The construction and maintenance of roads can result in the erosion of soil. This can have significant impacts on waterways resulting in a deterioration and destruction of flora, fauna, aesthetic features, structures and water quality.
We are committed to using careful planning and design to avoid or minimise the adverse effects of sediment discharges.
Erosion and sediment control is a range of techniques that can be used to prevent sediment entering natural waterways. These techniques may include:
We have developed a draft erosion and sediment control standard for our state highways to help us:
Our Erosion and sediment control guidelines were developed to assist roading practitioners with the selection and design of erosion and sediment control practices.
The accompanying inspection sheets are designed to provide guidance on how to implement erosion and sediment control practices on the ground.
Read the Erosion and sediment control guideline and inspection sheets
A value-for-money assessment was undertaken to compare the existing stormwater treatment requirements (phase one) with what would be required had our standard been in place (phase two) for six capital projects.
Read the value-for-money assessment
In 1999 a research report was released which focused on how the effects from road construction would meet the legal requirements of the Resource Management Act 1991 in regards to erosion and sediment control
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