7281 ‎(2)‎

• UCREFRP Catalog Number: 7281
• Author: U.S. Fish and Wildlife Service.
• Title: Recovery Implementation Program for Endangered Fish Species in the Upper Colorado River Basin, Environmental Assessment, November 1987.
• USFW Year: 1987.
• USFW - Doc Type: Denver, Colorado.
• Copyright Material: NO

V
Table II-2 (Continued)
Impact Findings of Environmental Assessmentl/
Impacts of the
Potentially Affected Resource Impacts of the Proposed Action "No Action" Alternative
3. Water quality No substantial change in water quality is Same as Proposed Action.
expected.
4. Channel maintenance
Assumed flows will have minimal effects on
channel erosion and sediment deposition.
Slight changes in channel stability may
occur.
Same as Proposed Action.
B. Rare and Endangered Fishes
C. Native Fishes (other than
the rare and endangered
fishes)
The Colorado squawfish, humpback chub, and
bonytail chub will be recovered and taken
off the Endangered Species list; the razor-
back sucker will be managed so that it
would not need the protection of the Endan-
gered Species Act. Note: If the razorback
sucker is listed, it will be treated as the
other species under the Proposed Action.]
There will be no impacts to col dwater
native fishes in headwaters. Exact impacts
to warnwater native fishes are uncertain,
though flow changes, habitat development,
and control of nonnative fishes may result
in minor shifts in species composition and
benefits to warmwater native fishes,
overal 1.
Although the Colorado squawfish, humpback chub,
and bonytail chub will be protected from
extinction, it is not clear that they will be
recovered under this alternative. The razorback
sucker may need to be federally listed as an
endangered species to prevent its extinction.
There will be no impacts to coldwater native fishes
in headwaters. Warnwater native species may
decline in abundance as nonnatives continue to
proliferate, competing with or preying on native
species.
D
m
D
r
m
z
C
m
z
n
r
c
0
z
m
v
O
v
O
cn
m
0
D
C7
O
Z