WSP12944

• File Number: 8040.800
• Description: Water Resources for Colorado
• State: CO
• Date: 3/1/2003
• Author: US Dept of Agriculture - Natural Resoruces Conservation Service
• Title: Colorado Basin Outlook Report March 1, 2003
• Water Supply Pro - Doc Type: Data

YAMPA, WHITE, AND NORTH PLATTE RIVER BASINS
Streamflow Forecasts - March 1, 2003

======:='=='='===='======='==========C'================='=-='=====-============8======-===============S:=_==='========-==================-========

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I <<====== Drier =::c=== Future Conditions Wetter =e===>>
I
Forecast Point Forecast I ==================== Chance Of Exceeding * ======================
Period I 90% 70% 1 50% (Most Probable) I
I (1000AF) (1000AF) 1 (1000AF) (% AVG.) I
====================================================================1=======================
North Platte River nr Northgate APR-SEP 44 113 1 160 59
1
Laramie River nr Woods APR-SEP 35 56 I 70 52
I
Yampa R abv Stagecoach Res APR-JUL 14.4 21 I 25 86
I
Yampa River at Steamboat Springs APR-JUL 161 210 I 245 88
I

Elk River nr Milner APR-JUL 159 211 250 77
Elkhead Creek nr Elkhead APR-JUL 12.6 19.0 25 64
ELKH'EAD CREEK blw Maynard Gulch APR-JUL 13 .3 30 42 71
Fortification Ck nr Fortification MAR -JUN 1.50 3.30 5,20 69
Yampa River nr Maybell APR-JUL 470 660 790 80
Little Snake River nr Slater APR-JUL 72 98 118 74
LITTLE SNAKE R nr Dixon APR-JUL 133 200 245 74
LITTLE SNAKE R nr Lily APR-JUL 149 220 265 73
White River nr Meeker APR-JUL 129 163 190 66

30% 10% 30-Yr Avg.
(1000A1') (1000AF) (1000AF)
=====================================
205 275 270
97 136 135
29 36 29
280 330 280
293 361 325
33 50 39
54 71 59
7.10 9.00 7.50
920 1110 990
140 175 159
~90 355 330
310 380 365
222 279 290

YAMPA, WHITE, AND NORTH PLATTE RIVER BASINS
Reservoir Storage (1000 AF) - End of February

==-========z===================================================================================================================~_=c

Reservoir

Usable 1
Capacity 1
1

1
1
======================================================================================================================m===========
*** 1
1
Avg 1

YAMPA, WHITE, AND NORTH PLATTE RIVER BASINS
Watershed Snowpack Analysis - March 1, 2003

*** Usable Storage
This Last
Year Year

Watershed

=========================-======================-======cc================ =====================z===================================

Number
of
Data Sites

This Year as % of

Last Yr

Average

STAGECoACH 33.3 24.4 27.0 24.0 LARAMIE RIVER BASIN 3 123 66
YAMCOLO 9.1 3.8 4.6 6.5 NORTH PLATTE RIVER BASIN 9 138 87
TOTAL NORTH PLATTE BASIN 11 135 84
ELK RIVER BASIN 2 130 86
YAMPA RIVER BASIN 11 144 93
WHITE RIVER BASIN 4 157 84
TOTAL YAMPA AND WHITE RIV 14 139 90
LITTLE SNAKE RIVER BASIN 8 128 88

== === ='== = = = =::: == = == ='==='== = = == = = = ==:::: == = = = == = == = = == c'::: == = == = = == = = = = = == = = == = = = = = = = = = = == = == ==== == == == = = == == = == = = = = = == = == = = = = == == == = == === = == = === = == -= = =

The average is computed for the 1971-2000 base period.

* 90%, 70%, 30%, and 10% chances of exceeding are the probabilities that the actual volume will exceed the volumes in the table.

(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.