DWR_4151779

• Title: MAY 1992 SWSI: COLORADO WATER SUPPLY CONDITIONS UPDATE, SURFACE WATER SUPPLY INDEX
• Year: 1992
• Document Type - Publications and Reports: SWSI Monthly Report

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SOUTH PLATTE BASIN
Basinwide Conditions Assessment:
The SWSI value of +0.9 indicates that for April the SOUTH PLATTE RIVER BASIN
basin water supplies were slightly above normal. The W."'later Supply ' History
National Weather Service reports April precipitation at 33%of ,_ ,
average. The Soil Conservation Service reports snowpack on W 3_ . ' :4 ,
-
May 1 at 64% of average. Reservoir storage, the key - w _
component in this basin in computing the SWSI value, was • -- L`
106% of average on May 1. Storaage in the major plains j 1 l"' •.
reservoirs,Julesburg,North Sterling,and Prewitt,increased by i - —All
A y
3400 acre-feet during April and is at 97%of capacity. Storage Fri
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in the major upper basin reservoirs, Cheesman, Eleven Mile, z-
Spinney, and Anterok, increased by 5057 acre-feet and is at
86% of capacity. Flow at the gaging station, South Platte -3-
River near Kersey, averged 1038 cfs for the month as .._..-.-- ... ---.-�
JANB3 JAN94 .AIMS JANOS JAN97 JANOS JANB9 JAN90 JAN91 JAN92
compared to the 1961-1991 April average of 998 cfs. Flow at IONTW yEAR
the Colorado/Nebraska stateline averaged 712 cfs for the
month.
Administrative/Management Concerns
The season so far has been hot and dry. The earliest SOUTH PLATTE RIVER NR. KERSEY
senior call in effect for April was the Burlington (11-20-1885) 740 FLOW ev WATER YEAR
placed in District 2.
Yf
Y SOO -
L
ion
400 -
u 3r
i g Sa
o _.
I no
1O0
0
Oct Nov D. Jen Feb March AprI1
MONTH
0 'MET(1903) + oar(1964) O AVG. A 1992
REPRESENTATIVE RESERVOIRS
SOUTH PLATTE RIVER BASIN
220
200 j/.\.
Z 160 A
j-•f 140'� �-1
n 120 ^_\
100 // \\` ' <
... 9O ��////////// \\\�\\\\\\ /���\ ! \
40 0� �\ /\
^/\ „A
. /\ ,,, \, /\ /\ /,-\ /\
Dillon Fbrptooth Eleven Mlle Cheernen Jecason Barr LAke
® Avg 4/30 Content9 ® 4/30/92 Cont9nL9
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