Draft EIS_072312.pdf - Middle Fork American River Project ...

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Resource No-Action Alternative Proposed Action
Aquatic Recruitment to trout
populations in peaking
reach low
Minimum flows relatively
constant throughout the
year, no provisions for
planned pulse flows that
would simulate
unregulated streams or
downramping that would
avoid stranding
Some enhancement of
recruitment from gravel
augmentation
Minimum flows increased,
with higher minimum flows
during the spring trout
spawning and incubation
period; spring pulse flows
would simulate natural high
flows; protective
downramping; would result
in enhanced trout
populations and aquatic
habitat
Staff–Recommended
Alternative Alternative 1
Same as proposed action
but spawning habitat in
the Ralston afterbay
bypassed reach would be
enhanced with gravel
placement or other
measures
Similar to proposed action
for bypassed reaches;
generally higher
minimum flows in the
peaking reach would
build on proposed project
enhancements
Same as proposed
action
Same as staff
alternative