WSP11022

• File Number: 8149.911
• Description: Miscellaneous Small Projects and Project Studies - SE Needs Assessment and PSOP
• State: CO
• Basin: Arkansas
• Water Division: 2
• Date: 12/10/1998
• Author: GEI Consultants Inc
• Title: SECWCD Arkansas Basin Future Water and Storage Needs Assessment
• Water Supply Pro - Doc Type: Report/Study

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Water and Storage Needs Assessment
SECWCDI Assessment Enterprise
December 10,1998

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The storage need identified above is for the high growth forecast, and could be less
under the base forecast.

Additional storage capacity could benefit non-District entities who have water
interests in the Arkansas Basin, as well as District entities who desire more storage
to enhance water management and provide drought protection. Additional East
Slope storage also may enable additional Fry-Ark Project imports to be made.
Currently, Fry-Ark imports can be curtailed due to unavailable East Slope storage
capacity. These "foregone" diversions from the West Slope have totaled
approximately 200,000 af since the project began operation. /

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The 31 storage/water management options were subjected to a qualitative
evaluation in order to develop a list of 14 options for more-detailed review. These
14 options then were evaluated using a decision analysis framework to identify 8
options that appear to have better overall performance in terms of cost, operational
effectiveness, and environmental/social factors. The evaluation process is
preliminary in nature and is not intended to be fully compliant with NEPA
guidelines. However, the basic structure of the process is designed to be expanded
and refined in subsequent more detailed levels of study and evaluation of
alternatives. The eight alternatives are summarized in the following table in the
order of their priority ranking in the alternatives analysis:

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Lake Mere<li\t>. Ellla'gemell\ eo ,000
Fry-Ark Project Reoperation 90,000(2)
Turquoise Lake Enlargement 9,000
Clear Creek Reservoir (New) 1 00,000
Tennessee Creek Reservoir 28,000
Pueblo Reservoir Enlargement 75,000
Williams Creek Reservoir 16,000
Gravel Lakes Storage 13,000

(I)
Estimated maximum volume of storage based on initial configurations.
(2) Estimated potential \'olume available without consideration of Ea!>t Slope decrees.
Volume may not be available: in all years.

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~ GEl Consultants, Inc.

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