Instructions / Assembly

anchor trench, excavate an anchor
trench along the area where the SRFR is
to be place. The depth and width of the
anchor trench is dependent upon the
soil type and dimensions of the SRFR.
Typically, the anchor trench should be a
range of 1 to 3 inches. The anchor
trench is utilized to minimize under-
cutting of soil on the upstream side of
the slope. The anchor trench should
match the installation profile and con-
tour of the installed device. SRFRs in-
stalled on flat surfaces as perimeter
control or inlet protection may not re-
quire an anchor trench, per manufactur-
er’s recommendation. For SRFRs that
do not require an anchor trench, secure
the SRFRs directly to the ground sur-
face, as directed by Step 5.
Step Four: For channel applications, the
SRFR should be placed across the width
of the channel and perpendicular to the
centerline of the channel (direction of
flow). The SRFR must be installed suffi-
ciently up the channel banks to prevent
flanking or concentrated flow around
the ends of the SRFR. For slope applica-
tions, units should be placed perpendic-
ular to the downslope flow line. Ends of
the unit should be turned upslope forty-
five degrees to prohibit flanking of the
installation. See Figure 2 for example
of slope installation terminal end.
Step Five: Place the SRFR in the anchor
trench. The SRFR must be installed en-
suring intimate contact with the soil
surface along the entire length of the
unit.
Step Six: Secure the SRFR with stakes or
pins along the length of the unit. Stakes
should be driven in vertically, perpen-
Page 5 Sediment Retention Fiber Roll (SRFR) General
Figure 3a. Stake
through the
middle of the
SRFR
Figure 3b. Stake
through netting
only on top of
RECP/HECP
Figure 3c. Stake
through netting
only on soil
Figures 3a, 3b, 3c Entrenchment and Staking Details
Installation Instructions on Bare (Unprotected) Soils (cont.)