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======~~===================~D===.=============_=====a==--====.-=~_a.========_=_==._*==__.==_a_=====================__============= SOUTH PLATTE RIVER BASIN Streamflow Forecasts- April 1, 2003 Forecast Point =________aa===.=__====__===_=__===____=____===____=__===-===____.__a==_.=~_.=_==_..=____.=_=...====__.===.__---==.-=-==-=====__.=m Future Conditions Forecast Period <<=~~-=- Drier .__~_= ====~_========_z_=__====.=_=======_==_._=~=~=_===__=__----=-==---==---===---=----==-....___======______._.c_.==___._.=_.===_=_==== Wetter ==-=_>> , I =-=.======...=-===.~ Chance Of Exceeding * ======a=m=_=_==___===_ I 90% 70% 50% (Most Probable) 30% 10% I 30-Yr Avg. I (lOOOAF) (1000AF) I (1000AF) (% AVG.) I (1000AF) (lOOOAF) I (1000AF) ==-====.==...==--==...==--_._====-====..==_._-====----===---==--====I==--=...----_==a_==----I=========_=====._===___=...==.=...=== Antero Reservoir Inflow APR-JUL 2 _ 8 4.2 I 5.4 42 I 7.0 10.3 13.0 Spinney Mountain Reservoir Inflow APR-JUL 18.9 25 I 30 75 I 36 48 40 ElevenmileCanyon Reservoir .Inflow APR-JUL 18.1 25 I 30 73 I 35 42 41 Cheesman Lake Inflow APR-JUL 46 56 I 65 73 I 75 92 89 South Platte River at South Platte APR-SEP 111 152 I 180 78 I 208 248 230 Bear Creek at Morrison APR-SEP 13.2 19.0 I 23 74 I 27 33 31 Clear Creek at Golden APR-SEP 78 103 I 120 90 I 137 162 134 St. Vrain Creek at Lyons APR-SEP 53 65 I 73 87 I 81 93 84 Boulder Creek nr Orodell APR-SEP 42 49 I 54 102 I 59 66 53 South Boulder nr Eldorado Spgs APR-SEP 31 37 I 42 91 I 47,__ 53 46 Big Thompson River at mouth nr Drake APR-SEP 83 99 I 110 94 I 121 137 117 Cache La Poudre at Canyon Mouth APR-SEP 177 230 I 265 96 I 300 355 275 SOUTH PLATTE RIVER BASIN Reservoir Storage (1000 AF) - End of March I I =====-----=====---=--_.=-----===----=_._--...._---=._-______a__..__...._=__..___=__._.___________._.__._.__.._=___c....._=__...... Usable I *** Usable Storage *** I Number This Year as % of Capacity' This Last I Watershed of _===_...=____==== I Year Year Avg' Data Sites Last Yr Average ===-=-===--==_.=--=====--=-=-=========--=._-._.==-==..-==--_...__.=..=..I.========....._...=====-=====-====z======...=..===c====== I I I I , I I I I , I I , I I I , I I I I I I I I I , I I I I Reservoir ANTERO BARR LAKE BLACK HOLLOW BOYD LAKE CACHE LA POUDRE ~TER CHAMBERS LAKE CHEESMAN COBB LAKE ELEVEN MILE EMPIRE FOSSIL CREEK GROSS HALLIGAN HORSECREEK HORSETOOTH JACKSON JULESBURG LAKE LOVELAND LONE TREE MARIANO MARSHALL MARSTON MILTON POINT OF ROCKS PREWITT RIVERSIDE SPINNEY MOUNTAIN STANDLEY TERRY LAKE UNION WINDSOR 20.0 32.0 8.0 49.0 10.0 108.9 9.0 79.0 34.0 97.8 38.0 12.0 41.8 6.4 16.0 149.7 35.0 28.0 14.0 9.0 6.0 10.0 13.0 24.0 70.0 33.0 63.1 48.7 42.0 8.0 13.0 19.0 0.0 20.7 2.0 6.0 3.5 99.9 1.7 46.2 2.5 44.9 26.4 8.3 16.5 3.8 1.4 29.9 24.7 21.7 8.5 8.5 0.5 4.9 9.7 4.9 38.1 8.9 46.4 12.6 20.7 2.5 6.3 0.8 20.0 27.4 2.7 20.5 4.2 107.5 4.0 59.0 6.8 99.6 33.7 9.9 19.2 3.5 14.5 26.5 26.1 18.2 10.3 8.7 3.2 5.0 7.7 21.2 68.2 21.2 55.6 23.3 31.1 5.1 9.6 6.5 15.9 27.9 4.0 33.0 8.6 100.9 3.3 60.8 13.9 96.4 31.8 7.9 23.9 4.7 13.9 119.1 29.9 20.8 9.0 7.2 4.5 6.0 13.3 18.3 68.8 25.0 58.2 32.1 34.6 5.4 11.1 12.4 SOUTH PLATTE RIVER BASIN Watershed SnoWpack Analysis - April 1, 2003 BIG THOMPSON BASIN BOULDER CREEK BASIN CACHE LA POUDRE BASIN CLEAR CREEK BASIN SAINT VRAIN BASIN UPPER SOUTH PLATTE BASIN TOTAL SOUTH PLATTE BASIN 6 5 8 4 4 15 41 202 261 177 219 238 204 211 122 130 116 116 126 93 114 a..=.===....=....=...==a=...===__..==...===........===.===..==...==---===-=.....===_..a=_....=..__.====.....__.....=......_...=... * 90%, 70'. 30%, and 10% chances of exceeding are the probabilities that the actual volume.will exceed the volumes in the table. The average is computed for the 1971-2000 base period. (1) - The values listed under the 10% and 90% Chance of Exceeding are actually 5% and 95% exceedance levels. (2) - The value is natural volume - actual volume may be affected by upstream water management.