Littlehampton Harbour has just released some great photos from work on dredging the Harbour Entrance by the masters of the long reach trade WM Plant.
The shoal bank is typically dredged using shore-side excavators at least twice per year.
The bar is maintained at 0.9m over datum by the natural scour effect of the River Arun. The various mooring operators arrange more regular local surveys and local dredging of berths as required.
Any dredging in the harbour must be covered by a Local Consent. Dredging may also require a Marine Licence from the Marine management Organisation (MMO).