SW4220301_Design Calculations_20220606 (3)

American Proud Participant in NTPEP and Proud Member of. Product Participant of.
gift
Excelsior DOR
Allon C..4
Com pany 9 w1 ECA PILRFORMANCIL
M E M B E R i
Earth Science Division
Curlex®11(.98)
EROSION CONTROL BLANKET
SPECIFICATION
PART I - GENERAL
1.01 Summary
A. The erosion control blanket contains excelsior wood fibers for the purpose of erosion control and
revegetation as described herein.
B. This work shall consist of furnishing and installing the erosion control blanket; including fine
grading, blanketing, stapling, and miscellaneous related work, in accordance with these standard
specifications and at the locations identified on drawings or designated by the owner's
representative. This work shall include all necessary materials, labor, supervision, and equipment
for installation of a complete system.
C. All work of this section shall be performed in accordance with the conditions and requirements of
the contract documents.
D. The erosion control blanket shall be used to prevent surface erosion and enhance revegetation.
Based on a project -by -project engineering analysis, the blanket shall be suitable for the following
applications:
1. Slope protection
2. Channel and ditch linings
3. Reservoir embankments and spillways
4. Culvert inlets and outfalls
5. Dikes, levees, and riverbanks
1.02 Performance Requirements
A. Erosion control blanket shall provide a temporary, biodegradable cover material to reduce slope
and/or channel erosion and enhance revegetation. Erosion control blanket performance capabilities
shall be determined by ASTM D 6459, "Determination of Erosion Control Blanket (ECB)
Performance in Protecting Hillslopes from Rainfall -Induced Erosion", and ASTM D 6460,
"Determination of Erosion Control Blanket (ECB) Performance in Protecting Earthen Channels
from Stormwater-Induced Erosion."
MADE IN
ft
THE u.s.A
850 Avenue H East I Arlington, Texas 76011
Phone [phone]-SOIL I Fax [phone] www.Curlex.com
W0516RI 116

B. Blanket performance requirements:
Slopes: < 1H:1V
C factor: .022
Shear Stress: 2.5 lb/ft2 (120 Pa)
Velocity: 10.0 ft/sec (3.1 m/sec)
Functional Longevity': < 30 months
' Functional Longevity varies from region to region because of differences in climatic conditions.
1.03 Submittals
A. Submittals shall include complete design data, Product Data Sheets, Product Netting Information,
SDS, Staple Pattern Guides, Installation Guidelines, Manufacturing Material Specifications,
Manufacturing Certifications, CAD details, and a Manufacturing Quality Control Program. In
addition, the Manufacturer shall provide a test report providing data showing the performance
capabilities of the erosion control blanket along with reference installations similar in size and scope
to that specified for the project.
1.04 Delivery, Storage, and Handling
A. Erosion control blanket shall be furnished in rolls and wrapped with suitable material to protect
against moisture intrusion and extended ultraviolet exposure prior to placement. Each roll shall be
labeled with a date code identification, which allows for sufficient tracking of the product back to
date of manufacturing and for quality control purposes.
B. Erosion control blanket shall be of consistent thickness with fibers distributed evenly over the entire
area of the blanket.
C. Erosion control blanket shall be free of defects and voids that would interfere with proper
installation or impair performance.
D. Erosion control blanket shall be stored by the Contractor in a manner that protects them from
damage by construction activities.
PART II - PRODUCTS
2.01 Erosion Control Blanket
A. Erosion control blanket shall be Curlex II .98, as manufactured by American Excelsior Company,
Arlington, TX (1-866-9FIBERS).
B. Curlex II.98 erosion control blanket (ECB) consists of a specific cut of naturally seed free Great
Lakes Aspen curled wood excelsior with 80% of the fibers >_ 6 inches in length. It is of consistent
thickness with fibers evenly distributed throughout the entire area of the blanket. The top and
bottom of each blanket is covered with green polypropylene netting containing oxo-biodegrader and
UV additives. Curlex II .98 is also available as QuickGRASS° (green pigment). Curlex II.98 shall
be manufactured in the U.S.A.
MADE IN
THE U.s.A
850 Avenue H East I Arlington, Texas 76011
Phone [phone]-SOIL I Fax [phone] www.Curlex.com
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W0516RI 116

