At the Lauwers Sea there were two options, to reinforce the existing dikes around the Lauwers Sea (32 km of dikes) or to make a 13 km dam separating the Lauwers Sea and the Wadden Sea.
Ved Lauwersmeer var der to muligheder for at styrke de eksisterende diger omkring Lauwersmeer (32 km dige) eller at lave en 13 km dæmning, der adskiller Lauwersmeer og Vadehavet.