Conservation Strategies for Growing Communities - Natural ...

GeoRidge. . . low profile, porous berms installed
perpendicular to the direction of flow. The GeoRidge system is
designed to complement the performance of erosion control blankets
in channel and slope applications.
This GeoRidge system has trapped
sediment. Maintenance should be
performed to maintain its effectiveness.
Design Techniques
• Recommended spacing of
G e o R i d g e is directly related to
the channel grade. The steeper the
grade, the closer the spacing.
• Prepare the channel by forming
the shape and grade of the channel.
Install the erosion control
blankets before installing the
G e o R i d g e s y s t e m .
• Place GeoRidge berms perpendicular
to the direction of the
f l o w. Overlap panels by a minimum
of 2 inches. Cut a slot in the
crest of the overlapping berm to
allow contact between the foot of
the berm and the soil.
• Secure berms with pins or staples.
The pin/staple spacing across the
width of the panel should be ten
inches on center for the upstream
leg and 20 inches on center for
the downstream leg.
• G e o R i d g e can be removed after
the site is stabilized and used over
a g a i n .
C h a l l e n g e s / L i m i t a t i o n s
• Silt deposited behind GeoRidge
must be removed periodically to
maintain permeability.
• Allowing excessive sediment to
build up behind the berm will create
a non-porous check structure
which causes overflow and scouring
on the downhill side of the
structure. This can lead to failure
of the system.
A GeoRidge system complements erosion con -
trol blankets to protect areas of concentrated
flow on this site in Iowa’s fragile Loess Hills
r e g i o n .
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