WSP03985

• File Number: 8200.765
• Description: Little Snake River General
• State: CO
• Basin: Yampa/White
• Water Division: 6
• Date: 4/20/1990
• Author: Western Water Consul
• Title: Report on Modeling Approach and Project Configurations for Little Snake River Depletion Study
• Water Supply Pro - Doc Type: Report/Study

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be compared to those under the Water Development Baseline, defined on Page 18 hereof,

as needed to determine project impacts.

The purpose of this initial report is to present information on the recommended

computer model, the Environmental Baseline and the Water Development Baseline,

project configurations for the subject water rights to be modeled, and the modeling

approach,

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

Monument where the Yampa enters the Green River, a major tributary to the Colorado

River. Located within the Upper Colorado River Basin, the Little Snake River falls under

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 arid

region, to at least 35 inches atop the Continental Divide,

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