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<br />Water and Storage Needs Assessment
<br />SECWCD/Assessment Enterprise
<br />Dece~ber 10, 1998
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<br />The other FV A entities have estimated deficits totaling approximately 7,300 afby the year Z040
<br />under the high forecast and the base forecast. These entities will need additional sources of
<br />,sl.lpply: The FV A entities have indicated their desire to participate ona regional basis with
<br />, Colorado Springs in a second Fountam Valley Aqueduct and in having storage dedicated in the
<br />Project to meet their needs.' Assuming that these entities would acq-u,ire surface water rights in
<br />the District and use Project storage to regulate their supplies, storage of approximately 22,000 af '
<br />may be needed under the high forecast Deficits and potential need for storage under the base
<br />forecast are similar to the high forecast (This is bas.ed on a storage/yield ratio of 3 to 1, typical
<br />for relatively senior agricultural rights converted and stored for M&I use. Similarly, year 2040
<br />deficits under the high forecast for the entities West of Pueblo total approximately 2,100 at:
<br />Storage of 5,000 to 6,000 af is likely to be needed to meet these future demands under the high
<br />forecast. For the entities west of Pueblo, the base forecast deficits are similar in magnitude to
<br />the high forecast.
<br />
<br />Participants in the Winter Water Storage Program have identified a need for 40,000 af of
<br />dedicated space.in the,Projectto reduce the incidence of spills of Winter Water. As described
<br />in Section 7 and based on the nureau's modeling of thy 1966-85 period, 40,000 af of space for
<br />Winter Water would reduce potential spills by over 113,000 af during a 20-year period. (This
<br />is based on mwricipal demand of21,000 af/yr and municipal storage of 81,500 af.) At higher
<br />municipal deinand and storage level~ (28,000 to 41,000 af/yr and 159,000 af), the 40,000 af of.
<br />dedicated storage for Winter Water will maintain total winter spills in the range of 90,000 to
<br />120,000 af over the 20-year Bureau model period. (Spills would occur on average in 6 to 8 of
<br />the 20 years.) Therefore, the need for dedicated storage for Winter Water is evident.
<br />
<br />Estimated storage needs are summarized below:
<br />
<br />....-.:------.~~~ ~-~--~_r~____ ____ ~~ ___ __,~ ____ _ _ __ _~ _ - -'--,
<br />~_~_, _ _ ___..,_ },!t\~'::. ____._ .._. ~ ,_. ,~'- _~~~":'\ f: ~,~, . ~~",Y~l: ,'::\.' .,~
<br /> High Base
<br /> Forecast Forecast
<br />Studied Needs
<br />Colorado,Springs Utilities 45,000 21,QOO
<br />Other FV A entitles 22,000 22,000
<br />Entities West of Pueblo 3,700 5,000
<br />Florence 2,300 0
<br />Winter Water Program 40,000 40;000
<br />Storage to. Regulate Replacement
<br />Water for Well Pumping 26,000 , 26,000
<br />Subtotal 139,000 114,000
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<br />I GEl Consultants, Inc.
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<br />6-22
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<br />r741l\FiIlIUITI!XT-A. WPD
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