Achtermeer

Together with the Klappolder, which was added a few years later, the Water Board of the Overdie and Achtermeer polders took its definitive form.

When planning this new neighbourhood, the subdivision and the polder ditches were the starting point for the street pattern.

From 1913 to 1988, the Alkmaar Diesel pumping station[2] maintained the water level in the Overdie and Achtermeer polders.

Since 1994, that pumping station has been a Provincial Monument; it still functions in times of exceptionally high water.

(The black arrow in the recent map indicates the location of the pumping station.)

South of the city of Alkmaar is the Achtermeer polder, drained in 1533.
The Diesel pumping station of the "Het Overdie en Achtermeer" polder has been a designated Provincial Monument since 1996. In 2011 the Foundation Diesel Pumping Station "J.J. Schilstra" has transferred the station to the Housing Corporation "Van Alckmaer".
The Achtermeerpolder (circled in blue) now lies within the city limits of Alkmaar. The black arrow indicates the location of the pumping station.