WSP13019 ‎(2)‎

• File Number: 8040.800
• Description: Colorado Water Resources
• State: CO
• Basin: Statewide
• Date: 7/1/1999
• Author: Division of Water Resources
• Title: Colorado Water Supply Conditions Update Reports
• Water Supply Pro - Doc Type: Data

SOUTH PLATTE BASIN

Basinwide Conditions Assessment
The SWSI value of 3.5 indicates that for June the
basin water supplies were above normal. Reservoir storage,
the major component in this basin in computing the SWSI
value, was 109% of normal as of the end of June.
Cumulative storage in the major plains reservoirs: Julesburg,
North Sterling, and Prewitt, is at 99% of capacity.
Cumulative storage in the major upper-basin reservoirs:
Cheesman, Eleven Mile, Spinney, and Antero, is at 100% of
capacity. Flow at the gaging station South Platte River at
Kersey was 5,713 cfs, as compared to the long-term
average of 2,853 cfs.
The wet conditions of May and resultant snowpack
runoff continued to keep the flow of the mainstem of the
South Platte and its tributaries far above average in June,
the month that historically has the highest flows. Flows
began to drop toward the end of June as snowmelt curtailed
and the demand increased for irrigation diversions.

Outlook
Though flows have dropped off dramatically, no
widespread water shortages are expected this summer
because of the excellent reservoir storage conditions and
stream bank storage return flows.

Administrative/Manaaement Concerns
A mainstem call is expected in the first week or two
of July. A call occurs almost every year by the first of July.
In dry years there would also be a call for most all of June.

Public Use Imoacts
As of the end of June, all the mainstem reservoirs
were either full or very near full.

Jul-99

OCUTHRATTEIlASINSWll HSltH\'

5 -----. .---__ _..___ __ _____ ~__'__

>- -1
a:
o

I-
W
;: 2

w
:3 1
~
X
:go
~

-2

.;!

...
J;n.9JJiin.91Jan.Q2.w..mJa'l.94~Jm.9SJ4nIll"""JM.99
M)\IIH/ 'l'EAA

SJJ1H RAl1E RI.ffi /IR ~ RONB\" 'MIER 'IfiIR

30lJ,CXD

j
.--
V
/
V
~ V ...i.
/" ~ r- j
-
,

:lZ5Jl.CXD
u.
e
.:t ZOlJ,CXD
~
o
..J
~ ~5D,CXD
>
i=
~ ~OlJ,CXD
::.
::>
u

5D,CXD

o
ill ~ ~ m ~ ~ ~ ~ m ~ ~ ~

.....w:r(~

-+- r:Rf(1$l) -- A.G -ll-1!Hl

~A11'vE~RS

xo.a:o

2ila:o

Qj
~4DJ.CXJ)
~
..
.;
~1!Ila:o
o
ijj
..
~1Clla:o
::>

Sla:o

0Ia1

Hnela:t1 Be.elMle 0mrnIl

.B:l<sn

8Ir~

lAg 63lClJ1B1s

F.l&3l9lClJ1B1s

3