The construction of the breakwater may lead to settlement of eventually soft soils under the breakwater. This will induce deformations of the breakwater during (a part) of its lifetime. Also stability issues of the breakwater should be taken into account in the design. For reliable analyses of both mechanisms (stability and settlements) more soil data is needed. The Dutch Consultant ARCADIS advised to execute soil tests to obtain data about the soil stratification and the soil parameters. The soil program is planned from a point of view that the obtained results enable a detailed final design.