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<br />Water and Storage Needs Assessment
<br />SECWCD/Assessment Enterprise
<br />December to, 1998
<br />
<br />represent the bulk of this potential water supply need. The supply/demand
<br />comparisons have assumed that the Fry-Ark Project yield is 80,400 af per year.
<br />Historical yield has been closer to 60,000 af per year. As municipal demand
<br />increases, municipal entities will begin using greater amounts of Fry-Ark Project
<br />water. Under the forecast, municipal entities will begin to use their Fry-Ark
<br />supplies more heavily, approaching their 51 percent allocation by the year 2020.
<br />This will impact current uses of Project water by agricultural users for
<br />supplemental irrigation and replacement supplies for well depletions.
<br />
<br />, ..-~.+ ' ..: :;;,:>:1~:.; ;~1- 4~~..,~.~~.~-)t~~;)f~.r~~a~\ ~eficit J~;~j~t) ~I.gti f~';!c.a~t. '>:" ", -
<br />< ',' Currenr.: < 'w c' 201:0 . .:. 2020 ; ,...'. 2030 'i'
<br />.' Region -'.' . Year.. .,. > ",~, ~ ". .. ,,\,.'!t[., """._. .~..'. ~,,-~. ~'-, -~.' . I' 2040,
<br />Entities West of Pueblo 0 0 0 400 2,100
<br />Pueblo West 0 0 0 0 , 0
<br />Pueblo 0 0 0 0 0
<br />Fountain Valley 0 500 24,800 50,400 79,700
<br />Entities East of Pueblo 0 0 0 0 0
<br /> Total (High): 0 500 24.800 50,800 81,800
<br />
<br />A water supply/demand comparison was performed for each municipal entity as
<br />described in Section 6 of the main report. The above tabulation summarizes results for
<br />the high demand forecast.
<br />
<br />5. Most of the municipal water supply entities have water rights to meet their 2040
<br />needs. However, storage capacity is needed to provide firm yield and to facilitate
<br />water exchanges and management of imported water reuse.
<br />
<br />6. Average annual agricultural water use in the District is estimated to be 825,000 af
<br />(for ditches and canals between Pueblo and John Martin reservoirs). Agriculture
<br />relies heavily on supplemental sources including transrnountain water, Fry-Ark
<br />water, Winter Water, storage reservoirs, and ground water, as indicated on Figure
<br />ES-4. (Direct flow water accounts of86 percent of agricultural use in a "wet" year,
<br />but only 65 percent in a "dry" year). As municipal demands increase, the amount
<br />of Project water now available to agricultural entities will decline, as indicated in
<br />Figure ES-5. Also, agricultural well users will need sources of replacement water
<br />to offset well pumping effects on the Arkansas River. A third supply source that
<br />may not be available to agricultural interests during the planning horizon is
<br />transrnountain water currently being purchased by the irrigation companies from
<br />municipal entities. As municipal water use increases, this water, estimated to be
<br />
<br />97411\FinaU\TEXT+A.WPD
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<br />m GEl Consultants, Inc.
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