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613.02 Materials Erosion control blanket shall conform to the requirements
specified in the following Sections of Division 700 - Materials . Erosion Control Blankets 717.061 Ground Anchors 717.063
613.03 Site Preparation The area for erosion control blankets shall be prepared as
follows: Soil must be loose or scarified, smoothly raked and free of sto nes, litter, and any abrupt ground surface roughness under the blanket.
613.04 Seeding All seed shall be sown before installing erosi on control blankets.
No loam will be required for Seeding, unless called for on plan s or designated. Seeding, Method Number 2 will be used unless otherwise specified.
613.05 Installation On Slopes and in ditches, blankets shall be aligned in the
direction of water flow and al ong the contours of berms. The u phill end of blanket shall be anchored in a trench no less than 6 inches deep and overlapped on the adjoining ends no less than 3 inches. Parallel strips shall be overlapped 4 inches on the sides. Approved anchor staples shall be placed at a maximum spacing of 3 feet on cente r or as required by the manufacturer, whichever is closer.
613.08 Method of Measurement Erosion control blanket will be measured by the
square yard based on the width and length of the blanket measur ed on the ground.
613.09 Basis of Payment Erosion control blankets of the type specified will be paid
for at the contract unit price pe r square yard complete in plac e and accepted. Such payment shall be full compensation for furnishing and installing the bl ankets and initial seeding under blanket in accordance with this specification and for all requi red maintenance. Payment will be made under: Pay Item P a y U n i t 613.319 Erosion Control Blanket S q u a r e Y a r d SECTION 614 - GEOCELL SLOPE PROTECTION
614.01 Description This work shall consist of designing, furn ishing and placing a
Geocell Slope Protection System, in reasonably close conformity with the lines and grades shown on the Plans, as specified herein, and as directed by the Resident. The Geocell Slope Protection System consists of subgrade preparation, non-woven e rosion control geotextile, geocell material into which select infill material is placed, i nfill material, anchors, and 6-46 surface treatment. This work includes subgrade preparation and placing and compacting Granular Borrow to the subgrade elevation.
614.02 Submittals Submittals shall comply with MaineDOT Secti on 105-General
Scope of Work. All information shall be submitted to the Reside nt thirty (30) days prior to the Geocell Slope Protection System installation.
A.Product Data. Submit manufacturer’s product data. B. Supplier Design. Submit manufacturer’s project-specific de sign recommendations or engineering design for cell size, stake anchor length and stake anchor spacing. The project specific design shall be prepared, checked, and sealed by a Pro fessional Engineer licensed in the State of Maine.
C.Shop Drawings. Submit manufacturer’s Shop Drawings includi ng section layout, direction of expansion, and anchor stake locations. The Shop Dr awings shall be sealed by a Professional Engineer licensed in the State of Maine.
D.Samples. Submit manufacturer’s samples of geocell sections , anchors, and end caps.
E.Material Certification. Submit manufacturer certification of polyethylene used to make geocell material including percentage of carbon black, pol yethylene density, and environmental stress crack resistance (ESCR).
614.03 Materials Materials for the Geocell Slope Protection S ystem shall meet the
requirements of the following sections: 614.031 Geocell Sections The geocell sections shall be a poly ethylene sheet strip assembly connected by a series of offset, full depth, ultrasoni c welded seams aligned perpendicular to the longitudinal axis of the strips, which, wh en expanded, form walls of flexible 3-dimensional, cellular slope protection confinement s ystem. The geocell material shall be manufactured by Presto Products Company, Appleton, Wis consin, Webtec Geosynthetics, Charlotte, North Carolina, or an approved equal. Sections shall be in conformance with manufacturers design recommendations or engine ering design for this project.
1.Geocell base material The geocell material shall be polyethylene stabilized with blac k carbon, with the following properties:
a.Density, ASTM D 1505: 58-60 pcf. b. Environmental stress crack resistance (ESCR) ASTM D 1693: 30 00 hours.
c.Ultraviolet light stabilization: carbon black. d. Carbon Black Content: 1.5 t o 2 percent by weight, through th e addition of a carrier with a certified carbon black content.
e.Homogeneously distributed through material.
Source: Maine Standard Specifications for Road and Bridge Construction, 2020 Edition. Pages 515–516 of 817.
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