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Nature & the Environment Preventing Stormwater Run-Off

The recently launched Terrastop Premium silt fence has gained widespread recognition from envi- ronmental officers as an effective solution to protect waterways from stormwater pollution.

Stormwater Run-Off can be a major cause of river polu- tion

Construction site stormwater run-off is a sig- nificant, and frequently underestimated, source of pollution. Activities, such as clear- ing, grading and excavating expose highly susceptible, disturbed soil, to weather erosion for prolonged periods.

Consequently building sites can quickly con- tribute more sediment to waterways and drainage systems than would normally occur over several decades (For example, on major projects soil loss can reach over 400 tonnes per hectare!). The deposited silt has been shown to cause serious environmental harm to aquatic habitats and result in increased public spending on activities such as dredg- ing and drain maintenance.

It is therefore important to establish sediment control plans to protect surrounding water- courses and avoid incurring severe penalties. Probably the most significant, and practical, solution used worldwide is silt fences, which can remove on average 70% of total sus- pended solids from run-off.

Terrastop Premium is a technical filter fabric, purpose made for this demanding application,

Hy-Tex Terrastop silt fence in use on National Grid’s Milford Haven to Aberdulais gas pipeline project.

which is used as an entrenched interception fence. It provides a simple, proven, conve- nient and cost effective method of trapping eroded material and is being used with great success on construction works throughout the UK (including a recent major gas pipeline across Wales).

For further information contact Hy-Tex (UK) Limited on 01233 720097 or visit

Pollution & Erosion Control

Flood Water Management Act 2010

section 38 and 39 The next stage of implementation of the Flood Water Management Act 2010 (FWMA) came into force on the 1st December 2011 with the commencement of the remaining parts of Sections 38 and 39 (incidental flooding or coastal erosion) in England and Wales.

Section 38 relates to the powers available to the Environment Agency and 39 to the Local Authorities. The sections allow these risk management authorities to manage flooding, water levels and coastal erosion in the interests of nature conservation, the preservation of cultural heritage or people’s enjoyment of the environment or cultural heritage.

In addition, the regulations under Sections 38(8) and 39(12) also came into force, which relate to powers of compulsary purchase, powers of entry and compensation.

Surface Erosion

CoirMesh™ tough biodegradable meshes protect vulnerable bare

surfaces from erosion and promote vegetation restoration.

Bank Protection CoirLog™ coconut fibre bio-rolls

protect water margins from erosion and provide a stable, healthy environment for the plant development.

Also suppliers of:

Geotextiles, Root Barrier, Newt Barriers, Weed Control Fabrics, Turf Meshes Hy-Tex (UK) Limited



Aldington Mill, Mill Lane,

Aldington, Ashford, Kent TN25 7AJ T: 01233 720097 F: 01233 720098

E: W: 25 © National Grid - Felindre to Brecon gas pipeline project Stormwater Run-Off

Terrastop™ Premium is a entrenched filter fence that traps harmful

suspended silts in construction site stormwater run-off.

Disturbed Sediments Sedimat™ matting traps harmful

sediments disturbed during in-stream construction activities without causing water back-up.

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