North Holland's reclaimed lakes: lakes that became farmland
Beemster, Purmer, Schermer: names of lakes that disappeared. What remained is a floor of clay below NAP, laid out in straight plots.
During the Dutch Golden Age, draining large lakes in North Holland to create land became profitable. Investors enclosed the water with dykes, windmills pumped it dry, and the lake bed was divided into a grid. The Beemster, drained in the early seventeenth century, is the best-known example and is listed as a World Heritage Site for its geometry: roads, drainage channels and plots laid out with compass-like precision. Purmer, Wormer and Schermer followed the same recipe. First wind power, later steam and electricity.
A reclaimed lake is not an ordinary polder behind a sea dyke. It is a former lake. The ring canal lies higher than the land. Pumping stations lift the water into the ring canal. Without that step, the reclaimed lake would fill with water. Farms and villages found their place on the new land and along the ring dyke. You can see the difference in water level from a bridge: outside the ring lies the old land, inside the basin lies the new.
The grid is not a fashion. It was geometry used to organise ownership and drainage at the same time. Cycle along a road that runs across the polder and you can count parallel ditches all the way to the horizon. That is the lake that became land.
In these flat expanses, North Holland preserves the moment when capital, windmills and measuring chains turned an inland body of water into farmland.
A fresh perspective
In a reclaimed lake, the canal surrounding the land lies higher than the farmland itself.
Step onto the ring dyke of the Beemster or Schermer and look inward: the land slopes away below you.