Instructions / Assembly

ManualsBrandsHanes Geo Components ManualsFencing9 in. x 25 ft Biodegradable Straw Wattle

Sediment Retention Fiber Rolls (SRFRs)

are a manufactured 3 dimensional de-

vice of a specified filler matrix encapsu-

lated within a flexible containment ma-

terial utilized in sediment and flow

control applications. SRFRs are also

known as wattles, logs, socks, tubes or

fiber rolls. SRFRs are available as pre-

fabricated units; constructed into tubu-

lar configurations comprised of rice

straw, wheat straw, excelsior fiber,

wood fiber, coconut fiber, compost, flax

or a similar matrix material. The matrix

material is encapsulated within biode-

gradable or photodegradable netting,

yielding an approximate functional life

of 1 - 3 years. Functional life will vary

depending on factors such as material

composition and site-specific climatic

conditions. SRFRs provide economical

performance and utility for numerous

applications. Finally, as with any erosion

control or sediment control measure,

installation and maintenance is critical to

the success of these products.

SRFRs offer many advantages when used in

slope and channel applications. Once in-

stalled, SRFRs reduce flow velocity, inter-

cept runoff and remove sediment from

polluted waters. Sediment collects up-

stream of the unit and within the fibrous

matrices of SRFRs. Plant material may

also take hold upstream and within the

SRFR matrix. When plant material is estab-

lished, a vegetated buffer is formed

providing permanent erosion control. In an

unvegetated condition, SRFRs serve to

shorten the effective slope length of the

waterway or slope.

Reducing Slope Length for Erosion Control

Introduction

Table of Contents

Introduction

Reducing Slope Length for

Erosion Control

Appropriate Applications

Suggested Spacing

Key Elements for Successful

Product Performance

Installation Instructions on

Bare (Unprotected) Soils

Installation Instructions in

Conjunction with RECP /

HECP

Maintenance & Installation

accelerated erosion. SRFRs provide a reli-

able and economical means to reduce the

effective length of slopes, thus reducing

erosion and sediment discharge to natural

waters.

Slope length and gradient are two factors

that directly affect the erodibility of a

slope and introduce sediment into storm-

water runoff. As many road right-of-

ways are space limited, slopes along

roadsides tend to be steep, leading to

Erosion Control Technology Council

Sediment Retention Fiber Roll (SRFR) General

Usage and Installation Guidelines

April 2011

Version 1.0

Summary of content (8 pages)

PAGE 1
Sediment Retention Fiber Roll (SRFR) General Usage and Installation Guidelines April 2011 Version 1.
PAGE 2
Sediment Retention Fiber Roll (SRFR) General Usage and Installation Guidelines Page 2 Appropriate Applications SRFRs are typically placed along the toe, top, face and at grade breaks of exposed and erodible slopes to shorten the slope length and spread runoff as sheet flow. SRFRs are also frequently used for inlet protection, around temporary stockpiles and even around the perimeter of a job site. SRFRs are also used in channel applications as checks to reduce flow velocity and filter sediment laden flow.
PAGE 3
Sediment Retention Fiber Roll (SRFR) General Page 3 Suggested Spacing (continued) Typical spacing between SRFRs can be calculated as follows for channel applications: Typical spacing between SRFRs for slope applications is recommended in Table 1. Table 1 Nominal Spacing for SRFR Slope Installations Nominal Diameter Spacing (ft) 6" dia. 9" dia. 12" dia. 20" dia.
PAGE 4
Sediment Retention Fiber Roll (SRFR) General Page 4 Key Elements for Successful Product Performance (cont.) Special points of interest:  The drawings shown in this document are available for download at ECTC.org  DWG files are available for designers to import into CADD.  Designers are welcome to modify the drawings for usage in their project specifications.  PDF files are available and may be used for educational purposes. the soil surface is between 12” - 16”.
PAGE 5
Sediment Retention Fiber Roll (SRFR) General Page 5 Installation Instructions on Bare (Unprotected) Soils (cont.) 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 undercutting of soil on the upstream side of the slope.
PAGE 6
Sediment Retention Fiber Roll (SRFR) General Page 6 Installation Instructions on Bare (Unprotected) Soils (cont.) dicular to a horizontal ground plane (see Figure 3, “Entrenchment and Staking Detail”). Driving stakes perpendicular to a sloped ground surface may compromise the stability of the SRFR. An optional method of securing the SRFR is to drive stakes on both sides of the SRFR and lace rope between the stakes securing the SRFR.
PAGE 7
Sediment Retention Fiber Roll (SRFR) General Installation Instructions on Bare (Unprotected) Soils (cont.) Figure 5a. Overlapping SRFRs with laced stakes Figure 5b.
PAGE 8
Installation Instructions in Conjunction with RECP / HECP For placement in conjunction with an HECP, install SRFR as directed in Step One through Step 8 above; then install the HECP as directed by manufacturer’s instructions. er’s instructions, then install SRFRs on top of RECP ensuring intimate contact with the RECP along the entire length of the unit. Secure SRFR(s) as directed in Steps Five through Seven above.