These rules allow you to construct an outfall pipe of no more than 500 millimetres diameter through a headwall affecting no more than 1.5 metres of the river bank on a main river.
If the diameter of the outfall is less than 300mm you may be able to register an exemption.
These rules do not allow you to construct outfalls on or within:
- 8 metres of a flood defence
- 50 metres of a manmade structure in, under or over the watercourse
You must not carry out these activities during the fish breeding season.