The riprap walls of Keuri Kad and Keuri Souf
These structures built according to a concept proposed
by a group of Dutch consultants are trapezoidal dikes 5m
wide at the top and 12 m at the base. Their peak is
located at 5m+ above sea level. The slopes are 45° and
the structure is based on a geotextile filter. The body of
the structure consists of rubble limestone of 3 to 5 kg and
is protected on the seaward side by basalt blocks of 1 to
2 tons. These walls were built between 1983 and 1990 and
are 3.5 kilometres long in total, with 2.85 km between
Keuri Souf and Bata. A recent evaluation has shown that
these walls collapsed in places. These structures are so
fragile, poorly protected and cannot prevent the highest
waves from overtopping. Moreover, the absence of
connecting arm at the southern end of the wall explains
why waves are skirting round and the Muslim cemetery of
Thiawlène is highly exposed.