DWR_4151770

• Title: JANUARY 1993 SWSI: COLORADO WATER SUPPLY CONDITIONS UPDATE, SURFACE WATER SUPPLY INDEX
• Year: 1993
• Document Type - Publications and Reports: SWSI Monthly Report

SOUTH PLATTE BASIN
Basinwide Conditions Assessment:
SOUTH PLATTE RIVER BASIN
The SWSI value of 0.0 indicates that for December the Srfac.ester Supply Index""`�Y
s
basin water supplies were normal. Reservoir storage, the key
component in this basin in computing the SWSI value, was •
112%of normal on December 31. Storage in the major plains ;,�=, _
o 2 � ' - 1
reservoirs,Julesburg,North Sterling,and Prewirt,increased byL
--�
12,098 acre-feet during December and are at 65%of capacity.J ,liMr
Storage in the major upper basin reservoirs,Cheesman,Eleven D ' '! ti
g _
Mile, Spinney, and Antero, decreased by 2,601 acre-feet and till if
are at 85%of capacity. The Soil Conservation Service reports _
-s
December 31 snowpack at 87% of normal. The National
Weather Service reports,December precipitation as 89% of "3
normal. Flow at the gaging station, South Platte River near -4
4.1484 JAN85 JANOS JAN97 JAN88 JAN99 JAN90 JAN91 JAN92 JANS3
Kersey, averaged 819 cfs for the month as compared to the MONTH/YEAR
1961-1991 December average of 811 cfs. Flow at the
Colorado/Nebraska stateline averaged 834 cfs for the month.
Administrative/Management Concerns
The earliest call in effect on the South Platte during SOUTH PLATTE RIVER NR. KERSEY
December was the Cheesman storage call of 6-27-1889 placed 450 FLOW B"WATER YEAR
on November 24. 400
350
300
e
F 250
F Zoo
100
SD
0
Oct. Nev Oec Jan Feb March
MCHTH
p WET YEAR C11113) 0 SIT(1164) • AVG X 1693
Representative Reservoirs
South Platte River Basin
240
220
200
•
100 ��\\
180-./////`�\/
140
t 100 / \
3 SO
40-/A.,
DIIIoo /brretooth Eleven Mile Cheeaman Jackson Barr Lake
® Avg 12/31 Content. ® 17/91/52 Content.
3