Engineering in the water environment

What you must do

When working in or near the water environment you must have the appropriate authorisation to carry out the activity and you must ensure that you know and follow the rules of the authorisation.

In Scotland, Certain engineering works can be carried without contacting SEPA. However, where relevant, you must comply with the General Binding Rules (GBRs) and you must ensure you do not cause pollution.

Removing sediments from watercourses

Note: You must comply with GBR 9 on page 114 of the CAR Practical guide Car - A practical guide(Deals with operating any vehicle, plant or other equipment (machinery) in or near any surface water or wetland)

In Scotland, you do not need to contact SEPA if you’re removing sediments from within:

a field drain or completely man-made ditch
a small ditch that has been straightened in the past and has an average width of less than 1 metre measured at the bed – Comply with GBR 5 on page 101 of the CAR Practical guide (and GBR 9) (GBR5 now requires that the watercourse is not widened by the activity, that there are no steps in the bed slope and that removed sediment is not used to heighten the banks.)
10 metres upstream of a weir – Comply with GBR 12 on page 102 of CAR Practical guide(and GBR 9)
10 metres upstream or downstream of a closed culvert – Comply with GBR 13 on page 102 of CAR Practical guide (and GBR 9)
5 metres of an outfall or intake – Comply with GBR 13 on page 102 of CAR Practical guide (and GBR 9)

For any other dredging works in rivers, burns and lochs, you must contact SEPA for higher level authorisations – See SEPA: Authorisations

Removal of fallen trees, litter, debris and vegetation from watercourses

In Scotland, the removal of fallen trees, litter, debris and vegetation in or near watercourses can be carried out without contacting SEPA. However, vegetation removal from banks should be done in a way that minimises erosion.

Maintenance and repair of existing manmade structures

In Scotland, you do not need to contact SEPA when maintaining or repairing existing manmade structure, if you are:

using the same or equivalent type of materials it was constructed from, and
not changing the size shape or length of the structure

For any other works to existing banks, embankments or floodwalls you must contact SEPA for higher level authorisations – See SEPA: Authorisations

Reinforcing or re-profiling of a new section of river bank

In Scotland, you do not need to contact SEPA for the following works:

Green bank reinforcement or re-profiling, where the length does not exceed 10m or channel width (whichever is greater) – Comply with GBR 8 on page 113 of the CAR Practical guide (and GBR 9)
The placement of trees or parts of trees in a watercourse to protect eroding banks – Comply with GBR 25 on page 119 of the CAR Practical guide (and GBR 9)

For any other works involving reinforcing or re-profiling river banks you must contact SEPA for higher level authorisations – See SEPA: Authorisations

Bridges and other types of crossing structures

In Scotland, you do not need to contact SEPA for the following works:

Minor bridges with no construction on the bed or banks of the watercourse – Comply with GBR 6 on page 101 of the CAR Practical guide (and GBR 9)
Temporary bridges in rivers less than 5 metres wide – Comply with GBR 6 on page 101 of the CAR Practical guide (and GBR 9)
Pipeline or cable crossings bored beneath the bed of inland surface waters – Comply with GBR 7 on page 102 of the CAR Practical guide (and GBR 9)

For all other works involving bridges and other crossing structures you must contact SEPA for higher level authorisations – See SEPA: Authorisations

Placing or reinforcing structures in watercourses

In Scotland, placing boulders in watercourses can be carried out without contacting SEPA if the boulder placements occupy less than 10% of the channel width – Comply with GBR 14 on page 102 and GBR 9 of the CAR Practical guide

You must contact SEPA for higher level authorisations for:

all other works involving placing or reinforcing structures in watercourses
the removal of structures in watercourse

See SEPA: Authorisations

Channel modifications

Channel modification works include:

Diversions
Realignment
Flood by-pass channels
Culverting

In Scotland all works involving channel modification will require authorisation from SEPA - See SEPA: Authorisations