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WSP00886
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Last modified
1/26/2010 12:28:18 PM
Creation date
10/11/2006 9:59:58 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8407
Description
Platte River Basin - River Basin General Publications
State
CO
Basin
South Platte
Water Division
1
Date
4/16/1990
Author
BOR
Title
Annual Operating Plans - North Platte Project Water Years 1989-1990
Water Supply Pro - Doc Type
Report/Study
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<br />2 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />'I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />recorded 12.5 inches on April 1, Wi 11 ow Creek 8.2 inches on March 1, <br />Granby 9. 7 inches on March 1, and Lake Estes 8.4 inches on I~arch 1. <br />Percent of normal ranged from 84 percent at the Green Mountain watershed <br />to 99 percent at the Wi 11 ow Creek watershed. <br /> <br />Snow courses for watersheds within the Project averaged only 52 percent <br />of normal snowpack water content on May 1. All watersheds, except for <br />Green Mountain, received much below normal precipitation in April. The <br />W ill ow Creek and Lake Granby watersheds recorded snow-water accumu 1 at ions <br />on May 1 of only 32 percent of normal and 50 percent of normal, <br />respectively. The May 1 snow-water content for the Green Mountain <br />watershed was 71 percent of normal. The Lake Estes watershed snow-water <br />content was 51 percent of average on May 1. <br /> <br />Steady rainfall occurred in the Lake Estes area during May 13 through <br />May 17 with 1.20 inches recorded over the five days. However, <br />precipitation continued to be below normal over the Project and averaged <br />only 63 percent of average. Precipitation was below normal over the <br />Project area in. June, with Wi 11 ow Creek and Lake Granby at 73 percent of <br />average, Green Mountain at 72 percent of average, and Lake Estes at 86 <br />percent of average. July through September precipitation was varied on <br />all watersheds. The Green Mountain watershed recorded 111 percent of <br />average precipitation in July and only 42 percent of average in <br />September. A total of only 3.89 inches of precipitation was recorded on <br />the Willow Creek and Lake Granby watersheds from July through September <br />and this was 72 percent of average. Precipitation in the Lake Estes <br />area was near average for the three months, at 98 percent of average. <br /> <br />Temperatures were much above normal for the first three weeks of April. <br />Record temperatures were set in Denver from April 21 through April 23 <br />with 890, 880, and 850 respectively, being recorded. Temperatures were <br />above normal for May with record temperatures bei ng set in Denver at <br />870 on May 7 (tied 115 year record) and on May 23 at 930 (new record). <br />June temperatures were near average but a record heat wave hit the <br />first week in July with Denver setting a record of five consecutive <br />days of over 1000. <br /> <br />For water year 1989, the minimum recorded temperatures were -460F at <br />Green Mountain Reservoir on February 7, -410F at Lake Granby on February <br />7, and -350F at Lake Estes on February 3. Overall, winter temperatures <br />were near normal for the water year, except for a very cold February. <br /> <br />V ari ed summer temperatures were recorded over the ent ire Project, with <br />temperatures peaking in early July. The maximum temperatures was 890F <br />on July 5 and 6 at Green Mountain Reservoir. The maximum temperature at <br />Lake Granby occurred on July 6 and was 850F, and Lake Estes recorded a <br />maximum temperature of 960F on July 8. <br /> <br />Alva B. Adams Tunnel (Adams Tunnel) diversions totaled 276,700 acre-feet <br />(118 percent of average) for the water year. <br /> <br />Seasonal water deliveries (November 1988-September 1989) were 137 percent <br />of average for the.Project. <br /> <br />Project generation for the water year was above average at 104 percent of <br />average. <br />
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