There are several moles protecting the Port of Algiers, but whereas the older ones are rubble mounds, the Mustapha Breakwater consisted of a vertical wall llm. thick with its base resting on a ...

Anglesey council has been told the 1.7 mile (2.4km) breakwater at Holyhead - the longest in Britain - is suffering from erosion to its rubble mound base. Ferry company Stena Line which owns the ...