1.4
GENERAL METHODOLOGY
A.
Erosion and sedimentation control methods shall consider all factors that
contribute to erosion and sedimentation including, but not limited to, the
following:
Topographic features of the Project area.
Types, depth, slope and areal extent of the soils.
Proposed alteration of the area.
Amount of runoff from the Project area, borrow areas, and the
upgradient watershed areas.
Staging of earthmoving activities.
Temporary control measures and facilities for use during earthmoving.
PWNr
nN
PART 2 - PRODUCTS
2.1
MATERIALS
A.
Sediment Filter Logs
1. Sediment Filter Logs shall be a compost-filled bio- or photo-degradable
tubular mesh product capable of trapping sediment before or within the
device while allowing stormwater runoff to pass through.
2. The mesh shall be of natural biodegradable materials to avoid problems
with the sock trapping endangered snakes or lizards, such as
biodegradable jute, sisal, burlap, or coir fiber fabric.
3. |The mesh fabric shall must be clean, evenly woven, and free of encrusted
concrete or other contaminating materials and free from cuts, tears,
broken or missing yarns and thin, open, or weak places.
Each sediment Filter Log shall have a diameter of no less than 8 inches.
The mesh opening shall be no smaller than ¥% inch.
The compost shall be derived from green material consisting of chipped,
shredded, or ground vegetation, or clean recycled wood products, and be
reasonably free of visible contaminates. It shall not be derived from
mixed municipal solid waste and shall not contain paint, petroleum
products, pesticides or any other chemical residues harmful to animal life
or plant growth. The compost shall not possess objectionable odors.
7. The Sediment Filter Log must have a minimum durability of one year
after installation.
Dn
Erosion Control Blankets shall be a Rolled Erosion Control Product that
complies with Temporary Slope Stabilization Type C as defined Section 645 of
the NHDOT Specifications.
Mulch shall consist of cured straw free from primary noxious weed seeds,
twigs, debris and rough or woody materials. Mulch shall be free from rot or
mold and shall be acceptable to the ENGINEER or OWNER. Alternately, mulch
shall be specially processed cellulose homogeneous fiber containing no growth
or germination-inhibiting factors. Processed cellulose fiber shall be
manufactured in such a manner that after addition and agitation in slurry
tanks with water, the fibers in the material become uniformly suspended to
File No. 3066.09 Erosion and Sedimentation Control 02000 - 2 of 4 December 2017
