PROJ00406

• Contract/PO #: FS0004X
• Contractor Name: Green Mountain Exchange Project CWRDA
• Contract Type: Loan
• Water District: 0
• County: Grand
• Loan Projects - Doc Type: Feasibility Study

I'
I
I
I

I

I

1

1
,I'
I,
,I
I
I
I
I

I
I
I
I

This Final Report compares costs and yields of reservoirs, combinations of reservoirs and
the conveyance system in a manner so that several of the elements can be combined to
formulate alternative water exchange projects.

1.3 REPORT ORGANIZATION
The final report is organized to presen~ the three phases of the Study in the order in
which they were concluded. This order has been:

o
o
o

Initial Screening or pre-reconnaissance investigation
Hydrologic, water rights and operational analysis
Reconnaissance-level project designs and cost estimates and comparative
analysis and cost-yield relationships of alternative reservoirs and potential
reservoir combinations.

Recognizing that this study has covered only a limited number of the facets involved in
selection of projects for construction, no ranking or preference has been attempted. Instead,
efforts have been concentrated on developing reservoir water yields and project construction
cost estimates based on an approximately uniform level of investigation.

An initial screening of previously published information about environmental concerns
was conducted for each site with the objective of eliminating sites with "fatal flaws". No attempt
has been made to suggest mitigation measures or evaluate the costs of complying with
requirements that result from environmental concerns.

Reservoir sizes have been selected to represent the maximum size that conforms with
the site topography, with some restrictions to limit the extent of reservoir-imposed relocations of
existing improvements. Generally, maximum yields from individual reservoirs fall short of
meeting Green Mountain Exchange Project objectives. Consequently, emphasis has been
placed on portraying combinations of reservoirs and estimating firm yield from the sites rather
than analyzing unit cost of yield for alternative dam heights at individual sites. Comparisons have
been carried out for the cost of yield from alternative reservoirs and alternative combinations of
reservoirs and for the cost of alternative conveyance system capacities.

1-5