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_ • ___ _ ? <br />- ; <br /> <br />. ? ? <br />The plan also describes the overall management plan for the dams and reservoirs. <br />It anticipates that there will be only minimum flows for the 2006 navigation season and it <br />could be shortened 15 to 58 days, depending on runoff this winter and spring. A final <br />d.etermination on season length will be made July 1, 2006. <br />Steady to rising reservoir levels during the spring fish spawn are likely if there is <br />n.ormal or above normal runoff. Howeyer, continued drought conditions may not make <br />tllat possible at all the upper three reservoirs. To the extent reasonably possible, the <br />C'orps will set releases at Garrison Dam to result in a steady to rising pool during April <br />and May. The ability to'provide such conditions depends on the volume, time and <br />distribution of the runoff from melting snow on the plains and in the mountains of <br />112ontana and Wyoming: <br />The draft 2005-2006 Annual Operating Plan with a detailed description of the <br />spring pulses is posted on the Northwestern Division website: www.nwd.usace.armv.mil <br />and is also available in hard copy by writing to: Water Management Division, U.S. Army <br />C'orps of Engineers, 12565 West Center Road, Omaha, NE 68144. Comments on the <br />draft Flan and thc suppler?ient to the Master Water Control Manual will be taken through <br />I'1ec.16. <br />Gavins Point reservoir will remain near elevation 1207 feet above mean sea level <br />(insl) during December. Releases averaged 11,000 cfs in November compared to the <br />n0rma132,900 cfs. Releases were slightly,increased on Nov. 3 as tributary flows declined, <br />amd again late in the month as temperatures dropped well below freezing. They will be <br />rriaintained near 12,500 cfs in December, though furkher adjustments may be necessary <br />depending on icing conditions. <br />Fort Randall releases averaged 9,300 cfs in November. They will average <br />11,400 cfs in December as needed to maintain Gavins Point reservoir near its desired <br />el.evation. Fort Randall reservoir ended November at 1338.7 feet msl. It will end <br />December near elevation 1341 feet msl. <br />Big Bend reservoir will remain in its normal elevation range of 1420 to 1421 feet. <br />Releases will be adjusted to meet hydropower needs. <br />Oahe reservoir rose nearly 2 feet during November, ending the month at elevation <br />1:575.6 feet msl. It will rise half a foot to 1576.1 feet in December, ending the month 23.5 <br />feet below average. The reservoir is at essentially the same level as it was last year at this <br />tvme. ' <br /> <br />2