Laserfiche WebLink
<br /><::) <br />a <br />..- <br />~~ <br />..;:.. <br />\;,Q <br /> <br />102 percent of the 30-year average. <br /> <br />The August and September inflows were 113 and 99 percent of average, respectively. These two months <br />also brought average precipitation to the area. Precipitation reports for both months were <br />97 percent of to 30-year average. By the end of the water year, turbine releases were averaging <br />663 ft% for 24 hours and reservoir storage was 125,827 acre-feet, which was only 987 acre-feet above <br />the 30-year average. . <br /> <br />The total 1998 water year undepleted inflow of 338,800 acre-feet was 35,220 acre-feet below the 1966- <br />1995 average inflow of 374,020 acre-feet. Blue River, Dillon Reservoir, and Green Mountain Reservoir <br />operations for water year 1998 are summarized in table 2. <br /> <br />Gross generation at the Green Mountain Power Plant totaled 57,200,000 kilowatt-hours for water year <br />1998, which represents 102 percent of the average. <br /> <br />Willow Creek Reservoir <br /> <br />Completed in 1953, Willow Creek Reservoir has a total storage capacity of 10,600 acre-feet. The <br />uncontrolled spillway, located at the left abutnlent, has a capacity of 3,200fels. The Willow Creek. <br />Feeder Canal begins at the left abutment with a capacity of 400 ft3/s for pumping to Granby Reservoir. <br /> <br />Reservoir carryover storage coming into water year 1998 was 9,400 acre-feet. This carryover storage <br />was 5,400 acre-feet above the 30-year average. <br /> <br />October-January inflows were higher than average at 125 percent of average. Precipitation for the same <br />period was average, at 100 percent of the 30-year average. <br /> <br />The February 1 snow-water content was only 79 percent of average, which resulted in an April-July <br />runoff forecast of 45,000 acre-feet. By March 1, snow-water content had increase to 104 percent of <br />average and the April-July runoff forecast increased to 50,000 acre-feet. <br /> <br />October through March precipitation in the Willow Creek watershed was extremelylow. The percentage <br />of the 1966-.1995 average was a low 39 percent. The month of March brought only <br />0.48 inches of precipitation, aggravating the snow-water content situation. Snowpack water content for <br />the April 1 measurement was 76 percent of average. The April-July snowmelt runoff forecast decreased <br />substantially to 35,000 acre-feet, although inflows were reported at 150 percent of average for March. <br />Total inflow into Willow Creek, from October to March was 7,900 acre-feet, 139 percent of average. <br /> <br />Inflows were reported at 78 percent of average for the month of April. April was also another dry month <br />for the watershed, reporting less than an inch of precipitation, and only 52 percent of average. The low <br />precipitation reflected on the snow-pack water content, which was reported at only <br />84 percent of average. The May-July runoff forecast dropped even more, down to 32,000 acre-feet. <br /> <br />The situation did not improve during May. Precipitation for the month was only 54 percent of average, <br />while the inflow remained low at 15,100 acre-feet, or 71 percent of average. By June 1, the snow-pack <br />had melted. Inflow peaked at 412 ft3/s on May 22, 1998, earlier and lower than nonnal. <br /> <br />The month of June brought some relief from the dry conditions. Precipitation was higher than average at <br /> <br />9 <br /> <br />. <br />