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<br />3J190 <br /> <br />YAMPAlWHITE BASIN <br /> <br />Jun-01 <br /> <br />t <br />y,; <br /> <br />., <br /> <br />Basinwide Conditions Assessment <br />The SWSI value of -0,9 indicates that for May the <br />basin water supplies were near normal. Flow at the gaging <br />station Yampa River at Steamboat was 1,552 cfs, as <br />compared to the long-term average of 1,627 cfs, <br />While early May brought much needed snow to the <br />basin, by the end of the month near record temperatures <br />had melted much of the upper level snowpack, Runoff for all <br />the major rivers and streams peaked during May, many at <br />least three weeks sooner then normal. By the end of the <br />month most snowtel sites were dry. Basin-wide precipitation <br />Was 82% of average and oniy 72% of last May, Fortunately, <br />most reservoirs are nearly full. <br /> <br />Outlook <br />The June 1" forecast for the most probable spring <br />runoff based on current conditions are; 56% of average for <br />the North Piatte River near Northgate, 66% of average for <br />the White River near Meeker, 62% for the Little Snake River <br />near Lily and 68% of average for the Yampa River near <br />Maybell. These predictions are the same or slightly lower <br />then those from the May 1" forecast. At the end of May, the' <br />snowpack was only 31 % of average for the North Platte <br />drainage and 29% of average for the White and Yampa <br />Rivers, Stream fiows are expected to decrease rapidly over <br />the next month. <br /> <br />Administrative/Manaaement Concerns <br />Many of the smaller streams and .tributaries are <br />experiencing rapidly declining stream flows. Administration <br />has begun on many systems. Without substantial rainfall <br />these systems will be under administration for the remainder <br />of the summer, <br /> <br />Public Use Imoacts <br />River fiows are beginning to decline after the early <br />runoff peaks, Water-related activities that depend on high <br />river fiows will have a shortened season this year, Releases <br />from irrigation reservoirs are likely to begin earlier than <br />normal. <br /> <br />w <br />~ <br />~' <br />> <br />~ ' <br />. <br /> <br /> <br />Y.4Io.rPAWiTEBASlNS\o\ISI H$TCR{ <br /> <br />~ <br />~ , <br /> <br />>., <br />~ <br />o <br /> <br />~ <br /> <br />. <br /> <br />-4 ............._...'"._.____". ___.__..._.. __._. ___ ..__.___._,.. ___.__.. <br />Jen.92 .krl-93 Jm.94 Ja>.ll5 Js>8a .hnS7 .Jon.{I8 JInQ9 JIn..OO JIn.(l.1 <br />""","'YEAR <br /> <br />YI>NPA RIVER AT ~T, RDN. BY-WATER YEb.R <br /> <br />700,000 <br /> <br /> . <br /> /' .--- <br /> I <br /> / <br /> .' j / I <br />. If <br /> .-d ;/' <br /> I <br /> <br />El<X\OOO <br /> <br />:l <br />.4 <br /> <br />~ <br />~ 5OO,<XXl <br />" <br />~- 400,000 <br />~ <br />~ <br />~ 300,000 <br />S <br />~ 200,000 <br />::> <br />" <br />100,CX::O <br /> <br /> <br />o <br />Oct . N)v Dee ..Ian <br /> <br />Fe!> M:Ir9'!/'irl May JLI'le.l!Jly h.Ig Sept. <br /> <br />-e-\llJET(19B4) <br /> <br />-+-CRY(1977) <br /> <br />~AVG <br /> <br />~2001 <br /> <br /> , <br /> ,'1 <br /> :i <br /> } <br /> .-{ <br /> ^ <br /> ;j <br /> ~ <br /> ~ <br /> ~ <br /> ;" <br /> ,j <br /> , <br /> 1 <br />8 A <br />, <br /> <br />