />vegetation and mosquito production. <br /> <br />E-l <br />