8169a

• UCREFRP Catalog Number: 8169a
• Author: Brookshire, D. S., M. McKee and G. Watts.
• Title: Draft Economic Analysis of Proposed Critical Habitat Designation in the Colorado River Basin for the Razorback Sucker, Humpback Chub, Colorado Squawfish, and Bonytail.
• USFW Year: 1993.
• USFW - Doc Type: \
• Copyright Material: NO

Mexico, Utah, Wyoming, and in the states of Baja California Norte and the Sonora of
Mexico.
USFWS is proposing that 15 reaches of the Colorado River system (Figure I-2-1) be
designated as critical habitat for the razorback sucker. In the Upper Basin, critical habitat
designation is being proposed for areas of the Green, Yampa, Duchesne, Colorado, White,
Gunnison, and San Juan rivers. Portions of the Colorado, Gila, Salt, and Verde rivers are
being proposed in the Lower Basin. Of the historical range of the razorback sucker, 52
percent is now proposed for designation as critical habitat. This area encompasses the major
basins of the historical range.
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Figure I-2-1. Map of Proposed Critical Habitat for the Razorback Sucker.
I-6