C. Erosion control blanket shall have the following material characteristics:
Width
4.0 ft (1.2 m)
8.0 ft (2.4 m)
16.0 ft (4.9 m)
Length
90.0 ft (27.4 m)
90.0 ft (27.4 m)
90.0 ft (27.4 m)
Area
40.0 yd2 (33.4 in)
80.0 yd2 (66.9 in)
160.0 yd2 (133.8 in)
Weight b
39.2 lb (17.8 kg)
78.41b (35.6 kg)
156.8 lb (71.2 kg)
Fiber Count
�9,400 per yd2
(�11,280 per in)
�9,400 per yd2
(�11,280 per in)
�9,400 per yd2
(�11,280 per m2)
Fiber Length (80% min.)
>_6.0 in (>_15.2 cm)
>_6.0 in (>_15.2 cm)
>_6.0 in (>_15.2 cm)
Mass per Unit Area (± 10%)
0.981b/yd2
(0.53 kg/m)
0.981b/yd2
(0.53 kg/m)
0.981b/yd2
(0.53 kg/m )
Net
Openings
Polypropylene
1.0 in x 2.0 in
(25.4 nun 50.8 mm)
1.0 in x 2.0 in
(25.4 mm x 50.8 mm)
1.0 in x 2.0 in
(25.4 mm x 50.8 min)
TYPICAL INDEX VALUES
Index Property
Test Method
Value
Thickness
ASTM D 6525
0.46 in (11.68 min)
Light Penetration
ASTM D 6567
20.5%
Resiliency
ASTM D 1777/ECTC
53%
Mass per Unit Area
ASTM D 6475
0.761b/yd2 (0.412 kg/m2)
MD -Tensile Strength Max.
ASTM D 6818
139.2 lb/ft (2.03 kN/m)
TD-Tensile Strength Max.
ASTM D 6818
60.0 lb/ft (0.88 kN/m)
MD -Elongation
ASTM D 6818
36.7%
TD-Elongation
ASTM D 6818
29.5%
Swell
ECTC Procedure
56%
Water Absorption
ASTM D 1117/ECTC
230%
�,d
Bench -Scale Rain Splash
ASTM D 7101
SLR = 10.09 2 in/hr
Bench -Scale Rain Splash
ASTM D 7101
SLR = 13.84 4 in/hr c,d
Bench -Scale Rain Splash
ASTM D 7101
SLR = 128.97 6 in/hr �,d
Bench -Scale Shear
ASTM D 7207
2.5 lb/ft@ 0. in soil loss d
Germination Improvement
ASTM D 7322
575%
b Weight is based on a dry fiber weight basis at time of manufacture. Baseline moisture content of Great Lakes Aspen excelsior is 22%.
` SLR is the Soil Loss Ratio, as reported by NTPEP/AASHTO. d Bench -scale index values should not be used for design purposes.
2.02 Staples
A. Staples shall be a minimum 4 in biodegradable E-Staple®, as provided by American Excelsior
Company, or 6 in wire for cohesive soils and 6 in biodegradable E-Staple®, as provided by
American Excelsior Company, or 8 in wire for non -cohesive soils. All staples shall have a U-
shaped top.
PART III - EXECUTION
3.01 Blanket Supplier Representation
A. Contractor shall coordinate with the blanket supplier for a qualified representative to be present at
the job site at the start of installation to provide technical assistance as needed. Contractor shall
remain solely responsible for the quality of installation.
MADE IN
ft
THE u.s.A
850 Avenue H East I Arlington, Texas 76011
Phone [phone]-SOIL I Fax [phone] www.Curlex.com
3
W0516RI 116

