WSP12946

• File Number: 8040.800
• Description: Water Resources for Colorado
• State: CO
• Date: 5/1/2005
• Author: US Dept of Agriculture - Natural Resoruces Conservation Service
• Title: Colorado Basin Outlook Report May 1, 2005
• Water Supply Pro - Doc Type: Data

==~=__=_=___..*..=_=====_=.==_=======_=.*__====_=_=._===_====D=__=.=.==_=~..==.D..===..__K_=...=._.._.__.===------=----=_.._.=-_..

ARKANSAS RIVER BASIN
Streamflow Forecasts - May 1, 2005

======___==____====_=============_=====..___====__=____.=_====__._=====_=..==..=.a=._.=.=_.==_.__~=_.a_=.-..~.-..=..=_.=_..===_...

<<=g_=a.. Drier .......--. Future Conditions Wetter -=-.->>
Forecast Point Forecast ==a=_====...____.... Chance Of Exceeding * ===.-=...-..-...-...-.......-....-
period 90~ 70~ 50% 30% 10% 30-Yr Avg.
(lOOOAF) (1000AF) ( 1000AF) (~ AVG.) ( 1000AF) (1000AF) ( 1000AF)
==__============================_==================a===_==_===~=....=_ ~-=-==..=--==...._......_=-_. =----=-.----==========.-=====.-==.-..-
Chalk Creek nr Nathrop APR-SEP 12.0 19.0 23 85 27 34 27
Arkansas River at Salida APR-SEP 230 275 310 100 345 390 310
Grape Creek nr Westcliffe APR-SEP 13.0 21 26 133 31 39 19.6
Pueblo Reservoir Inflow APR-SEP 320 390 435 101 480 550 430
Huerfano River nr Redwing APR-SEP 18.4 21 23 148 25 28 15.5
Cucharas River nr La Veta APR-SEP 17.0 20 22 169 24 27 13.0
Trinidad Lake Inflow APR-SEP 51 62 70 159 78 89 44

==_=_====_======..=====_=====_=====___...__=====..====__=_=...===========..=.....==-=_===8.===--==-=....==....-====_._=a.___==_.==_=__=__

===*_.====__==_========================___=====_=====z=_===_...==_=====_==....._=====__===.__._.=___a_=__=_==-..-=.-..-.--...--.--

ARKANSAS RIVER BASIN
Reservoir Storage (1000 AF) - End of April

ARKANSAS RIVER BAS IN
Watershed snowpack Analysis - May 1. 2005

_.=================_========_...====_=====....====.=====____==_=_.._____.. ___=_==_=..._=__a...__._=_=_.____=___=-...=_._._.==._.__a

Usable I
Capaci ty
I

*** Usable Storage ***
This Last
Year Year Avg

Watershed

Number
of
Data Sites

This Year as % of

Reservoir

Last Yr Average

ADOBE 70.0 0,0 0.0 34.3 UPPER ARKANSAS BASIN 9 104 85
CLEAR CREEK 11.0 9.0 8.4 6.0 CUCIlARAS & HUERFANO RIVER 4 158 173
GREAT PLAINS 150.0 0.0 0.0 40.6 PURGATOIRE RIVER BASIN 2 194 234
HOLBROOK 7.0 1.5 0.0 4.7 TOTAL ARKANSAS RIVER BASI 14 123 107
HORSE CREEK 28.0 0.0 0.0 11.3
JOHN MARTIN 335.7 81.6 12.4 123.7
LAKE HENRY 8.0 8.5 6.4 6.0
MEREDITH 42.0 37.7 24.0 20.1
PUEBLO 236.7 136.6 113.5 163.5
TRINIDAD 72.3 31.5 25.4 29,1
TURQUOISE 126.6 71.0 64.2 70.8
TWIN LAKES 86,0 35.8 37.1 41.3

==__.===_.a========.=~A.~==_=.======_=~=_===__====_=S.....====_====...=_=.a=.==....===..c====....-==--==.=-=========.==-=-==-===-=

* 90%. 70~. 50~. 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.