WSP12942

• File Number: 8040.800
• Description: Water Resources for Colorado
• State: CO
• Date: 5/1/2003
• Author: US Dept of Agriculture - Natural Resoruces Conservation Service
• Title: Colorado Basin Outlook Report May 1, 2003
• Water Supply Pro - Doc Type: Data

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SAN MIGUEL, DOLORES, ANIMAS, AND SAN JUAN RIVER BASINS
Streamflow Forecasts - May 1, 2003

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Lilylands Reservoir Inlet

Wetter _c===>> I
I
====....-.:--...==== Chance Of Exceeding * ._=a__===._.===_=====_ I
90% 70% 50% (Most Probable) 30% 10% I 30-Yr Avg.
I (1000AF) (1000AF) I (1000AF) (% AVG.) I (1000AF) (1000AF) I (1000AF)
=m===_='==__=======_=====_=========_=====_=====~==============_.=__==1=================_=__=_,========.__=__=_===__c_==_=========__
Dolores River at Dolores AFR-JUL 107 138 I 160 60 I 180 215 265
McPhee Reservoir inflow APR-JUL 118 155 I 180 56 I 205 240 320
San Miguel River nr Placerville APR-JUL 45 64 I 77 58 I 90 109 132
Gurley Reservoir Inlet MAY-JUL 4,8 7,2 I 8.9 60 I 10,6 13.0 14.8
MAY I 6.00 68 I 8.83
JUNE I 2.50 54 I 4.67
JULY I 0.40 30 I 1.32
MAY-JUL 1.26 1.60 I 1.83 60 I 2.06 2.40 3.06
MAY I 1.15 70 I 1.64
JUNE I 0.56 54 I 1.04
JULY I 0.12 32 I 0,38
MAY-JUL 0.56 1.11 I 1.48 60 I 1.85 2.44 2.45
MAY I 0.92 70 I 1.32
JUNE I 0.47 54 I 0.87
JULY I 0.09 33 I 0.27
APR-JUL 17.0 25 30 57 I 35 43 53
APR-JUL 21 31 38 55 I 45 55 69
APR-JUL 122 166 200 49 237 297 405
APR-JUL 72 89 100 44 I 111 128 230
APR-JUL 89 98 105 51 I 112 121 205
APR-JUL 170 270 335 42 I 400 500 800
APR-JUL 146 200 240 55 I 280 335 440
APR-JUL 17.0 24 28 48 I 32 39 58
APR-JUL 7.7 9.8 11.3 45 I 12,8 14.9 25
APR-JUL 7.2 12.0 18.0 45 I 24 32 40
MAY 9.0 57 I 15.9
JUNE 4,5 33 I 13.7
JULY 1.20 26 4.60

<<----=- Drier __==a.

Future Conditions

Forecast Point

Forecast
Period

Cone Reservoir Inlet

Rio Blanco at Blanco Diversion
Navajo River at Oso Diversion
San Juan River nr Carracus
Piedra River nr Arboles
Vallecito Reservoir Inflow
Navajo Reservoir Inflow
Animas River at Durango
Lemon Reservoir Inflow
La "Plata River at Hesperus
Mancos River nr Mancos

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Reservoir

SAN MIGUEL, DOLORES, ANIMAS, AND SAN JUAN RIVER BASINS I SAN MIGUEL, DOLORES, ANIMAS, AND SAN JUAN RIVER BASINS
Reservoir Storage (1000 AF) - End of April I Watershed Snowpack Analysis - May 1, 2003
======*-=._==m__.=_==.==============__==.=_.~.=*=a._=====____====__=_____====__=_____=___=====__====__=_===_=====_==_______==_====
Usable I *** Usable Storage *** I Number This Year as % of
Capacity I This Last I Watershed of ==_____________==
I Year Year Avg I Data Sites Last Yr Average
._.__..c_=m.__=====_=__=====___=====_...=____=_=_.__..=--=-=====...=____1_=__..===__=======_=___======_==========_==_=___a_.==_:==
I
I
I
I
I
I

21. 7
10.0
40.0
381. 2
19,0
126.0

5.9
5.1
9.0
193.7
17.1
54,4

11.2
3.3
16.0
214,9
17,1
64,0

14.2
7,4
23,4
304.6
17.1
70.3

ANIMAS RIVER BASIN
DOLORES RIVER BASIN
SAN MIGUEL RIVER BASIN
SAN JUAN RIVER BASIN
TOTAL SAN MIGUEL, DOLORES
AN JUAN RIVER BASINS

9
6
5
3
22

954
1200
o
492
809

53
41
43
62
51

GROUNDHOG
JACKSON GULCH
LEMON
MCPHEE
NARRAGUINNEP
VALLECITO

_===__.c=======.==~==_=w==~==..=~.===.=.___.===~==_.==......==..._=..___....==__=..===_=..=_=._==_..._==_:==..=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.