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Vegetated coir logs

Vegetated coir logs are biodegradable coconut coir pith logs tightly

packed in tubular netting. They are highly effective in reducing water

velocity at the base of slopes, shorelines, and streambanks. They

are used for controlling dry slope erosion and establishing wetland

edges and stream channel banks.

Coir logs are available either vegetated or unvegetated, in a variety

of sizes. They are grown on a contract basis. As the native species

establish their root systems, the coir logs biodegrade over several

years, allowing a native shoreline to develop. Upon request, Cardno

can provide pre-vegetated coir logs with specific plant species. A

minimum of 8 to 12 weeks growing time is required. Winter orders

may require additional lead time.

Specifications

Coir log material:

100% biodegradable coconut fiber, plugged with

native wetland plants. Vegetated coir logs can be custom grown

based on your site conditions. Please allow 8 to 12 weeks lead time.

Plugs are planted 2 per linear foot.

Coir fiber density:

30 cm x 3 m – 11kgs/lm. Larger diameters can

be provided with sufficient lead time.

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Exterior net structure:

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Coir net: diamond shape mesh.

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PP net: knotless diamond shape mesh.

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Net mesh size: 5 cm x 5 cm.

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Net thickness:

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Coir net: 4 mm.

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PP net: 2 mm.

Installation

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Final grade should be smooth, free of rocks, sticks, and vegetation.

Do not install vegetated coir logs on hard, compacted soil.

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Logs should maintain solid contact with the soil and be installed to

minimize gaps between the bottom of the log and the substrate.

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Install logs at the approximate normal water level. Between 1/3 to

2/3 of the log should be submerged.

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Drive alternately-spaced hardwood stakes into the soil along the

sides of the log until the top of the stake is about 4 inches above it.

Stakes should be between 3 to 4 feet long, based on application, a

minimum of 1.25 inches thick, and spaced 2 to 3 feet apart.

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Notch hardwood stakes approximately 4 inches below the top of the

log deep enough to fit a 3/16 inch nylon rope. Crisscross the rope

over the top of the log. When complete, drive stakes down until rope

is tight against the log. Cut off excess from stakes so they are flush

with the top of the installed log.

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Couple adjacent logs together with supplemental rope, wire ties,

or cable ties.

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Supplemental plantings can be installed within the log and on the

front and back sides.

Bioengineering Materials