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<br />. <br /> <br />. <br /> <br />TABLE 4 <br />RELATIVE MONTHLY VALUES OF ENERGY <br />BASED ON FUEL CONSERVATION SALES RATE <br /> <br />(Prepared by Western Area Power Administration) <br /> <br />Month <br /> <br />Representative <br />Mill Rate <br /> <br />Relative <br />Percent <br /> <br />January <br />February <br />March <br />Apr il <br />May <br />June <br />July <br />August <br />September <br />October <br />November <br />December <br /> <br />20 <br />20 <br />18 <br />18 <br />15 <br />15 <br />25 <br />25 <br />25 <br />16 <br />16 <br />20 <br /> <br />8.58 <br />8.58 <br />7..72 <br />7.73 <br />6.44 <br />6.44 <br />10.73 <br />10.73 <br />10.73 <br />6.87 <br />6.87 <br />8.58 <br /> <br />100.00 <br /> <br />2.3.6 Water Quality Aspects. With regard to water <br />quality, the redistribution of excess water releases can <br />provide water quality benefits. Changes that accompany <br />widely fluctuating river flows have notable adverse effects <br />on the quality of the river water for municipal, industrial, <br />and agricultural purposes, river diversion works, fish and <br />wildlife and their habitats, and water oriented recreation. <br />More uniform flood control releases will reduce suspended and <br />settleable matter and turbidity and will provide for more <br />uniform dissolved solids and salinity concentrations. The <br />most dramatic and adverse changes in suspended and settleable <br />solids and turbidity occur with abrupt increases in river <br />flows which induce riverbed scouring and riverbank erosion. <br /> <br />Dissolved solids and salinity concentrations are <br />significantly lower with the occurrence of excess flows. <br />Excess flows also significantly diminish the normal seasonal <br />variations in concentrations that occur with river flows to <br />meet only downstream water needs. Shifts from flood control <br />releases to river flows to meet only water needs produce <br />abrupt increases in concentrations because of the lesser <br />assimilative capacity of the lower flows to dilute irrigation <br />return flows and because of salt contributions from backwater <br />areas and bank storage. Under river flows for downstream <br />water needs only, river salinity at Imperial Dam and the <br />International Border is the highest for the year from october <br />through January, the low flow/low water use period. <br /> <br />-19- <br />