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<br />'VblG..g-(J/ <br /> <br />. <br /> <br />. <br /> <br />Good progress is being made on Rifle Gap Dam and other features of <br /> <br />Silt project. <br /> <br />Construction is well advanced into final steps on the second 345-kv. <br /> <br />line from Glen Canyon to Pinnacle Peak and the Curecanti to Poncha section <br /> <br />of the Curecanti to Midway line. Construction is just getting well under <br /> <br />way on the Poncha to Midway section of that line. <br /> <br />y; <br />Y COLORADO RIVER RUNOFF FORECAST <br /> <br />Precipitation over the Upper Colorado River Basin for January, Febru- <br /> <br />ary, and March was only some 40 percent of normal. The month of March was <br /> <br />even less or about 30 percent of normal. Furthermore, ~e have experienced <br /> <br />unusually warm temperatures, particularly during March, so that the snow- <br /> <br />pack in the high mountains has shrunk considerably according to snow <br /> <br />course measurements. Therefore, the April 1 forecast for April through <br /> <br />July runoff is only 4,500,000 acre-feet, as compared with the January I <br /> <br />forecast of 9,300,000 acre-feet. <br /> <br />The prospect of a rather low April through July runoff is not as <br /> <br />serious as it might appear. With the above normal winter temperatures <br /> <br />this year, the measured runoff for the first six months of the water year <br /> <br />(October 1965 through March 1966) has been about 3,900,000 acre-feet or <br /> <br />1,300,000 acre-feet above average. Therefore, it is probable that this <br /> <br />already-measured runoff along with the forecast amount of 4,500,000 <br /> <br />acre-feet for April through July could result in a water year total of <br /> <br />9,300,000 acre-feet or about 75 percent of the longtime average. <br /> <br />With a total water year runoff of this magnitude, Lake Mead would <br /> <br />not fall below its rated-head level, Lake Powell would rise somewhat <br /> <br />2 <br />