PROJ00553

• Contract/PO #: FS0022X
• Contractor Name: West Anvil Water & Power Company
• Contract Type: Loan
• Water District: 0
• County: Garfield
• Loan Projects - Doc Type: Feasibility Study

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WEBSTER HIll RESERVOIR AND HYDROPOWER PROJECT

EXECUTIVE SUMMARY

GENERAL
Gibbs & Hill, Inc. has completed this feasibility study for the West
Anvil Water and Power Company. West Anvil proposes to construct and
operate a 23 MW (installed capacity) hydroelectric power plant using
the impoundment of a new reservoir that also provides storage for
water to supplement supplies during dry years. The study shows that
the project is technically, economically, and environmentally sound.
For the ownership and financing arrangement studied, the electric
power and water supply produced by the project will provide a flow of
revenue sufficient to meet operating costs, retire debt, and yield an
attractive return on investment.

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The project site is on the Colorado River between the towns of Rifle
and Parachute in Garfield County, Colorado (see Figure S-l). A
concrete-gravity dam will be located where the Co lorado River bends
sharply around an eros ion-res i stant ridge of sandstone (see Figure
5-2). The dam will be constructed of roller-compacted concrete, with
a crest length of 1,300 ft and a height of 88 ft. The dam will
impound 23,730 ac-ft of water in a reservoir with a surface area of
915 acres. The powerhouse, with two fixed-propeller hydraulic
turbines, and one Kaplan turbine, will have a maximum power capacity
(at 115% of design flow) of 26.4 MW and will produce a yearly average
of 108 million kWh of electric energy.

Embankments will be constructed to elevate the existing highway,
freeway, and railroad above the high-water level; the river channel
wi 11 be excavated downstream from the powerhouse to increase the
effect ive power head. Land wi 11 be purchased as necessary from the
several owners indicated in Figure 5-3.

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