7423

• UCREFRP Catalog Number: 7423
• Author: U.S. Bureau of Reclamation.
• Title: Glen Canyon Environmental Studies Draft Report, September 1987.
• USFW Year: 1987.
• USFW - Doc Type: Washington, D.C.
• Copyright Material: NO

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III Table VI-1. Basis for assessing the impact of flows on critical resources.

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Resource

Population size

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H~ck Chlb

Common Native Fish

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Trout

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Trout Fishing

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Vegetation & ~ildlife

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~hite-~ater Boating

Beaches

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Flow Sensitive Aspect

Area of spawning and rearing habitat
at the mouth of the Little Colorado River

Number and stability of backwaters

Spawning and adul t stranding above
Lees Ferry

Recreation value of the fishery at

Lees Ferry and the probability of
accidents

The areal extent of vegetation

Recreational value of the experience
and ,the probability of accidents

Probability of erosion and loss of
sedimel'lt

Sensitive Period

May to June

June to August

December to March

September to April

All year

May to October

All year

I~ct Measure

Population size

Population size

Benefits and safety

Areal extent

Benefits and safety

Areal extent

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