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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SITE CONDITIONS AND HYDROLOGY

A.

LOCATION OF THE PROJECT

The Webster Hill Reservoir site is located on the Colorado River
between the towns of Rifle and Parachute in Garfield County,
Colorado. The dam and powerhouse would be situated approximately 6
mi west (downstream) of the town of Rifle in Sections 27 and 34 of
T6S, R94W. A map of the general project area is shown on Figure S-I.

With the normal pool at an elevation of 5,250 ft, the reservoir would
impound approximately 23,730 ac-ft of water with a surface area of
about 915 acres, as shown on Figure I-I.

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B. TOPOGRAPHY
Topographic maps of the reservoir site and surrounding area are shown
on the Rulison, North Mamm, Anvil Points, and Rifle 7J,-minute U.S.
Geological Survey (USGS) quadrangle sheets at contour intervals of
40 ft. The U.S. Bureau of Reclamation (USBR) and the Colorado Water
Conservation Board have done topographic mapping at the project site
at contour intervals of 5 ft and 2 ft, respectively. The Colorado
Water Conservation Board 2-ft contour map of the dam site is shown on
Figure S-2.

The drainage basin of the Colorado River above Webster Hill varies in
elevation from 14,000 ft at the headwater peaks to approximately
5,195 ft along the river at the project site. The basin is
characterized by narrow valleys and mesas in the project vicinity,
gradually changing to steep walled canyons and high peaks in the
upper main stem and tributary areas.

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The river flows in a westerly direction from Rifle, turning south-
westerly through the region of the proposed reservoir. Just
downstream of the dam site, the river turns sharply to the northwest
and then turns again to resume a generally westward course. The
Colorado River Valley in the region of the proposed reservoir slopes

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