9383

• UCREFRP Catalog Number: 9383
• Author: SWCA, I.
• Title: Recovery Goals for the four Colorado River Endangered Fish Species.
• USFW Year: 2000.
• USFW - Doc Type: Logan.
• Copyright Material: NO

River Reach

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Five flow recommendations packages have been developed in the upper basin in response
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t his Jcognition to provide flows with the necessary magnitude and timing for conservation of
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t otorado River endangered species (Table 1). Three of these packages are associated with
environmental impact statements on the operations of Flaming Gorge Dam, Navajo Dam, and the
Aspinall Unit, and these flow recommendations will become integral to the annual operation
plans for these facilities. The Yampa River and IS-mile reach flow recommendations packages
will be implemented through appropriate inter-agency and programmatic agreements. In addition

to these flow reco

ations, an environmental impact statement in 1995 established releases

from Glen Canyon, that protect downstream resources. These flow packages encompass
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much of the knowiitIstonc habitat of the the endangered fishes.

Table 1. Flow recommendations packages and river reaches affected by each package.

Flow Recommendations Package

I. Flow and Temperature Recommendations for
Endangered Fishes in the Green River Downstr
Flaming Gorge Dam (Muth et al. 2000)

2. Flow Recommendations for the Yampa
(Modde and Smith 1995)

3. Flow Recommendations for the IS-Mile Reach
(Osmundson and Kaeding 1991, Osmundson et a1.
1995)

4. Flow Recommendations to benefit endangered
fishes in the Colorado and Gunnison rivers (McAda
2000)

5. Flow Recommendations for the San Juan River
(Holden 1999)

6. Glen Canyon Dam EIS preferred alternative;
modified low fluctuating flows (U.S. Department of
the Interior 1995)

Green River from Flaming Gorge Dam to the
confluence of the Green and Colorado rivers.

The Yampa River to the confluence with the Green
River

Colorado River in the Grand Valley of Colorado

Gunnison River from the Aspinall Unit downstream to
the confluen the Colorado River, and the
Colorado Ri wnstream of the Gunnison River

The San J\1 'ver downstream of Navajo Dam to the
Lake Powell inflow at Clay Hills

Colorado River from Glen Canyon Dam downstream
to the Lake Mead inflow

Specific flow criteria are extensive in each of the flow recommendations packages and
are therefore not presented in this document. Flows needed by the other Colorado . r
endangered fishes mimic the natural hydro graph, and include high spring flows, and

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