These often controlled only a small area, a single polder or dike. West Flanders consists of the North Sea coast, followed by a very flat polder landscape. The Flevopolder is a polder, or region of reclaimed land, in Flevoland, Netherlands. In North Holland only one polder was flooded. De Nieuwe Grond, Domburg, Houttuin, Koewarasan, Kwatta, Lelydorp, Saramacca Polder. After WWII, Urk's town spread into the polder. The first polder, Wieringermeer, was dammed in 1929 and fully drained in 1930. The development of the polder mill gave the option of draining the lakes. It lies immediately south of the polder and former municipality of Wieringermeer. The next step was draining all the water from the future polder. All three were built with extra capacity with the future southern polder in mind. Doubts began to surface about the cost-effectiveness of the polder. The colour gold indicates the high costs of the project of making the polder. Markerwaard is a planned fifth polder that has never been completed. There is no consensus about the exact historical background of the polder model.