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

Department (AGF), GCES Office, FWS, NPS,
Salt River Project.
(b.) Statistical analysis of sampling effort:
Estimated Cost: $5,000; Responsible
Parties: AGF, GCES Office, FWS, NPS
(GCNP).
(c.) Continuation of monitoring efforts on
rainbow trout population in the Lee's
Ferry tailwater: Estimated Cost: $10,000;
Responsible Parties: AGF, GCES Office,
FWS, NPS (GCNRA).
(d.) Age/growth studies of stocked rainbow
trout: Estimated Cost: $7500; Responsible
Parties: AGF, GCES Office, FWS, NPS
(GCNRA).
(e.) Taxonomy and ecology of invertebrate
(e.g., Chironomids) food resources:
Estimated Cost: $20,000; Responsible
Parties: AGF, NPS, GCES Office, FWS.
Total Estimated Cost: $50,000
Time to Complete: 6 months for initiation, 2-4
years for program completion.
2. Access to spawning habitat and stranding
of fishes.
Major Premise: Access to spawning habitat (tribut-
aries [e.g., Nankoweap Creek and Little Colorado
River], gravel bars [Lee's Ferry tailwater], and
backwaters [Grand Canyon National Park]) is impor-
tant for trout and native fishes (including the
endangered humpback chub). Stranding of fish by
low and fluctuating flows occurs year-round.
Stage/discharge relationships for the primary
spawning areas need to be determined prior to
analysis of impacts.
Estimated Cost: $15,000
Responsible Parties: Reclamation, NPS, USGS, AGF,
FWS, GCES Office.
Time to Complete: 1 year.
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