Dredging permissions are accompanied by detailed schedules of conditions, which set the parameters for dredging. This includes definition of the working area, the term of the dredging permission, and the permitted extraction tonnage.  The conditions also cover management, mitigation and monitoring requirements on a site-specific basis.

The management measures set out permitted working practices such as whether trailing or static dredging is permitted, whether screening is allowed, and defined access routes to and from the licence. Mitigation measures stipulate steps to be taken to minimise or reduce the potential effects of dredging, such as minimising the area available to be dredged at any time and seasonal restrictions.

Monitoring measures include bathymetric and side scan sonar surveys, benthic surveys, and fisheries studies, as well as the use of electronic monitoring systems (EMS) – ‘black boxes’ that record the time and location of all dredging activities using GPS satellite positioning. All vessel records are audited by the Marine and Fisheries Agency and the managing agents for The Crown Estate on a monthly basis. More