7748

• UCREFRP Catalog Number: 7748
• Author: Western Water Consultants, I.
• Title: Final Report on Little Snake River Depletions by Pot Hook, Three Fork and Powder Wash Rights.
• USFW Year: 1990.
• USFW - Doc Type: Laramie, WY.
• Copyright Material: NO

compared to those under the Water Development Baseline, defined on Page 18 hereof,
as needed to determine project impacts.
The purpose of this report is to present information on the WIRSOS computer

model, the Environmental Baseline and the Water Development Baseline, project
configurations for the subject water rights to be modeled, modeling approach, and
modeling results.
1.3 STUDY AREA
The Little Snake River Basin is located in south-central Wyoming and northwest
Colorado. The Little Snake River flows into the Yampa River east of Dinosaur National
River. Located within the Upper Colorado River Basin, the Little Snake River falls under
Monument where the Yampa enters the Green River, a major tributary to the Colorado
the provisions of the Upper Colorado River Basin Compact dated October 11, 1948.
Figure 1 shows the general location of the study area.
The Little Snake River Basin encompasses an area of about 4,000 square miles,
slightly more than half of which is in Wyoming. Major tributaries to the Little Snake
include Battle, Slater, Savery, Willow and Muddy Creeks. Elevations in the basin range
from over 10,000 feet in the Sierra Madre mountains along the Continental Divide on the
eastern edge of the basin, to about 5,500 feet at the confluence with the Yampa River.
Precipitation in the basin ranges from 8 to 10 inches annually in the lower, more and
region, to at least 35 inches atop the Continental Divide.
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