PROJ00495

• Contract/PO #: C153678
• Contractor Name: Lower Arkansas Water Management Association
• Contract Type: Loan
• Water District: 67
• County: Prowers
• Bill Number: SB 96-124
• Loan Projects - Doc Type: Feasibility Study

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stringent well administration and regulation. The main stem irrigation pumping during water
years 1990-94 averaged 78,555 acre-feet annually. Averages of 58,197 and 20,358 acre-
feet annually were supplemental and sole-source pumping respectively.

Table 3 shows the distribution of this 1990-94 main stem irrigation pumping by river
segment and type of use. Most of the pumping occurred in the lower part of the basin. An
average of only 7,118 acre-feet annually (9.06 percent of the total) affected the Arkansas
River above the diversion facilities for the Amity Canal. An additional 3,928 acre-feet annually
(4.49 percent of the total) affected the Wiley, Pleasant Valley, and May Valley drains above
the Amity Canal. None of this was sole-source pumping. An average of 36,457 acre-feet
annually (almost half of the total pumping and about 75 percent of the sole-source pumping)
affected the river below the diversion facilities for the Buffalo Canal.

Municioal and Commercial PumDino

Table 4 shows the estimates for the pumping by LAWMA's municipal and commercial
members during 1994. Data are not yet available to derive estimates for two municipal and
two commercial members. These four members use only small amounts of water so the lack
of data for them will not affect the results of this study appreciably. In addition, the two
municipal members are located relatively low in the basin, below the Buffalo Canal headgate,
and their usage antedates the Arkansas River Compact. Other than these, this pumping
amounted to 13,883 acre-feet, of which 12,802 acre-feet occurred in the main stem area,
and 1,081 acre-feet occurred outside of the main stem area. The municipal pumping was
11,982 acre-feet in the main stem area and 522 acre-feet outside of the main stem area. The
commercial pumping was 820 acre-feet in the main stem area and 559 acre-feet outside of
the main stem area. This study assumes that the 1994 pumping by municipal and commercial
users is representative of the long-term condition.

and is divided among the program participants according to agreed-upon percentages. This water is
then regulated in the various storage reservoirs and is available to the various participants during the
irrigation season. Allowances are made in the program implementation for the contributions to
conservation storage in John Martin Reservoir. The winter storage program was decreed in Case No.
84CW179.

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