Development Application Part 2 - Environmental & Stormwater Management Plans · OPW11/0335

Sediment fences cannot be used to retain             Typical sediment fence installation
building waste and rubble


The most efficient sediment barrier for building sites is usually a specially manufactured geotextile
sediment fence. The use of filter cloth or shade cloth is not permitted (refer Figure 4.3).

Sediment fences on building sites can be stapled to
                                                                               With trench           Without trench
approximately 40 mm square hardwood posts or wire                                                            r1
                                                                                                    Port
tied to steel posts. Wire-tied sediment fences have the
advantage of being more readily unhooked from their
support posts during working hours to allow the
unloading of materials. This feature is useful on small
frontage building sites where site access is limited.

In areas where it is impractical to bury the lower edge
of the sediment fence, the lower 200 mm (min) portion
of the fabric should be placed on the ground up-slope                                                         V
of the fence and buried under a 100 mm (min) layer of
coarse aggregate (20-40 mm) (refer Figure 4.4).                      Alternative sediment fence installations (with and without
                                                                     a trench)
Sediment fences should be
located down-slope of the
disturbance, and ideally along a
line of constant land level to
prevent the concentration of
stormwater run-off. Where this
cannot be achieved then sections
of the sediment fence should
have 'returns' directed up slope
for 1-2 metres to control the
concentration of stormwater
run-off.




                                           Sediment fences require checking and maintenance at the end of each dal