7754

• UCREFRP Catalog Number: 7754
• Author: Harris, R., H. Sersland and F. P. Sharpe.
• Title: Realities of Providing Water for Endangered Fishes in the Upper Colorado River System.
• USFW Year: 1981.
• USFW - Doc Type: \
• Copyright Material: NO

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by the year 2030, it must be remembered that the majority of the reduction will

occur during high spr~ng runoff. Regulation of streamflows may therefore,

1n some cases provide increased flows during specified times of the year when

the needs of endangered fish could be critical.

Comparing the depletions in the three river basins with the data we are now

gat~ering on the distribution, abundance, and flow requirements of the endangered

fishes, we should be able to develop some flexibility in our release patterns to

assure the fish's continued survival.

Ultimately, our challenge will be to determine and weigh the econom1C and social

values of the food and fiber, electric power, recreation, fish and wildlife, and

flood cOhtrol in a,'l:tighly competitive water use situation. Tnese values will
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have to be 'related .to the development an~ scheduled rel~ase of water and will

requ1re all of us to make comprom1ses thit will allow us to meet human needs

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while protecting and preserving the endangered Colorado River Fishes.

*Technical evaluation and flow estimates provided by R..Wayne Cheney and
Don H. Barnett, Water and Land Division, Upper Colorado Region, Bureau of
Reclamation.

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