DEPARTMENT of DEPARTMENT of SOIL SCIENCE SOIL SCIENCE NC STATE NC STATE UNIVERSITY UNIVERSITY Straw Wattle Installation Guide for Roadway Projects Straw Wattle Installation Guide for Roadway Projects Dr. Rich McLaughlin and Scott King Soil Science Department NC State University Dr. Rich McLaughlin and Scott King Soil Science Department NC State University
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DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Straw Wattle Installation Guide forRoadway Projects
Straw Wattle Installation Guide forRoadway Projects
Dr. Rich McLaughlin and Scott KingSoil Science Department
NC State University
Dr. Rich McLaughlin and Scott KingSoil Science Department
NC State University
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Straw Wattle
Road
Erosion Control Blanket
The Basics: Simply fit the straw wattle across the ditch with someerosion control blanket beneath it.
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
The erosion control blanket acts as a splash-pad for thewater running over the wattle and helps prevent scouring.
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Important! Make sure the lower spill point ofthe wattles is below the height of the roadwayor you will back up water onto the road.
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Sprinkle 100 grams of PAM over thelower center portion of the wattlewhere the water is going to flow over.
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Ideal BMP SpacingIdeal BMP Spacing• BMPs theoretically spaced such that flow goes
from pool to pool…• BMPs theoretically spaced such that flow goes
from pool to pool…
This slows water velocity down and gives moretime for water to infiltrate into the ground andcauses sediment to fall out of suspension!
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Typical tools and products needed for installation
Metal sod staples and mallet
24” long wooden stakes Erosion control blanket
straw wattle
Close upof themesh
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Typical roadside ditch dimensions here
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Diamond staple pattern
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Covers the ditch centerline
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Splash pad
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Wattle spillway below ditch bank
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Use sod staplesto hold wattle tothe ground
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Place staples in at an angle to the wattle
Weave staples through the mesh casing of the wattle
Nail into the ground, ensuring that the wattle is held down snugly
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Weave the staplesthrough the meshcasing
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Is there a gapat theupturnededge of thewattle?
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Take a bit of leftovererosion control blanketto fill the gap.
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Wedge the blanket into the gap, sealing the wattle to the ground.
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Hammer in several 24” wooden stakes to help with heavy runoff events
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
You might consider putting in a couple of upslopestakes as well for very heavy runoff events.
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Why the upslope stakes?
To keep wattle from folding in on itself!
Although this may be an unnecessary precaution
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Upslope stakes would help hold wattle in place during such an event.
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Finally, sprinkle 100 grams of PAM 705 on the lower, center portionof the wattle where water is going to flow over.
This is not a lot of PAM – only this much!
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Sprinkle 100 grams of PAM 705 on the lower, center portion of thewattle where water is going to flow over.
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Sprinkle 100 grams of PAM 705 on the lower, center portion of thewattle where water is going to flow over.
Between here… and here
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Very good previous resultsVery good previous results
DEPARTMENT of DEPARTMENT of SOIL SCIENCESOIL SCIENCENC STATENC STATE UNIVERSITY UNIVERSITY
Any Questions?Any Questions?
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