3.02 Site Preparation
A. Before placing erosion control blanket, the Contractor shall certify that the subgrade has been
properly compacted, graded smooth, has no depressions, voids, soft or uncompacted areas, is free
from obstructions such as tree roots, protruding stones or other foreign matter, and is seeded and
fertilized according to project specifications. The Contractor shall not proceed until all
unsatisfactory conditions have been remedied. By beginning construction, the Contractor signifies
that the preceding work is in conformance with this specification.
B. Contractor shall fine grade the subgrade by hand dressing where necessary to remove local
deviations.
C. No vehicular traffic shall be permitted directly on the erosion control blanket.
NOTE: Topsoiling, seeding, and fertilizing is not included in this specification.
3.03 Slope Installation
A. Erosion control blanket shall be installed as directed by the owner's representative in accordance
with manufacturer's Installation Guidelines, Staple Pattern Guides, and CAD details. The extent of
erosion control blanket shall be as shown on the project drawings.
B. Erosion control blanket shall be orientated in vertical strips and anchored with staples, as identified
in the Staple Pattern Guide. Adjacent strips shall be abutted or overlapped to allow for installation
of a common row of staples that anchor through the nettings of both blankets. Horizontal joints
between erosion control blankets shall be sufficiently overlapped with the uphill end on top for a
common row of staples so that the staples anchor through the nettings of both blankets.
C. Where exposed to overland sheet flow, a trench shall be located at the uphill termination. Erosion
control blanket shall be stapled to the bottom of the trench. The trench shall be backfilled and
compacted. Where feasible, the uphill end of the blanket shall be extended three feet over the crest
of the slope.
D. Slope erosion control blanket shall be overlapped by the channel erosion control blanket sufficiently
for a common row of staples to anchor through the nettings of both blankets when terminating into a
channel.
3.04 Channel Installation
A. Erosion control blanket shall be installed as directed by the owner's representative in accordance to
manufacturer's Installation Guidelines, Staple Pattern Guides, and CAD details. The extent of
erosion control blanket shall be as shown on the project drawings.
B. Erosion control blanket shall be installed parallel to the flow of water. The first roll shall be
centered longitudinally in mid -channel and anchored with staples as identified in the Staple Pattern
Guide. Subsequent rolls shall follow from channel center outward and be overlapped to allow
installation of a common row of staples so that the staples anchor through the nettings of both
blankets.
MADE iN
as850 Avenue H East I Arlington, Texas 76011
THE us.,n Phone [phone]-SOIL I Fax [phone] www.Curlex.com
W0516RI 116
4

C. Successive lengths of erosion control blanket shall be overlapped sufficiently for a common row of
staples with the upstream end on top. Staple the overlap across the end of each of the overlapping
lengths so that staples anchor through the nettings of both blankets.
D. A termination trench shall be located at the upstream termination. Erosion control blanket shall be
stapled to the bottom of the trench. The trench shall be backfilled and compacted.
3.05 Quality Assurance
A. Erosion control blanket shall not be defective or damaged. Damaged or defective materials shall be
replaced at no additional cost to the owner.
B. Products shall be manufactured in accordance to a documented Quality Control Program. At a
minimum, the following procedures and documentation shall be provided upon request:
1. Manufacturing Quality Control Program Manual
2. First piece inspection and documentation of products produced to assure component
materials and finished product tolerances are within manufacturer specifications.
3. Additional inspections for product conformance shall be conducted during the run after the
first piece inspection.
4. Moisture content readings recorded for each manufacturing day.
5. Recorded weight of every erosion control blanket manufactured.
6. Each individual erosion control blanket shall be inspected, weighed, and documented prior
to packaging for conformance to manufacturing specifications.
7. Documentation and record retention for at least two years.
3.06 Clean-up
A. At the completion of this scope of work, Contractor shall remove from the job site and properly
dispose of all remaining debris, waste materials, excess materials, and equipment required of or
created by Contractor. Disposal of waste materials shall be solely the responsibility of Contractor
and shall be done in accordance with applicable waste disposal regulations.
3.07 Method of Measurement
A. The erosion control blanket shall be measured by the square yard of surface area covered. No
measurement for payment shall be made for overlaps, fine grading, trenching, staples, or other
miscellaneous materials necessary for placement of the erosion control blanket.
3.08 Basis of Payment
A. The accepted quantities of erosion control blanket shall be paid for at the contract unit price per
square yard, complete in place.
Payment shall be made under:
Pay Item
Erosion Control Blanket
Pay Unit
Square Yards
Disclaimer. Curlex is a system for erosion control and revegetation on slopes and channels. American Excelsior Company (AEC)
believes that the information contained herein to be reliable and accurate for use in erosion control and re -vegetation applications.
However, since physical conditions vary from job site to job site and even within a given job site, AEC makes no performance
guarantees and assumes no obligation or liability for the reliability or accuracy of information contained herein for the results,
safety, or suitability of using Curlex, or for damages occurring in connection with the installation of any erosion control product
whether or not made by AEC or its affiliates, except as separately and specifically made in writing. These specifications are subject
to change without notice.
MADE IN
850 Avenue H East I Arlington, Texas 76011
THE IJ.SA Phone [phone]-SOIL I Fax [phone] www.Curlex.com
W0516RI 116
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