PUB00114

• Year: 1997
• Title: Arkansas Groundwater Users Association - 1997 Plan Year Arkansas River Replacement Plan
• CWCB Section: Stream & Lake Protection
• Author: Rocky Mountain Consultants, Inc.
• Description: Application for plan to divert tributary groundwater in the Arkansas River Basin, Colorado
• Publications - Doc Type: Historical

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5.4 Depletions to Usable Stateline Flows and Pre-Compact Pumping Allowances

Since stream depletions which may affect senior Colorado water rights will be replaced at
100 percent, there will be no net depletion to Usable Stateline Flows. Pre-Compact pumping
allowances are shown for each well in the plan in Appendix B, Pre-Compact pumping allowances
for AGUA wells total 3,476 acre-feet without the Booth Well Association wells, and 3,641 acre-feet
when the Booth Well Association wells are included.

6. Augmentation Sources

AGUA can provide augmentation water in 1997 from three sources, 1) consumptive use

credits from shares of the Excelsior Ditch, 2) transmountain water purchased from the Board of

Water Works of Pueblo, Colorado (Pueblo), and 3) transmountain first use water or return flow

credits purchased from the Southeastern Colorado Water Conservancy District (District).

6.1 Excelsior Ditch Credits

The Excelsior Ditch is a relatively junior water right which diverts from the Arkansas River
below Pueblo with priorities of May 1, 1887 for 20 cfs, and January 6, 1890 for 40 cfs. Diversion
records are available from two sources; 1) the records of the Division of Water Resources for the
years 1940-1985, as compiled in the Arkansas River Basin Study, and 2) records of the Colorado
Water Conservation Board for the years 1908-1938. At this time we do not have any record of
diversions which may have occurred in 1939, therefore, 1939 is excluded from the analysis.
Division of Water Resources Excelsior Ditch diversion records were adjusted by Mr. Ralph Adkins,
P.E. to account for other water carried in the ditch during 1941-1949, and 1974-1981.

Diversion records show that the Excelsior Ditch diverted an average of 4,070 acre-feet per
year during the period 1908-1985. During the pre-Compact period of 1908-1947 the Excelsior Ditch
diversions averaged 5,020 acre-feet per year. During 1948-1985 the diversions have averaged 3,095
acre-feet. Table 9 shows the tabulated historic diversions by the Excelsior Ditch. In 1948, the year

G.\J 177_ OOJ\REPORTSIAGUA97 _I RPT

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Printed February 27, 1997