Foulness SSSI Foulness SSSI Foulness SSSI is a 10,702 hectare biological Site of Special Scientific Interest covering the shoreline between Southend-on-Sea and the Crouch estuary in Essex. It is a key site in "A Nature Conservation Review", and is part of the Essex Estuaries Special Area of Conservation. It covers two Ramsar wetland sites of international importance, 'Crouch and Roach Estuaries' and 'Foulness'. An area of 6.4 hectares is Shoeburyness Old Ranges, a Local Nature Reserve managed by the Essex Wildlife Trust. Most of the site is owned and managed by the Ministry of Defence. Natural England describes it as "extensive intertidal
Foulness Island walls before the next spring tides, which were due on 16 February 300 soldiers and 70 sailors were drafted in. Three Royal Navy minesweepers, the "Cheerful", "Cockatrice" and "Rinaldo", were moored near Foulness Point, and were used as accommodation by the workers. The number of personnel had increased to 400 soldiers and 100 sailors by 11 February. High tide on 14 February was higher than expected, and washed away a section of the repaired wall at Shelford Creek, but repairs were again made, and the walls survived the spring tides of the following two days. Re-occupation of the island was