Custom Tapered Silt Curtains

Chatoyer custom tapered silt curtains protecting pipe intake

Chatoyer’s custom tapered silt curtains were used to protect a lake during construction along it’s shoreline. Construction involved extending a rockwall and creating a channel for an irrigation intake. Historically low water levels had offered ideal conditions for construction.

The deployment area was no more than 2.5m deep and the water conditions were challenging due to wave chop created from 40 – 60 knot winds. Chatoyer designed custom tapered silt curtains to accommodate the changing depth from the shoreline out into the lake.

Project Overview

Date: January 2016

Location: Arthur’s Lake, Tasmania, Australia

A series of poles had been installed around the perimeter of the GPT, used to keep the boom’s shape and allow it to rise and fall with the tide.

Chatoyer approached this replacement boom from a different perspective to the previous boom design. We designed and constructed custom sized individual panels to fit within the existing space between each pole. This required precise production planning and quality of build to ensure that the boom would fit the set parameters.

Features Summary

Silt Curtain Length: 315m overall manufactured in 15mL sections
Silt Curtain Depth: ranging from 0.5m to 2.0m deep
Silt Curtain Material:
Nonwoven Polypropylene Geotextile with 90 micron pore size; 100mm x 100mm closed cell foam floats

Project Summary

  • Since the water levels were ideal to start construction the silt curtains were required quickly. We met the client’s pressing deadline.
  • Testing during the six week construction period showed 400 NTU within the curtain, 60 NTU immediately after the curtain and <10 NTU out from the curtain perimeter.
  • Our silt curtain design and performance exceeded client expectations.
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