7380

• UCREFRP Catalog Number: 7380
• Author: U.S. Bureau of Reclamation.
• Title: Glen Canyon Environmental Studies Phase II Technical Study Plan Outline
• USFW Year: 1989.
• USFW - Doc Type: Fiscal Year 1989, and Process for Completion of the Technical Studies.
• Copyright Material: NO

Responsible Parties: NPS, Grand Canyon National
Park (GCNP); GCES Office.
Time to Complete: 6 months.
6.
Grand Canyon campsite stabilization and
recovery.
Major Premise: Due to the removal of sediment and
vegetation at certain Grand Canyon campsites by the
high flows (1983-85) and the reinitiation of
fluctuating flows from Glen Canyon Dam, critical
campsites in narrow reaches of the river corridor
in Grand Canyon National Park and Glen Canyon
National Recreation Area are impacted. Evaluation
of the potential for stabilization and recovery of
campsites by revegetation and renovation in Grand
Canyon (in addition to the sediment deposition
studies) will be made at the Cremation Camp (River
Mile 87) and Lower Bass Camp (River Mile 108).
Estimated Cost: $11,000
Responsible Parties: NPS
Office.
(GCNP & GCNRA), GCES
Time to Complete: 6 months.
B.
TROUT FISHERY STUDIES
1.
Development of studies of the effect of
low and fluctuating flows on rainbow
trout.
Major Premise: The Assistant Secretaries' direc-
tive letter (June 16, 1988) called for additional
study of the trout fishery. This study will focus
on the Glen Canyon Dam tailwater and the effect of
low and fluctuation flow on the trout life stages,
water quality, spawning, food base, and biologic
productivity. These studies will also investigate
nutrient loading from Lake Powell and tailwater
trophic relationships. To equate operations with
trout survivorship and growth requires development
of the following technical information.
(a.) Development of specific technical
studies: Estimated Cost: $7500; Respon-
sible Parties: Arizona Game and Fish
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