WSP05984

• File Number: 8149.911
• Description: Miscellaneous Small Projects and Project Studies - SE Needs Assessment and PSOP
• State: CO
• Basin: Arkansas
• Water Division: 2
• Date: 4/19/2001
• Author: PSOP Implementation
• Title: Final PSOP Implementation Committee Report Addendum to Preferred Storage Options Plans Report
• Water Supply Pro - Doc Type: Report/Study

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1 0 1 '_-:Final PSOP Implementation Committee Report
Vsoutheastern Colorado Water Activity Enterprise
April 19, 2001

Background and Summary - Preferred
Storage Options Plan

Project Purpose and Need-The current population of the Southeastern Colorado Water
Conservancy District's nine-county service area is 620,000. That number is expected to
increase to over 1.5 million by the year 2040. In an effort to prepare for the water needs of
the growing population in the Arkansas River basin and to help sustain water supplies for
agricultural use, the PSOP establishes a strategy for the effective management of existing
storage and the development of additional water storage capacity,

The need for additional water storage capacity to meet the needs of agricultural and
municipal water users in the nine-eounty service area of the Southeastern District was first
documented in the December 1998 Water and Storage Needs Assessment Report, That
report, using population growth projections and an agricultural use baseline to establish a
year 2040 demand, indicates that municipal water providers need 107,100 acre-feet of
additional storage to meet their water needs into the year 2040 and agricultural water users
need 66,000 aere-feet of firm storage to help sustain the Winter Water Storage Program
supplies and provide for the storage of replacement water for well augmentation, The total
storage demand was determined to be 173,100 aere-feel.

The Preferred Storage Options Plan (PSOP) Report, initiated in the spring of 1999, then
analyzed the various alternatives to address the documented need for storage, The 173,100
aere-foot storage demand was then modified in the Preferred Storage Options Plan to
122,100 acre-feel. This change resulted from a reduction in the storage for agrieultural needs,
which was determined to be an appropriate step because there would not be the financial
means among the agricultural water users to develop the full 66,000 aere-footadditional
storage capaeity.

District Water Management Storage--As an alternative to firm storage capacity developed
for the Winter Water Storage Program and replaeement water supplies, the PSOP would
develop "District Water Management Storage" (DWMS) as a part of the proposed
enlargement project at Pueblo Reservoir (and/or Turquoise Reservoir), The DWMS would be
used to store a portion of Winter Water that is subject to spill at Pueblo Reservoir and
provide for additional temporary storage for agricultural and municipal water providers, and
to help facilitate a water banking program in the Arkansas Valley. (The Implementation
Committee Report refers to the District Water Management Storage as "Enterprise Water
Management Storage" (EWMS) in reeognition that the Distriet's Water Activity Enterprise
will manage the storage space,)

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