Marine Management Organisation
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You can find information on the licensing requirements for dredging on the Do I need a marine licence? page.
If your dredging activity is between 500 and 3,000 cubic metres a campaign, and less than 10,000 cubic metres a year, it may be processed with a 10-working-day consultation.
You must be able to demonstrate the low-risk nature through complying with agreed criteria and local or regional conditions. MMO aims to decide qualifying applications within 20 working days.
If the activity has been assessed as part of a maintenance dredging baseline document or other agreed assessment, details should be included with the application and any conditions that form part of that assessment will be considered.
Activities will be licensed through this faster process if:
- dredging is ongoing and has been carried out in the same way for at least 3 years
- campaigns are separated by at least 1 month
- evidence on the quality of the sediment is provided
- the project is assessed as part of a maintenance dredging baseline document or another form of assessment agreed with Natural England
Other criteria relating to environmental protection and interference with other legitimate uses of the sea must also be met before a dredging activity can be confirmed as appropriate for the accelerated licensing process.
You must provide information on the physical and chemical characteristics of the dredged material with the application for it to be considered full and complete.
You must provide 1 surface sample that is representative of the area to be dredged for activities between 500 and 1,000 cubic metres a campaign and less than 10,000 cubic metres a year.
You must provide 2 surface samples that are representative of the area to be dredged for activities between 1,000 and 3,000 cubic metres a campaign and less than 10,000 cubic metres a year.
Where your application does not meet this accelerated licensing for dredging criteria the full marine licensing process will need to be followed.
Local and regional dredging conditions
These precautionary conditions have been developed in consultation with Natural England and Environment Agency. Each condition will include who you would need to contact if you wanted to discuss the relevance of the precautionary conditions to your specific project.
Migratory fish
| Condition | Reason for the condition | Where and when this condition applies | Who to contact |
|---|---|---|---|
| No dredging activities may be carried out between 1 March and 30 November | This is to avoid any detrimental impacts on migratory fish populations | This condition applies in the following areas, and potentially to all dredging applications: Plymouth Sound, Lynher River (upstream of Jupiter Point) , River Tavy (above Tavy Bridge) , River Tamar (above the village of Cargreen), Fowey (above Wisemans Point but not including area of commercial port activity) , Lymington River and Estuary (upper reaches of the estuary) , upstream of Lymington Marina (Berthon) , Southampton water (River Hamble upstream of dock-head in Southampton Water in Itchen and Test estuaries) , Poole, Chichester Harbour, Workington (where maintenance dredging is not considered in the MDP maintenance dredging baseline document) , Poole Harbour from Froome to Piddle, River Avon (Hampshire) , River Stour (Dorset) | Environment Agency |
Birds (overwintering and feeding)
| Condition | Reason for the condition | Where and when this condition applies | Who to contact |
|---|---|---|---|
| Between 1 October and 31 March, dredging activities may only be carried out up to 3 hours either side of high water | This is to avoid disturbing over-wintering, feeding and roosting birds on intertidal mudflats | This condition applies in all special protection areas (SPAs) and Ramsar sites with overwintering bird interests if dredging activities are located: inside or adjacent to SPA and Ramsar site, within 150 metres of exposed intertidal area. This condition does not apply if maintenance dredging activities are located alongside a working industrial wharf, jetty, berth or quay used 365 days a year, or within an associated berth pocket, or both. | Natural England |
Marine mammals
| Condition | Reason for the condition | Where and when this condition applies | Who to contact |
|---|---|---|---|
| No dredging activities may be carried out between 1 June and 31 July | This is to avoid disturbance to seals during the breeding season | This condition applies to all dredging activities within The Wash and North Norfolk Special Area of Conservation | Natural England |
Low dissolved oxygen
| Condition | Reason for the condition | Where and when this condition applies | Who to contact |
|---|---|---|---|
| All dredging activities must be discontinued if dead or distressed fish are observed during periods of hot weather and low river flows. The Environment Agency incident hotline should be contacted on 0800 80 70 60 | Dredging can lead to low dissolved oxygen levels in hot weather with low river flows | This condition applies to all dredging activities in all areas | Natural England |
Maintenance dredging baseline document or any other agreed document
| Condition | Reason for the condition | Where and when this condition applies | Who to contact |
|---|---|---|---|
| The licence holder must comply with all the provisions set out in the baseline document or protocol document | This is to ensure maintenance dredging activities are carried out in line with a relevant baseline or protocol document to demonstrate no likely signification effect | This condition applies in all areas (Natural England) and Appledore Shipyard, Taw Torridge Estuary Protocol Document 2008 (Environment Agency) for all maintenance dredging activities. | Natural England |
Invasive non-native species
| Condition | Reason for the condition | Where and when this condition applies | Who to contact |
|---|---|---|---|
| All dredging activities must comply with the Environment Agency check-clean-dry code of practice. For information contact the Environment Agency on 03708 506 506, or visit the Great Britain Non-Native Species Secretariat website | Demonstrate good practice to prevent the introduction, and restrict the spread, of invasive non-native species which may occur through dredging activities | This condition applies to all dredging activities in all areas | Natural England |
Harmful algal blooms River Thurne (Norfolk Broads)
| Condition | Reason for the condition | Where and when this condition applies | Who to contact |
|---|---|---|---|
| No dredging activities may be carried out between 1 March and 30 November | This is to prevent the occurrence of harmful algal blooms, which are known to occur between early spring and late autumn | This condition applies to all dredging activities in the River Thurne (Norfolk Broads) | Environment Agency |