WSP10444

• File Number: 8441.400
• Description: Colorado Big Thompson Project - Reports
• State: CO
• Basin: South Platte
• Water Division: 1
• Date: 8/1/1986
• Author: Colo. Water Resource
• Title: Summary Report - Preliminary Hydrologic Analysis
• Water Supply Pro - Doc Type: Report/Study

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4.0 WATER~ESOtJRCESUT:tLIZATION,

4.1 GENt!:RAL

Water availaJ:>ility for the various reservoirs analyzed as potential
Joint~u$e reservoirs or coltlponents of the Green Mountain Exchange
Project was evaluated, underthr,ee levels of water utilization in
the basin: t'heexil3ting leve.! of use' and two future lev.els of use
undeir incree.:seddeveloP)l\ent in the basin.

In all three operating scenarios, the major proje,cts to be operated
an.d the,iraverage annual targ.et demands were. specified by the
Authority in consultation with the DWB and the CRWCD. Demands used
in. the operating simulations .for all three development scenarios
were furnished by the DWE for their Fraser River, Williams Fork and
Blue River diversion systems for operation both with and without
the Green Mountain exchange. These demands assumed construction of
Two Forks Reservoir with a storage capacity of 1.1 million af.
Demands for the proposed Rock Creek Reservoir, Indian Creek
Reservoir, reformulated West Divide Project and Red Cliff Project
were furnished.by the c~WCD.

I 4.2 EXISTING LEVEL USE

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The Existing Level Use Scenario consist$ of operation of 'the
Colorado River basin under its 1983 level of development with
several' exceptions. The' exceptions, which consisted of expanded
demands.irt all oases, fall into two general categories of use: 1)
increased diversions by existing transmountain diversion' systems
which are not presently operating at their fUll capacity; and 2)
diversions by ,project features or proposed facilities which are not
yet constructed. These diversions are:

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