WSP12943

• File Number: 8040.800
• Description: Water Resources for Colorado
• State: CO
• Date: 4/1/2003
• Author: US Dept of Agriculture - Natural Resoruces Conservation Service
• Title: Colorado Basin Outlook Report April 1, 2003
• Water Supply Pro - Doc Type: Data

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UPPER COLORADO RIVER BASIN
Streamflow Forecasts - April 1, 2003

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<<~==c__ Drier a=_=_. Future Conditions Wetter --.==->> I
I
Forecast Point Forecast ==-=======_._-=====-- Chance Of Exceeding * ._==--===_.===----==== I
Period 90t 70t sot (Most Probable) 30t lot I 30-Yr Avg.
(1000AF) (1000AF) (1000AF) (t AVG.) I (1000AF) (1000AF) I (1000AF)
======-===-==========-=-==========,=.==========-===-===---==-_.=--=_.= ===___...===_.====__m==I =====_=======_========c========_=====
Lake Granby Inflow APR-JUL 172 202 225 100 I 251 294 225
I
willow Creek Reservoir Inflow APR-JUL 38 48 55 108 I 63 75 51
I
Williams Fork Reservoir inflow APR-JUL 79 91 100 105 I 109 124 95
Dillon ReserVoir Inflow I
APR-JUL 121 150 170 102 I 191 221 167
Green Mountain Reservoir inflow APR-JUL 254 281 300 107 320 349 280
Muddy Creek blw Wolford Mtn. Resv. APR-JUL 34 44 52 87 62 79 60
Eagle River blw Gypsum APR-JUL 207 251 285 85 324 392 335
Colorado River nr Dotsero APR-JUL 930 1210 1400 97 1590 1870 1440
Ruedi Reservoir Inflow APR-JUL 84 101 115 82 130 157 141
Roaring Fork at Glenwood Springs APR-JUL 409 490 550 78 613 712 710
Colorado River nr Cameo APR-JUL 1420 1850 2150 89 2450 2880 2420

.
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UPPER COLORADO RIVER BASIN
Reservoir Storage (1000 AF) - End of March

UPPER COLORADO RIVER BASIN
Watershed Snowpack Analysis - April 1, 2003

GREEN MOUNTAIN

I
I .
...======-=_.=.=====--===-============-========.=--===-~-==--=.=~==_.====---.========...===_..=.==-=--=====-====--=====-==.=-=====
Usable I *** Usable Storage *** I Number This Year as t of
Capacity I This Last I Watershed of _=====____=_=_=_.
I Year Year Avg I Data Sites Last Yr Average
========..._._======_s._=====___._===_.___======___...._--====--_==__~.=I...__.aD==____===.=__..=====._==__.====___.==-========_._.
DILLON 250.8 120.8 194.9 214.5 I BLUE RIVER BASIN 8 165 113
I
263.7 I
I
59.8 I
I
22.5 I
I
61.9 I
I
13.1 I
I
54.8 I
I
6.8 I
I

Reservoir

LAKE GRANBY

465.6

15.4

167.6

UPPER COLORADO RIVER BASI

33

169

108

139.0

29.4

64.8

MUDDY CREEK BASIN

4

137

92

HOMESTAKE

43.0

17.0

25.0

PLATEAU CREEK BASIN

2

160

85

RUEDI

102.0

46.1

62.5

ROARING FORK BASIN

7

133

85

VEGA

32.0

5.1

10.2

WILLIAMS FORK BASIN

4

183

113

WILLIAMS FORK

96.8

7.7

53.4

WILLOW CREEK BASIN

4

191

122

WILLOW CREEK

9.0

7.5

7.1

TOTAL COLORADO RIVER BASI

42

161

101

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* 90t, 70t, 30t, and lOt 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 90t Chance of Exceeding are actually 5t and 95t exceedance levels.
(2) - The value is natural volume - actual volume may be atfected by upstream water management.