9461

• UCREFRP Catalog Number: 9461
• Author: Colorado Riparian Association.
• Title: Colorado Guide
• USFW Year: 2001.
• USFW - Doc Type: Stream Corridor.
• Copyright Material: NO

The following is a list of techniques that can be used in stream corridor restoration projects. It is important
to recognize that such restoration projects should be designed by experienced people and need to reflect
local conditions. For a more thorough treatment of stream corridor restoration, see Stream Corridor
Restoration - Principles, Processes and Practices (see page 35 for full citation and internet address).
Instream Practices

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Fish Passage Iescription
Iostream changes
which enhance the
opportunity for target
fish species to freely
move to upstream areas
for spawning, habitat
utilization, and other
life functions. Applications and Eftectiveness
• i:.1n h,c appropriate where human pla?c?l obstnicikm<
such as debris accumulations and culverts interfere with
fish migration.
• The aquatic ecosystems must be carefully evaluated to
assure that fish passages do not adversely impact other
aquatic biota and stream corridor functions.
• Slopes, depths, and relative positions of the flow profile
for various flow ranges are important considerations.
• Designs vary from simple to complex depending on the
site and the target species. Cost

$$$
Felled trees placed • Can provide benefits at a low installation cost.
along the streambank • Particularly advantageous in streams where the bed is
to provide overhead unstable and felled trees can be secured from the top of

?-? cover, aquatic organ-
ism substrate and bank.
• Channels must be large enough to accommodate trees
$
habitat, stream current without threatening bank erosion and limiting needed
deflection, scouring, channel flow capacity.
Tree Cover deposition, and drift • Design of adequate anchoring systems is necessary.
catchment. • Not recommended if debris jams on downstream bridges
might cause subsequent problems.
• Require frequent maintenance.
Streambank
Treatments Description Applications and Effectiveness Cost
Re-grading sn-eambanks ' Most succcsIhil on sncambanks where moderate erosion
X to a stable slope, and channel migration are anticipated.
• Reinforcement at the toe of the embankment is often
placing topsoil and
needed.
®
"- other materials needed
for sustaining plant • Enhances conditions for colonization of native species.
$$$
growth, and selecting, ' Used in conjunction with other protective practices
Bank Shaping and Planting installing, and establish- Where flow velocities exceed the tolerance range for
ing appropriate plant available plants, and where erosion occurs below base
flows.
species.
• Streambank soil materials, probable groundwater
fluctuation, and bank loading conditions are factors for
determining appropriate slope conditions.
• Slope stability analyses are recommended.
• Form an immediate protective cover over the stream
Combination of live bank.
1
k
es,
live
fa
t
• Capture sediment during flood flows.
in
cuttin t
ranc
h
b
cuttings
and • Provide opportunities for rooting of the cuttings over the
-- installed to cover streambank. $$$
and physically protect . Rapidly restores riparian vegetation and streamside
streambanks; eventual- habitat.
Brush Mattresses ly to sprout and . Enhance conditions for colonization of native vegetation.
establish numerous . Limited to the slope above base flow levels.
individual plants. . Toe protection is required where toe scour is anticipated.
• Appropriate where exposed streambanks are threatened
by high flows prior to vegetation establishment.
• Should not be used on slopes which are experiencing
mass movement or other slope instability.