SWSIReportMarch2008

• Title: Colorado Water Supply Conditions Update
• Date: 3/17/2008
• Description: Joint Water Availability & Flood Task Force Meeting Presentation
• Basin: Statewide
• Drought Mitigation - Doc Type: Presentation

ARKANSAS BASIN

Basinwide Conditions Assessment
The SWSI value for the month was 3.3. The Natural
Resources Conservation Service reports that March 1
snowpack is 1520/0 of normal. Flow at the gaging station
Arkansas River near Portland was 550 cfs, as compared to
the long-term average of 361 cfs. Storage in Turquoise,
Twin Lakes, Pueblo, and John Martin reservoirs totaled
101 % of normal as of the end of February.
Reservoir storage in the Pueblo Winter Water
Program totaled 137,153 acre-feet as of the end of
February. This storage amount is slightly higher than last
year's storage to date and represents 1440/0 of the past five-
year average. Conservation storage in John Martin
Reservoir has accumulated 20,820 acre-feet versus 30,605
acre-feet as of the end of February last year, but still ahead
of the 1950-1975 (Pre-Winter Water) average of 17,810
acre-feet.

Administrative/Manaqement Concerns
Pueblo Reservoir storage of 242,632 acre-feet at the
end of February was nearing the top of conservation storage
(256,949 acre-feet), but storage was expected to hold just
under the flood pool by the end of the Winter Water Program
on March 14, 2008.

Mar-08

ARKANSAS BASIN SNSI HISTCRY

I-
W
S

W
::J
....J
<C
> 0
><
w
o
z
- -1
>-
0::
o
-2

-3

-4
Jan-99 Jan-DO Jan-D1 Jal1-02 Jal1-03 Jal1-04 Jal1-05 Jan-OO Jan-D7 Jan-D8

rvDNTH / YEAR

ARKANSAS RIVER NR PORTLAND, FLOW BY WATER YEAR

180,000

160,000

Q3
Q)
~ 140,000
U
~ 120,000
S
~ 100,000
w
~ 80,000
<(
5 60,000
~
:J
o 40,000

20,000

o
O:i

Nov

Dee

Jan

Feb

rvlarch

-----8-- WET (1984)

~ DRY (2002)

---fr-- A VG

-* 2008

REPRESENTATIVE RESERVOI RS

250,000

200,000

Q3
~
cb
~ 150,000
ai
0)
co
o
~ 100,000
:0
~
:J

50,000

John rvlartin

Pueblo

Turquoise

Twin Lakes

III Avg. 2128 Contents

mI 2129/08 Contents

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