Comment by tda

Concrete seawalls are almost always inferior to well engineered earth structures. Only when space is at a premium it may be better to use concrete, but in roughly all other cases a concrete structure is more expensive and more likely to fail catastrophically. But somehow a lot of people have the "something substantial needs to be done" mindset and just don't think moving earth is substantial enough. Or at least that is my tale when I see the pictures. Maybe someone knowledgeable on the local situation can chime in on why concrete was chosen?