WSP07965

• File Number: 8446
• Description: Cache La Poudre Project
• State: CO
• Basin: South Platte
• Water Division: 1
• Date: 7/1/1983
• Title: Cache La Poudre Project Study and Related Correspondence
• Water Supply Pro - Doc Type: Report/Study

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4.

Potential projects could include storage reservoirs in
portion of the basin for the purpose of regulating
hydroelectric peaking power production as well as for
conservation storage.

the upper
flows for
additional

5. A numuer of potential reservoir sites would be considered indi-
vidually and in var ious combinations as alternative projects which
would exhibit a wide range of possible development.

Potential reservoir sites were identified from previous planning studies,
by analysis of topographic maps and by site visits. Seven major reservoir
sites appeared to be the most promising locations for storage in the upper
basin, they are:

Grey Mountain Reservoir on the mainstem (conservation storage) .

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New Seaman Reservoir on the North Fork (conservation storage) .

Elkhorn Reservoir on the mainstem (conservation storage or peaking power
production).

Indian Meadows Reservoir on the mainstem (peaking power production).

Idylwilde Reservoir on the mainstem (peaking power production) .

Rockwell Reservoir on the South Fork (peaking power production).

Upper Poudre Reservoir on the mainstem (peaking power production) .

The seven potential reservoir sites represent possible storage locations
that could be linked together to form potential projects to serve the
functions of conservation storage and hydroelectric power generation. The
development concepts listed above were applied to the potential reservoir
sites to formulate a broad range of alternatives.

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The formulation process was initiated with the development of a "universe"
of conceptual projects ranging from a single reservoir for conservation
storage purposes to large, multiple reservoir systems with connecting tunnels,
conduits, diversion dams and power plants to produce peaking hydropower as
well as provide conservation storage.

Very preliminary analyses indicated that the entire "universe" of con-
ceptual projects could be represented by six basic configurations which would
illustrate the full range of possibilities for the development of the power
potential in the upper basin as well as a spectrum of change in the present
use of the streams in the upper basin. The six basic configurations initially
selected for evaluation as preliminary alternatives in Phase I of the study
were:

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