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<br />.. <br />J <br /> <br />.. <br /> <br />Part 4 - Reservoir Data (Contd) <br /> <br />" <br /> <br />feet and provide 3~5,000 acre feet for conservation storage and 270,000 <br /> <br />acre feet for flood control. The dam was constructed, however, at the <br /> <br />site originally surveyed, and with the storage capacity shown in Table 15 <br /> <br /> <br />(exoept as diminished by ths volumes of sediment deposited during <br /> <br /> <br />construction), thus providing a flood pool abovs Elevation 3851 of initial <br /> <br />capaoity 231,150 acre feet and a conservation pool below Elevation 3851 of <br /> <br />initial capacity 420,068 aore feet, <br /> <br />Partially completed John Martin Reservoir, with a total initial <br /> <br />capacity (to the top of the constructed concrete spillway) of 300,585 <br /> <br />acre feet, has been operated since January 1943 under a conservation <br /> <br />pool limitation at Elevation 3815, or an initial storage capacity prior to <br /> <br />. <br /> <br />siltation of 122,118 acre feet. As a result of the high-water of 1942, <br /> <br />before the spillway section of the dam was completed, and during the period <br /> <br />of operation from January 1943 to July 1944, the quantities of sediment <br /> <br />deposited in the conservation pool accumulated to a total of 17,958 acre <br /> <br />feet, distributed therein as follows. <br /> Elevation Gage Height . Ini tiel Capacity Capacity Sediment <br /> ( Feet) July 1944 <br /> (Feet ) (Aore Feet) (Acre Feet) (Acre Feet) <br /> 3851 91 420,068 402,110 17,958 <br /> 3840 80 300,585 263,615 16,970 <br /> 3815 55 122,118 105,811 16,307 <br /> 3770 10 3,756 0 3,756 <br /> The above distribution was based on a table prepared from the <br />survey of July 1944. Surveyli' in 1945 and subsequent observations indicate <br /> <br />that this table was essentially correct through 1946. <br /> <br />'. <br /> <br />w25- <br />