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content measurement was 105 percent of average, which resulted in an April-July most- probable-runoff forecast volume of 95,000 acre-feet. Precipitation over the Big Thompson River Basin in February continued well below average at 33 percent. March precipitation for the Lake Estes watershed was also below average at 52 percent of the 1966-1995 average. April 1 snow-pack water content measurements were 62 percent of average. The April-July most probable runoff forecast volume decreased to 65,000 acre-feet. April was extremely wet, with total precipitation at 6.56 inches or 345 percent of average. However, inflows were 143 percent of average. May 1 snow water content measurements increased to 94 percent of average and the April-July most probable runoff forecast volume was increased to 95,000 acre-feet. May was wet with precipitation at 3.26 inches or 130 percent of average. The Big Thompson River inflow, in excess of the minimum required outflow below Lake Estes, was diverted as skim water or priority water through Olympus Tunnel on May 1 and continued when Olympus Tunnel capacity was available through September. For water year 1999, there were 18,400 acre- feet of skim at Olympus Tunnel, and 28,563 acre-feet of skim at Dille for a total of 47,000 acre- feet skim. However for this runoff season, 51,674 acre-feet of priority Eastern Slope water was stored in either Carter Lake or Horsetooth Reservoir, a record year since the beginning of the project. Operation of skim this water year was 122 percent of average. The inflow peaked on June 19 at 956 ft3 fs. Releases to the river below Olympus Dam peaked at 517 ft3fs on June 16, 1999. June precipitation was 2.31 inches or 124 percent of average. Total inflow for June was estimated at 45068 acre-feet or 138 percent of average. Total August precipitation at Lake Estes was measure at 3.90 inches, which was 195 percent of average. Total precipitation for the water year (October-September) was 26.11 inches or 149 percent of average. The inflow above Lake Estes was 120,100 acre-feet for water year 1999, and this was 133 percent of average. Estes Power Plant generation totaled 71,800,000 kilowatt-hours for the water year and was 31,100,000 kilowatt-hours below average. Carter Lake Completed in 1952 with three dams, Carter Lake has a total storage capacity of 112,200 acre- feet. Inflow of Project water to Carter Lake is from the Flatiron Pumping Plant with a capacity of up to 400 ft3/s. ]4 Carter Lake storage content at the beginning of the water year was 64,028 acre-feet, which was well above the 30-year average of 54,440 acre-feet.